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• The best way to hide data Encryption,Connection,Hardware

  - by Tico Raaphorst

  So to say, if i have a VPS which i own now, and i wanted to make the most secure and stable system that i can make. How would i do that? Just to try: I installed debian 7 with LVM Encryption via installation: You get the 2 partitions a /boot and a encrypted partition. When booting you will be prompted to fill in the password to unlock the encryption of the encrypted partition, Which then will have more partitions like /home /usr and swapspace which will automatically mount. Now, i do need to fill in the password over a VNC-SSL connection via the control panel website of the VPS hoster, so they can see my disk encryption password if they wanted to, they have the option if they wanted to look at what i have as data right? Data encryption on VPS , Is it possible to have a 100% secure virtual private server? So lets say i have my server and it is sitting well locked next to me, with the following examples covered bios (you have to replace bios) raid (you have to unlock raid-config) disk (you have to unlock disk encryption) filelike-zip-tar (files are stored in encrypted archives) which are in some other crypted file mounted as partition (archives mounted as partitions) all on the same system So it will be slow but it would be extremely difficult to crack the encryption. So to say if you stole the server. Then i only need to make the connection like ssh safer with single use passwords, block all incoming and outgoing connections but give one "exception" for myself. And maybe one for if i somehow lose my identity for the "exeption" What other overkill but realistic security options are available, i have heard about SElinux?

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• Dead Linux server - need help and options

  - by Choi S.

  All, I have a Dell PE 1950 w/ 2 SATA drives in a software RAID1. OS is CentOS 5.5 (2.6.18.x). Starting this afternoon we received HW errors (something on the bus is bad, E171F) and the machine became unresponsive. We hard booted and it came back up for about 5 hours but then it happened again. I'm trying to figure out our options. Unfortunately we do not have similar hardware but I have a small desktop that I can use. I was contemplating putting one of the drives into the desktop and then starting it up. My goal was to then P2V it using Vmware converter but apparently the free v5.x doesn't support hot cloning/converting on a RAID volume, only the Enterprise 4.x version of Converter does. My questions are: 1.) Is putting a single drive out of a RAID1 pair into another piece of HW is safe? Based on my research and understanding it appears to be but would like confirmation. 2.) Is there any work around to the Vmware Converter not supporting RAID volumes during a hot clone/convert session? 3.) Are there other options I'm overlooking? Thanks in advance for reading and responding. --Choi S.

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• Fixing a corrupted Windows Server 2003 server

  - by Keith

  I have a Windows Server 2003 server that is being mainly used for some reporting done in SQL Server. Recently Windows has started complaining about being corrupted, we are getting an NTFS error 55: The file system structure on the disk is corrupt and unusable. Please run the chkdsk utility on the volume \Device\HarddiskVolume1. The server is RAID 5 and I did have a disk die however the RAID never went degraded since I have a hotspare. I replaced the hot spare and I'm still having problems. When I run chkdsk I get tons of messages.. some are: Deleting corrupted attribute record (128, "") from file record segment 194746 Those go on for a while. Then it deletes some orphan files. Then it does Correcting error in index $I30 for file 132426 And that goes on for a while. Then I get tons of Recovering orphaned file RE1AB6~1.LOG into directory file 534959 I have seen a lot of errors relating to the SQL Server reporting services. What are my options at this point? I would prefer to fix the issue instead of building a new server but I don't know if I can at this point.

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• CD Drive not discovered

  - by user1009073

  I have a self built computer. it uses a P6T Deluxe motherboard, which has both SATA and IDE ports. This was built several years ago, and had an IDE CD/DVD drive. This drive started going bad (would not burn CDs correctly), so I decided to replace it. I had difficultly finding an IDE DVD drive, so I bought a SATA DVD drive. I opened the comnputer, took out the old DVD drive. I left the IDE cable in place, connected to the motherboard, but it is not connected to any drives. I hooked up the new DVD drive, both power and with a SATA data cable (SATA port 3 if I recall). (Sony Optiarc 24x , Newegg URL: http://www.newegg.com/Product/Product.aspx?Item=N82E16827118067 ) When I power on my computer, the drive does NOT show up in Explorer. I can hit the DVD eject button, and the drive will open up, so I know it at least is getting power. I thought, maybe something in the BIOS. When I go to BIOS, boot devices, it shows (1) floppy, (2) my hard drive (3) ATAPI CD Drive. The only other possible BIOS option I could find was uder 'Storage Configuration'. Configure Storage as: My setting is RAID, since I am using two drives in a RAID configuration. Other options were IDE and ACHI. Other than trying to find an IDE DVD drive, is there anything else I can try? The drive does not show up at all in Windows Explorer. I did put in a CD thinking that might help, but nothing happened. Thanks, GS

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• What hardware would I need (approx) to run ESXi server?

  - by mr.b

  Hi, I am considering to purchase off-the-shelf commodity hardware in order to build server that will host virtual machines using ESXi server. Intended purpose for this server is NOT mission critical tasks. It will have to run perhaps 20-50 Windows XP/Vista/7 virtual machines (in total, but closer to 20 figure). Each guest would have to have 1-2 GB of ram, and probably two-three times more disk space than guest OS needs with clean install and all updates applied (that would be around 6-8 GB for XP, and i believe closer to 10-15 for win7). Those guests will act as a test ground for a new product that is network management software, thus guests will idle most of their time once initially loaded, but if I give them some task to complete, they should be able to perform reasonably well. Now, from what I have learned... CPU is usually not much of an issue (6 cores would do it), memory should not be lacking, but doesn't have to be sum of all guests, because of overcommitment... That leads me to IO, which is, as it seems, the bottleneck. Since I have very little experience with ESXi (and ESX, too) server, I'd like to ask: How much memory could I save by overcommitment, and how does it affect performance? Is 6-core cpu enough to run above described system? Would it be possible to run entire server off two (or even one) SSD drives (to host system virtual disks, with few additional HDDs (2-3) in RAID 0 to be used as secondary storage? I read somewhere that ESXi allows having something like "master image", essentially virtual machine that is "deployed" many times, so that disk space can be saved by having only differences stored by specific guests, instead of copying around whole virtual disks. Is this true, and how can this help me? Are there any other things I need to take into consideration when building this off-the-shelf solution? I should probably mention here that I'm fully aware of issues like SPOF regarding power supply, raid 0, etc, but since it's only a testing ground and not a production system, it's not so important for me. Thanks, B.

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• GRUB reporting wrong partition type

  - by plok

  It all started when I had to replace one of the disks that the software RAID 1 on this machine currently uses. From that moment on I have not been able to boot to the Windows XP that is installed on the fourth hard drive, /dev/sdd. I am almost positive that the problem is related not to Windows but to GRUB, as if I unplug all the other hard drives so that the Windows XP disk is now /dev/sda it boots with no problem. The problem seems to be that GRUB detects a wrong partition type, which I understand suggest that something is really messed up. This is what I get when I try to follow the steps that until now had worked like a charm: grub> map (hd0) (hd3) grub> map (hd3) (hd0) grub> root (hd3,0) Filesystem type is ext2fs, partition type 0xfd 0xfd? That doesn't make sense. /dev/sdb and sdc are 0xfd (Linux raid), but not /dev/sdd: edel:~# fdisk -l [...] Disk /dev/sdd: 250.0 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00048d89 Device Boot Start End Blocks Id System /dev/sdd1 * 1 30400 244187968+ 7 HPFS/NTFS edel:/boot/grub# cat device.map (hd0) /dev/sda (hd1) /dev/sdb (hd2) /dev/sdc (hd3) /dev/sdd I have been trying to work this out for hours, to no avail. Can anyone point me in the right direction?

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• Expanding iSCSI LUNs (NTFS)

  - by Fatih

  I have a 4TB iSCSI LUN that formated as NTFS in Windows 2008. I've shared this formated volume as a folder over SMB. When the capacity of this volume is not enough, I have to add more iSCSI LUNs, but the end-users must see only the folder that I've shared before. So, when I expand the NTFS volume that is currently 4TB, with more iSCSI LUNS(for example 2 more 4TB LUN), if one of the luns is failed, or missing, will all of my data in the folder be lost? I imagine that the expanding ntfs volume is like RAID 0(striped). if it is like RAID 0, then all my data will be lost when one of the luns is failed, or missing. In brief, there are two questions in here: 1- What will be happened, if one of the luns is missing in an expanded ntfs volume? 2- Is there another way to merge all of iscsi luns as only a folder, in that way the users don't see any extra folder even if I add extra iscsi luns to the file server.(I don't mention about DFS) Regards.

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• Why is my rsync so slow?

  - by iblue

  My Laptop and my workstation are both connected to a Gigabit Switch. Both are running Linux. But when I copy files with rsync, it performs badly. I get about 22 MB/s. Shouldn't I theoretically get about 125 MB/s? What is the limiting factor here? EDIT: I conducted some experiments. Write performance on the laptop The laptop has a xfs filesystem with full disk encryption. It uses aes-cbc-essiv:sha256 cipher mode with 256 bits key length. Disk write performance is 58.8 MB/s. iblue@nerdpol:~$ LANG=C dd if=/dev/zero of=test.img bs=1M count=1024 1073741824 Bytes (1.1 GB) copied, 18.2735 s, 58.8 MB/s Read performance on the workstation The files I copied are on a software RAID-5 over 5 HDDs. On top of the raid is a lvm. The volume itself is encrypted with the same cipher. The workstation has a FX-8150 cpu that has a native AES-NI instruction set which speeds up encryption. Disk read performance is 256 MB/s (cache was cold). iblue@raven:/mnt/bytemachine/imgs$ dd if=backup-1333796266.tar.bz2 of=/dev/null bs=1M 10213172008 bytes (10 GB) copied, 39.8882 s, 256 MB/s Network performance I ran iperf between the two clients. Network performance is 939 Mbit/s iblue@raven $ iperf -c 94.135.XXX ------------------------------------------------------------ Client connecting to 94.135.XXX, TCP port 5001 TCP window size: 23.2 KByte (default) ------------------------------------------------------------ [ 3] local 94.135.XXX port 59385 connected with 94.135.YYY port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.09 GBytes 939 Mbits/sec

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• Oracle Linux screen freezes during installation

  - by Fearless

  I was installing Oracle Linux 6.4 on a server, and the screen suddenly froze. Here were the previous steps: I put in the disk, clicked install, checked the disk (no errors), did pre-install setup (clock, root password, host+domain name, etc.), configured two 40GB hard drives in a RAID1 array (no swap, 3100mb encrypted raid partitions, ~100mb ext4 partition mounting to /boot, encrypted ext4 RAID device with mounting to /), selected packages, hit continue. The system did its short preinstall processes, then when to the main installation screen with the long status bar. The installer proceeded like always, but around package 250 out of ~1000, the screen suddenly went black with a text cursor in the upper left corner of the screen and the mouse cursor in its previous place. Neither cursor moved and the only thing that triggered a response was a ctrl-alt-delete that rebooted it. I have run this in VMs before without this issue. Memtest hasn't reported anything, and the media check went smoothly. The machine has supported Ubuntu server without issues before. Any ideas? I have tried booting after that, but the grub bootloader tries to find fd0 for some reason (I have no idea why it would search for the floppy disk). UPDATE My server successfully installed, but won't boot up. I think that, for some reason, it is still using the old bootloader from the previous installation. Any ideas on how to fix that?

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• How to make a redundant desktop system with daily snapshots? (Is btrfs ready for use?)

  - by TestUser16418

  I want to configure a desktop system in which the home filesystem would be redundant (e.g. RAID-1), and would have weekly snapshots taken. I've already done this with ZFS, the snapshot system is wonderful, and with send/recv you can easily create backups on external media. Unfortunately, at that point, I want GNU+Linux and not FreeBSD or Solaris, so I'm looking for suggestions for good alternatives. I reckon that my alternatives are: btrfs - it seems to be exactly what I need, it has snapshots and commands that allow you to easily replicate zfs send. Yet all documentation mentions that it's still experimental. I can't seem to find any actual reports on its reliability or usability issues. Can you point me to any information on that issue that could clarify whether it would be a possible choice? I have a large preference for this option, mostly because I don't want to reformat the drives when btrfs becomes ready, but I there's no information on whether it's usable at all, whether it's a silly idea to use it, etc. The question that I cannot get the answer to is what does "experimental" mean. lvm snapshots and ext4 - preferably not, since it can consume an awful amount of space when new files are created. Creating 200 GB files requres 200 GB free space and 200 GB additionally for snapshots. I also have found it unreliable -- failed metadata rewrite results in an unreadable PV. I'm wondering how btrfs would compare here. A single filesystem (ext4) on a RAID-1 array with custom COW snapshots with hardlinks (like cp -al). That's my current preference if I can't use btrfs. So how experimental btrfs is, which should I choose, and do I have any other options? What if I don't keep external incremental backups, would that affect my choice?

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• Seeking faster access/transfer times for accounting application

  - by Markaway

  Our accounting software, Sage 50, has been getting slower to open on workstations and reading the company file. The company file only contains 2 years worth of transactions, and we just cleared out 2011 so the file size has gotten a lot smaller. There are 10 users, 6 of which are on it all day, 4 are on and off throughout the day. Our network is entirely GbE and the switches are set to prioritize traffic on that port number. Watching network traffic, we barely use 40% of the network capability on the workstation, so I don't think that is our bottleneck. Our server contains two older Raptors Sata 2(3GB/s) 150GB in RAID 1. We were considering switching to SSD's, but a lot of what I read says to stay away from MLC's, especially for production environment and definitely avoid putting them in a RAID config. So would upgrading to newer Raptors with SATA 3(6GB/s) offer noticable benefits? What other options are out there that aren't so expensive? Trying to keep it to 200-300 per drive. We need at least 150GB, but going to 250-300GB would be better as it gives us more room to grow. We have about 30% space remaining on what we have now.

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• Can't Remove Logical Drive/Array from HP P400

  - by Myles

  This is my first post here. Thank you in advance for any assistance with this matter. I'm trying to remove a logical drive (logical drive 2) and an array (array "B") from my Smart Array P400. The host is a DL580 G5 running 64-bit Red Hat Enterprise Linux Server release 5.7 (Tikanga). I am unable to remove the array using either hpacucli or cpqacuxe. I believe it is because of "OS Status: LOCKED". The file system that lives on this array has been unmounted. I do not want to reboot the host. Is there some way to "release" this logical drive so I can remove the array? Note that I do not need to preserve the data on logical drive 2. I intend to physically remove the drives from the machine and replace them with larger drives. I'm using the cciss kernel module that ships with Red Hat 5.7. Here is some information pertaining to the host and the P400 configuration: [root@gort ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.7 (Tikanga) [root@gort ~]# uname -a Linux gort 2.6.18-274.el5 #1 SMP Fri Jul 8 17:36:59 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux [root@gort ~]# rpm -qa | egrep '^(hp|cpq)' cpqacuxe-9.30-15.0 hp-health-9.25-1551.7.rhel5 hpsmh-7.1.2-3 hpdiags-9.3.0-466 hponcfg-3.1.0-0 hp-snmp-agents-9.25-2384.8.rhel5 hpacucli-9.30-15.0 [root@gort ~]# hpacucli HP Array Configuration Utility CLI 9.30.15.0 Detecting Controllers...Done. Type "help" for a list of supported commands. Type "exit" to close the console. => ctrl all show config detail Smart Array P400 in Slot 0 (Embedded) Bus Interface: PCI Slot: 0 Cache Serial Number: PA82C0J9SVW34U RAID 6 (ADG) Status: Enabled Controller Status: OK Hardware Revision: D Firmware Version: 7.22 Rebuild Priority: Medium Expand Priority: Medium Surface Scan Delay: 15 secs Surface Scan Mode: Idle Wait for Cache Room: Disabled Surface Analysis Inconsistency Notification: Disabled Post Prompt Timeout: 0 secs Cache Board Present: True Cache Status: OK Cache Ratio: 25% Read / 75% Write Drive Write Cache: Disabled Total Cache Size: 256 MB Total Cache Memory Available: 208 MB No-Battery Write Cache: Disabled Cache Backup Power Source: Batteries Battery/Capacitor Count: 1 Battery/Capacitor Status: OK SATA NCQ Supported: True Logical Drive: 1 Size: 136.7 GB Fault Tolerance: RAID 1 Heads: 255 Sectors Per Track: 32 Cylinders: 35132 Strip Size: 128 KB Full Stripe Size: 128 KB Status: OK Caching: Enabled Unique Identifier: 600508B100184A395356573334550002 Disk Name: /dev/cciss/c0d0 Mount Points: /boot 101 MB, /tmp 7.8 GB, /usr 3.9 GB, /usr/local 2.0 GB, /var 3.9 GB, / 2.0 GB, /local 113.2 GB OS Status: LOCKED Logical Drive Label: A0027AA78DEE Mirror Group 0: physicaldrive 1I:1:2 (port 1I:box 1:bay 2, SAS, 146 GB, OK) Mirror Group 1: physicaldrive 1I:1:1 (port 1I:box 1:bay 1, SAS, 146 GB, OK) Drive Type: Data Array: A Interface Type: SAS Unused Space: 0 MB Status: OK Array Type: Data physicaldrive 1I:1:1 Port: 1I Box: 1 Bay: 1 Status: OK Drive Type: Data Drive Interface Type: SAS Size: 146 GB Rotational Speed: 10000 Firmware Revision: HPDE Serial Number: 3NM57RF40000983878FX Model: HP DG146BB976 Current Temperature (C): 29 Maximum Temperature (C): 35 PHY Count: 2 PHY Transfer Rate: Unknown, Unknown physicaldrive 1I:1:2 Port: 1I Box: 1 Bay: 2 Status: OK Drive Type: Data Drive Interface Type: SAS Size: 146 GB Rotational Speed: 10000 Firmware Revision: HPDE Serial Number: 3NM55VQC000098388524 Model: HP DG146BB976 Current Temperature (C): 29 Maximum Temperature (C): 36 PHY Count: 2 PHY Transfer Rate: Unknown, Unknown Logical Drive: 2 Size: 546.8 GB Fault Tolerance: RAID 5 Heads: 255 Sectors Per Track: 32 Cylinders: 65535 Strip Size: 64 KB Full Stripe Size: 256 KB Status: OK Caching: Enabled Parity Initialization Status: Initialization Completed Unique Identifier: 600508B100184A395356573334550003 Disk Name: /dev/cciss/c0d1 Mount Points: None OS Status: LOCKED Logical Drive Label: A5C9C6F81504 Drive Type: Data Array: B Interface Type: SAS Unused Space: 0 MB Status: OK Array Type: Data physicaldrive 1I:1:3 Port: 1I Box: 1 Bay: 3 Status: OK Drive Type: Data Drive Interface Type: SAS Size: 146 GB Rotational Speed: 10000 Firmware Revision: HPDE Serial Number: 3NM2H5PE00009802NK19 Model: HP DG146ABAB4 Current Temperature (C): 30 Maximum Temperature (C): 37 PHY Count: 1 PHY Transfer Rate: Unknown physicaldrive 1I:1:4 Port: 1I Box: 1 Bay: 4 Status: OK Drive Type: Data Drive Interface Type: SAS Size: 146 GB Rotational Speed: 10000 Firmware Revision: HPDE Serial Number: 3NM28YY400009750MKPJ Model: HP DG146ABAB4 Current Temperature (C): 31 Maximum Temperature (C): 36 PHY Count: 1 PHY Transfer Rate: 3.0Gbps physicaldrive 2I:1:5 Port: 2I Box: 1 Bay: 5 Status: OK Drive Type: Data Drive Interface Type: SAS Size: 146 GB Rotational Speed: 10000 Firmware Revision: HPDE Serial Number: 3NM2FGYV00009802N3GN Model: HP DG146ABAB4 Current Temperature (C): 30 Maximum Temperature (C): 38 PHY Count: 1 PHY Transfer Rate: Unknown physicaldrive 2I:1:6 Port: 2I Box: 1 Bay: 6 Status: OK Drive Type: Data Drive Interface Type: SAS Size: 146 GB Rotational Speed: 10000 Firmware Revision: HPDE Serial Number: 3NM8AFAK00009920MMV1 Model: HP DG146BB976 Current Temperature (C): 31 Maximum Temperature (C): 41 PHY Count: 2 PHY Transfer Rate: Unknown, Unknown physicaldrive 2I:1:7 Port: 2I Box: 1 Bay: 7 Status: OK Drive Type: Data Drive Interface Type: SAS Size: 146 GB Rotational Speed: 10000 Firmware Revision: HPDE Serial Number: 3NM2FJQD00009801MSHQ Model: HP DG146ABAB4 Current Temperature (C): 29 Maximum Temperature (C): 39 PHY Count: 1 PHY Transfer Rate: Unknown

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• Installing Windows on HP Proliant Servers without SmartStart

  - by Fitzroy

  I have a PXE server for deploying Windows XP and Windows 7 to workstations. The process is as follows: Boot the workstation from the NIC. Workstation sends a DHCP request. DHCP server responds with an IP address and the location of the PXE server. Workstation downloads WinPE image file from PXE server via TFTP Workstation stores WinPE image file in memory and executes it. Once booted into WinPE, I connect to a network share to gain access to either the Windows XP or Windows 7 installation files. A custom script is launched to guide you through the process of formatting and partitioning the hard drive(s) (using DISKPART and FORMAT). Another custom script asks for details such as the hostname to assign to the workstation. The answers provided are used to build an unattended answer file (SIF [Setup Information File] for WinXP and XML for Win7). The Windows setup EXE is launched, passing the unattended answer file to it as a parameter. The Windows XP and Windows 7 installation sources have been customised to include the drivers for our Dell workstations. They also run a number of scripts upon first booting up to install software packages. This process works very well for our workstations and I would now like to use it for building our servers too. The vast majority of our servers are HP Proliant DL360 G6, DL380 G5 and DL380 G6. They’re running Windows Server 2003 (various editions) or 2008 (various editions). To date, we have always built the HP Proliant servers using the SmartStart CD provided. SmartStart does three useful things for us: Setup RAID with HP Array Configuration Utility (ACU). Installs and configures SNMP Installs various HP Tools for Windows (HP Array Configuration Utility, HP Array Diagnostic Utility, HP Proliant Integrated Management Log Viewer, etc) Using SmartStart I have never had to manually download and install Windows drivers for network, sound, video, etc. I'm not sure if this is because SmartStart copies drivers from the CD during setup, or whether Windows just has the drivers natively in its driver CAB. If I abandon the SmartStart CD in favour of my PXE server I would have to do the following: As I wont have access to ACU, I'll configure the RAID (before booting to the PXE server) by pressing F8 (during the boot process) to access Option ROM Configuration for Arrays (ORCA). Installation of SNMP and the HP Tools will have to be installed once the Windows installation is complete using the Proliant Support Pack. Is this method OK? Is there anything that the SmartStart CD does that I'll be unable to do by other means? Are there any disadvantages to not using the SmartStart CD? Many thanks. UPDATE 05/01/12 I’ve been reading through the SmartStart Scripting Toolkit documentation. The scripting toolkit contains command line tools which work within WinPE and can such things as configure BIOS settings, configure an array and setup ILO. I’m personally not too bothered about configuring BIOS settings as I rarely deviate from the defaults (unless the server is to be a Hyper-V host). I’m not too fussed about being able to configure the array from within WinPE, as I’m happy to just press F8 and use Option ROM Configuration for Arrays (ORCA). Although, if it’s easy enough to do, I will explore this further, as it saves time if everything can be configured from within WinPE. One of the nice features all the tools possess is that you can pass input files to them. EG. Configure one server to your requirements, capture its configuration to a file (using the appropriate tool), you can then use the tool on other servers passing the input file with the captured configuration. Array controller drivers appear to be included with the toolkit along with example of how to incorporate them within a WinPE build. I suppose WinPE won’t be able to see logical volumes (I.E 2x physical disks in a RAID 1 configuration) without the array controller drivers? I mentioned in my post that SmartStart normally installs a bunch of Windows HP tools for you. I’ve had a look today, and if you run the SmartStart CD from within Windows all the tools can be installed. Therefore I can do this after the Windows installation is complete. The SmartStart CD appears to contain a lot Windows drivers. I can customise my Windows 2008 source to incorporate these drivers. However, I understand that incorporating an array controller driver is a little different to most drivers. I believe that you have to provide the driver during the very early stages of the Windows setup. I’m working through the Scripting Toolkit documentation to try and work this out...

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• Introducing Oracle System Assistant

  - by B.Koch

  by Josh Rosen One of the challenges with today's servers is getting the server up and running and understanding what all of the steps are once you plug the server in for the first time. So many different pieces come into play: installing drivers, updating firmware, configuring RAID, and provisioning the operating system. All of these steps must be done before you can even start using the server. Finding the latest firmware and drivers, making sure you have the right versions, and knowing that all the different software and firmware components work together properly can be a real challenge. If not done correctly, such as if you separately downloading disk firmware or controller firmware that doesn't match the existing OS drivers, you could experience bugs, performance problems, and incompatibilities. Gone are the days of having to locate the tools and drivers media that shipped with the server only to find out that newer versions of software and firmware are available on the web. Oracle has solved these challenges in the new X3-2 family of servers by introducing Oracle System Assistant. Oracle System Assistant is an innovative tool that is built-in to every new x86 server. It provides step-by-step assistance with configuring the server, updating firmware and drivers, and provisioning the operating system. Once you have completed all of the steps in the Oracle System Assistant tool, the server is ready to use. Oracle System Assistant was designed to be easy and straightforward. Starting it is as simple as pressing F9 when the server is booting. You'll need a keyboard, monitor, and mouse or you can use the remote console feature of Oracle ILOM (Integrated Lights Out Manager) to access a virtual KVM to the server from any machine. From there Oracle System Assistant will walk you through each of the steps necessary to set up your server. After configuring the network settings for Oracle System Assistant, the next step is to check for any new software or firmware for the server. Oracle System Assistant connects back to Oracle using your My Oracle Support account and downloads any updates that were made available to you for this specific server. This is where you really start to see the innovation that went into Oracle System Assistant. Firmware for Oracle ILOM and BIOS, operating system drivers, and other system firmware (including for option cards and disk drivers) come as a single bundle, downloading as a single unit, that has been engineered and tested to work together by Oracle. Oracle System Assistant figures out the right combination for your server, so you don't have to. Now that the server has the latest firmware, Oracle System Assistant will next walk you through configuring the hardware. From Oracle System Assistant, you can configure many Oracle ILOM settings, including the network settings and initial user accounts. This ensures that ILOM is accessible and ready to use. Oracle System Assistant is where all parts of the server come together. In addition to communicating with Oracle ILOM and interacting with BIOS, Oracle System Assistant understands and can configure the storage subsystem. Before installing the operating system, Oracle System Assistant can detect the storage configuration and configure RAID for all disks in the system. At this point, the server is ready to be provisioned with the host operating system. You can use Oracle System Assistant to provision a supported OS, including Oracle Linux, Oracle VM, RHEL, SuSe Linux, and Windows. And by using Oracle System Assistant, you can be sure that the proper OS drivers are installed for each of the installed hardware components. With Oracle System Assistant, initial setup of the server has never been easier. If we can innovate around problems and find solutions to make our servers easier to manage, this reduces IT costs and makes managing servers simpler. I think with Oracle System Assistant we have done just that. Josh Rosen is a Principal Product Manager at Oracle and previously spent more than a decade as a developer and architect of system management software. Josh has worked on system management for many of Oracle's hardware products ranging from the earliest blade systems to the latest Oracle x86 servers.

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• Virtualized data centre&ndash;Part three: Architecture

  - by marc dekeyser

  Having the basics (like discussed in the previous articles) is all good and well, but how do we get started on this?! It can be quite daunting after all!   From my own point of view I can absolutely confirm your worries and concerns, but also tell you that it is not as hard as it seems! Deciding on what kind of motherboard to buy, processor and how much memory is an activity you will spend quite some time doing research on. And that is not even mentioning storage! All in all it comes down to setting you expectations and your budget. Probably adjusting your expectations according to your budget :). Processors As a rule of thumb you want VT-D (virtualization) technology built in to the processor allowing you to have 64 bit machines running on your host. Memory The more the better! If you are building a home lab don’t bother with ECC unless you are going to run machines that absolutely should be on all the time and your comfort depends on it! Motherboard Depends on what you are going to do with storage: If you are going the NAS way then the number of SATA port/RAID capabilities do not really matter. If you decide to have a single server with lots of dedicated storage it obviously matters how much SATA ports you will have, alternatively you could use a RAID controller (but these set you back a pretty penny if you want one. DELL 6i’s are usually available for a good bargain if you can find one!). Easiest is to get one with a built-in graphics card (on-board) as you are just adding more heat, power usage and possible points of failure. Networking Just like your choice of motherboard the networking side tends to depend on how you want to go. A single virtualization  host with local storage can usually get away with having a single network card, a cluster or server which uses iSCSI storage tends to have more than one teamed up :). Storage The dreaded beast from the dark! The horror which lives in the forest! The most difficult decision you are going to make in the building of your lab. Why you might ask? Simple my friend, having the right choice of storage can make or break your virtualization solution. The performance of you storage choice will have an important impact on the responsiveness of your virtual machines and the deployment of new machines. It also makes a run with your budget! If you decide to go the NAS route you will be dropping a lot more money than if you would be having just a bunch of disks sitting in a server and manually distributing the virtual machines over the disks. Platform I’m a Microsoftee so Hyper-V is a dead giveaway for me. If you are interested in using VMware I won’t stop you but the rest of my posts will be oriented on Server 2012 Hyper-V (aka 3.0)! What did I use? Before someone asks me this in the comments I’ll give you a quick run down of what I am using. - Intel 2.4 quad core processors (i something something) - 24 GB DDR3 Memory - Single disk in each server (might look at this as I move the servers to 2012) - Synology DS1812+ NAS - 3 network interfaces where possible - HP1800 procurve managed switch I decided to spring for the NAS as I will also be using it for backups and media storage (which is working out quite nicely with my Xbox 360 I must say). At the time of building my 2 boxes (over a year and a half ago) these set me back about 900 euros each so I can image you can build the same or better for a lower price. Next article will be diagramming what I want to achieve and starting a build on the Hyper V 3.0 cluster!

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• SQL Server 2005 standard filegroups / files for performance on SAN

  - by Blootac

  Ok so I've just been on a SQL Server course and we discussed the usage scenarios of multiple filegroups and files when in use over local RAID and local disks but we didn't touch SAN scenarios so my question is as follows; I currently have a 250 gig database running on SQL Server 2005 where some tables have a huge number of writes and others are fairly static. The database and all objects reside in a single file group with a single data file. The log file is also on the same volume. My interpretation is that separate data files should be used across different disks to lessen disk contention and that file groups should be used for partitioning of data. However, with a SAN you obviously don't really have the same issue of disk contention that you do with a small RAID setup (or at least we don't at the moment), and standard edition doesn't support partitioning. So in order to improve parallelism what should I do? My understanding of various Microsoft publications is that if I increase the number of data files, separate threads can act across each file separately. Which leads me to the question how many files should I have. One per core? Should I be putting tables and indexes with high levels of activity in separate file groups, each with the same number of data files as we have cores? Thank you

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• Ideal directory structure for web application

  - by rno

  I'm about to create a user based website and will have to store photo, docs and other data for each user. If I take a silly number like 1 000 000 000 users, I believe than one folder with 1 000 000 000 won't be the fastest thing in the world! So I was thinking of creating something like 1st level : [a-z] 2nd level : [a-z] 3rd level : [a-z] Therefor bobby will be in /b/o/b/by But this also mean that it won't be spread equaly, because there will be very few user starting with a z and many more with a m,s,l ... so I was thinking of using a user id such as "000000000001", "000000000001" etc... 1st level : [000-999] 2nd level : [000-999] 3rd level : [000-999] therefore data of the user 000000000001 will be store in /data/000/000/000/001 then I will be sure to have a maximum of 1000 folder in each level. What do you guys think about it, what I should do or not do ? The server will be running Centos 5.4 with EXT3 on raid 1, if the I/O get's too bad i will probably go for a raid 10.

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• CodePlex Daily Summary for Friday, March 12, 2010

  CodePlex Daily Summary for Friday, March 12, 2010New Projects.NET DEPENDENCY INJECTION: Abel Perez Enterprise FrameworkAutodocs - WCF REST Automatic API Documentation Generator: Autodocs is an automatic API documentation generator for .NET applications that use Windows Communication Foundation (WCF) to establish REST API's.BlockBlock: Block Block is a free game. You know Lumines and you will like BlockBlock.C4F XNA ASCII Post-Processing: This is the source code for the Coding4Fun article "XNA Effects – ASCII Art in 3D"ChequePrinter: this is ChequePrinterCompiladores MSIL usando Phoenix (PLP 2008.1 - CIn/UFPE): Este projeto foi feito com o intuito de explorar a plataforma Microsoft Phoenix para a construção de compiladores para MSIL de duas linguagens de E...CRM External View: CRM External View enables more robust control over exposing Microsoft CRM data (in a form of views) for external parties. The solution uses web ser...CS Project2: This is for the projectDotNetNuke IM Module of Facebook Like Messenger: Help you integrate 123 Web Messenger into DotNetNuke, and add a powerful 1-to-1 IM Software named "Facebook Messenger Style Web Chat Bar" at the bo...DotNetNuke® RadPanelBar: DNNRadPanelBar makes it easy to add telerik RadPanelBar functionality to your module or skin. Licensing permits anyone to use the components (incl...DotNetNuke® Skin Blocks: A DotNetNuke Design Challenge skin package submitted to the "Modern Business" category by Armand Datema of Schwingsoft. This skin uses a bit of jQu...Drilltrough and filtering on SSAS-cubes in SSRS: We will describe a technique to create Reporting services (SSRS) reports that use Analysis services (SSAS) cubes as data sources, have a very intu...Ecosystem Diagnosis & Treatment: The Ecosystem DIagnosis & Treatment community provides tools, analyses and applications of the medical model to natural resource problems. EDT sof...ExIf 35: A utility for use by film photographers for keeping track of critical facts about images taken on a roll of film, just as digital cameras do automa...FabricadeTI: Desenvolvimento do framework FabricadeTI.Find and Replace word in the sentences: This program used Java Development Kid 6.0 and i were using HighLighter class. It was completed code with source code and then everybody can use in...Flash Nut: Flash Nut is a flash card program. You can build and review decks of flash cards. The project is a vs2008 wpf application.Free DotNetNuke Chat Module (Popup Mode): With this free DotNetNuke Chat Module (Popup Mode), master will assist to integrate DotNetNuke with 123 Flash Chat seamlessly, and add a popup mode...Free DotNetNuke IM of 123 Web Messenger -- Web-based Friend List: With this FREE application, you could integrate DNN website Database with 123 Web Messenger seamlessly and embed a web-based Friends List into anyw...Free DotNetNuke Live Help Module: With DotNetNuke Live Help Module, integrate 123 Live Help into DotNetNuke website and add Live Chat Button anywhere you like. Let visitors to chat ...G52GRP Videowall: NottinghamHappy Turtle Plugins for BVI :: Repository Based Versioning for Visual Studio: The Happy Turtle project creates plugins for the Build Version Increment Add-In for Visual Studio (BVI). The focus is to automatically version asse...Hasher: Hasher es capaz de generar el hash MD5 y SHA de textos de hasta 100.000 caracteres y ficheros. También te permitirá comprobar dos hash para verifi...Infragistics Silverlight Extended Controls: This project is a group of controls that extend or add functionality to the Infragistics Silverlight control suite. This control requires Infragis...Insert Video Jnr: This is a baby version of my Video plugin, it is intended for Hosted Wordpress blogs only and shouldn't be used with other blog providers.jccc .NET smart framework: jccc .NET smart framework allows the creation of fast connections to MSSQL or MYSQL databases, and the data manipulation by using of c# class's tha...LytScript: 函数式脚本语言Microsoft - DDD NLayerApp .NET 4.0 Example (Microsoft Spain): DDD NLayered App .NET 4.0 Example By Microsoft - Spain Domain Driven Design NLayered App .NET 4.0 Example Implementation Example of our local Arc...mimiKit: Lightweight ASP.NET MVC / Javascript Framework for creating mobile applications PHPWord: With PHPWord you can easily create a Word document with PHP. PHPWord creates docx Files that can include all major word functions like TextElements...Protocol Transition with BizTalk: An example solution the shows how todo Protocol Transition with BizTalk. This also shows you how to create a WCF extension to allow this to happen.Raid Runner: Raid Runner makes it easier to run and manage raid in World of Warcraft. It is a Silverlight application developed in c#SQL Server Authentication Troubleshooter: SQL Server Authentication Troubleshooter is a tool to help investigate a root cause of ‘Login Failed’ error in SQL Server. There could be number of...SuperviseObjects: SuperviseObjects consists of a collection which is derived from ObservableCollection<T>. This collection fires ItemPropertyChanging and ItemPropert...Viuto: Viuto.NET project aims to create a fully track and trace application. It is developed in: - Java & C: Firmware - C#: Parser - Asp.net: Tracki...Zealand IT MSBuild Tasks: Zealand IT MSBuild Tasks is a collection that you cannot do without if you are serious about continous integration. Ever wish you could specify an...New ReleasesASP.NET: ASP.NET MVC 2 RTM: This release contains the source code for ASP.NET MVC 2 RTM as well as the ASP.NET MVC Futures project. The futures project contains features that ...C#Mail: Higuchi.Mail.dll (2010.3.11 ver): Higuchi.Mail.dll at 2010-3-11 version.C#Mail: Higuchi.MailServer.dll (2010.3.11 ver): Higuchi.MailServer.dll at 2010.3.11 version.C4F XNA ASCII Post-Processing: XNA ASCII FPS v1 - Full Version: This is the full, complete example of the XNA ASCII FPS.C4F XNA ASCII Post-Processing: XNA ASCII FPS v1.0 - Base Project: This is the base project to be used by those who plan to follow along the Coding4Fun article.CRM External View: 1.0: Release 1.0DevTreks -social budgeting that improves lives and livelihoods: Social Budgeting Web Software, DevTreks alpha 3c: Alpha 3c upgrades custom/virtual uris (devpacks), temp uris, and zip packages. This is believed to be the first fully functional/performant release.DotNetNuke® RadPanelBar: DNNRadPanelBar 1.0.0: DNNRadPanelBar makes it easy to add telerik RadPanelBar functionality to your module or skin. Licensing permits anyone to use the components (inclu...Drilltrough and filtering on SSAS-cubes in SSRS: Release 1: Release 1ExIf 35: ExIf 35: Daily build of ExIf 35Family Tree Analyzer: Version 1.0.3.0: Version 1.0.3.0 Added options to check for updates on load and on help menu Disable use of US census for now until dealt with years being differen...Family Tree Analyzer: Version 1.0.4.0: Version 1.0.4.0 Added support for display of Ahnenfatel numbers Added filter to hide individuals from Lost Cousins report that have been flagged a...Flash Nut: Flash Nut 1.0 Setup: Flash Nut SetupFluent Validation for .NET: 1.2 RC: This is the release candidate for FluentValidation 1.2. If no bugs are found within the next couple of weeks, then this will become the 1.2 Final b...Free DotNetNuke Chat Module (Popup Mode): Download DNN Chat Module (Popup Mode)+Source Code: Feel free to download DotNetNuke Chat Module (Popup Mode), integrating DotNetNuke with 123 Flash Chat Software, and add a free popup mode flash cha...Free DotNetNuke Live Help Module: Download DNN Live Support Module and Source Code: In Readme file, there are detailed Installation and Integration Manual for you. This module is compatible with DotNetNuke v5.x.Happy Turtle Plugins for BVI :: Repository Based Versioning for Visual Studio: Happy Turtle 1.0.44927: This is the first release of the SVN based version incrementor. How To InstallMake sure that Build Version Increment v2.2.10065.1524 or newer is i...Hasher: 1.0: Versión inicial de la aplicación: Obtención de hash MD5 y SHA. Codificación en tiempo real de textos de hasta 100.000 caracteres. Codificación ...Jamolina: PhotosynthDemo: PhotosynthDemoMapWindow GIS: MapWindow 6.0 msi (March 11): This fixes an PixelToProj problem for the Extended Buffer case, as well as adding fixes to the WKBFeatureReader to fix an X,Y reversal and some ext...Math.NET Numerics: 2010.3.11.291 Build: Latest alpha buildMicrosoft - DDD NLayerApp .NET 4.0 Example (Microsoft Spain): V0.5 - N-Layer DDD Sample App: Required Software (Microsoft Base Software needed for Development environment) Unity Application Block 1.2 - October 2008 http://www.microsoft.com/...MiniTwitter: 1.09.2: MiniTwitter 1.09.2 更新内容 修正 タイムラインを削除すると落ちるバグを修正 稀にタイムラインのスクロールが出来ないバグを修正Nestoria.NET: Nestoria.NET 0.8: Provides access to the Nestoria API. Documentation contains a basic getting started guide. Please visit Darren Edge's blog for ongoing developmen...Pod Thrower: Version 1.0: Here is version 1.0. It has all the features I was looking to do in it. Please let me know if you use this and if you would like any changes.SharePoint Ad Rotator: SPAdRotator 2.0 Beta: This new release of the Ad Rotator contains many new features. One major new feature is that jQuery has been added to do image rotation without hav...SharePoint Objects: Democode Ton Stegeman: These download contains sample code for some SharePoint 2007 blog posts: TST.Themes_Build20100311.zip contains a feature receiver that registers Sh...SharePoint Taxonomy Extensions: SharePoint Taxonomy Extensions 1.2: Make Taxonomy Extensions useable in every list type. Not only in document libraries.SharePoint Video Player Web Part & SharePoint Video Library: Version 3.0.0: Absolutely killer feature - installing multiple players on a page without any loss of performance.SilverLight Interface for Mapserver: SLMapViewer v. 1.0: SLMapviewer sample application version 1.0. This new release includes the following enhancements: Silverlight 3.0 native Added a new init parame...Spark View Engine: Spark v1.1: Changes since RC1Built against ASP.NET MVC 2 RTMSPSS .NET interop library: 2.0: This new version supports SPSS 15, and includes spssio32.dll and other native .dll dependencies so that it works out of the box without SPSS being ...stefvanhooijdonk.com: SharePoint2010.ProfilePicturesLoader: So, with the help of Reflector, I wrote a small tool that would import all our profile pictures and update the user profiles. http://wp.me/pMnlQ-6G SuperviseObjects: SuperviseObjects 1.0: First releaseTortoiseSVN Addin for Visual Studio: TortoiseSVN Addin 1.0.5: Feature: Visual Studio/svn action synchronization on Item in Solution explorer like add, move, delete and rename. Note: Move action does not rememb...VCC: Latest build, v2.1.30311.0: Automatic drop of latest buildVivoSocial: VivoSocial 7.0.4: Business Management ■This release fixes a Could not load type error on the main view of the module. Groups ■Group requests were failing in some i...WikiPlex – a Regex Wiki Engine: WikiPlex 1.3: Info: Official Version: 1.3.0.215 | Full Release Notes Documentation - This new documentation includes Full Markup Guide with Examples Articles ...Zealand IT MSBuild Tasks: Zealand IT MSBuild Tasks: Initial beta release of Zealand IT MSBuild Tasks. Contains the following tasks: RunAs - Same as Exec task, but provides parameters for impersonat...ZoomBarPlus: V1 (Beta): This is the initial release. It should be considered a beta test version as it has not been tested for very long on my device.Most Popular ProjectsMetaSharpWBFS ManagerRawrAJAX Control ToolkitMicrosoft SQL Server Product Samples: DatabaseSilverlight ToolkitWindows Presentation Foundation (WPF)ASP.NET Ajax LibraryASP.NETMicrosoft SQL Server Community & SamplesMost Active ProjectsUmbraco CMSRawrN2 CMSBlogEngine.NETFasterflect - A Fast and Simple Reflection APIjQuery Library for SharePoint Web Servicespatterns & practices – Enterprise LibraryFarseer Physics EngineCaliburn: An Application Framework for WPF and SilverlightSharePoint Team-Mailer

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• Slow local file transfer (copy) on ESX vmware server?

  - by Sorin Sbarnea

  I have a 8 CPU VmWare ESX server (3.5) with 4 HDD drives in RAID that is not loaded at all. I enabled SSH and installed mc (midnight commander) in order to be able to copy(clone) virtual machines but I observed that if does copy the files very slow - around 3.5mb/s on local drive. Why is this happening and how should I solve the issue?

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• JBOD with PERC H810

  - by primero

  I'm wondering if anybody has ever used Dell storage products like the MD3220 array in a JBOD configuration. From what I can tell only perc h810 will work for external JBOD but that is not terribly specific, and for some reason I couldn't find many examples on the web of people configuring dell storage products as JBOD. My question is: Is it possible to connect to am MD3220 array, or other Dell arrays using a PERC h810 controller and use it as JBOD, and if so do I have to configure every disk in the array as a RAID 0 volume?

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• Openfiler The NFS server does not support MOUNT version 3 over TCP

  - by chrisling106

  Hi there, I no longer able to mount my Openfiler NAS after created a new RAID10 array (but dun think that has anything to do with the new RAID setup) from my ESXi box. The NFS server does not support MOUNT version 3 over TCP Any ideas, please?

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• Failed MDADM Array With Ext.4 Partition - "e2fsck: unable to set superblock flags on /dev/md0"

  - by Matthew Hodgkins

  Had a power failure and now my mdadm array is having problems. sudo mdadm -D /dev/md0 [hodge@hodge-fs ~]$ sudo mdadm -D /dev/md0 /dev/md0: Version : 0.90 Creation Time : Sun Apr 25 01:39:25 2010 Raid Level : raid5 Array Size : 8790815232 (8383.57 GiB 9001.79 GB) Used Dev Size : 1465135872 (1397.26 GiB 1500.30 GB) Raid Devices : 7 Total Devices : 7 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Sat Aug 7 19:10:28 2010 State : clean, degraded, recovering Active Devices : 6 Working Devices : 7 Failed Devices : 0 Spare Devices : 1 Layout : left-symmetric Chunk Size : 128K Rebuild Status : 10% complete UUID : 44a8f730:b9bea6ea:3a28392c:12b22235 (local to host hodge-fs) Events : 0.1307608 Number Major Minor RaidDevice State 0 8 81 0 active sync /dev/sdf1 1 8 97 1 active sync /dev/sdg1 2 8 113 2 active sync /dev/sdh1 3 8 65 3 active sync /dev/sde1 4 8 49 4 active sync /dev/sdd1 7 8 33 5 spare rebuilding /dev/sdc1 6 8 16 6 active sync /dev/sdb sudo mount -a [hodge@hodge-fs ~]$ sudo mount -a mount: wrong fs type, bad option, bad superblock on /dev/md0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so sudo fsck.ext4 /dev/md0 [hodge@hodge-fs ~]$ sudo fsck.ext4 /dev/md0 e2fsck 1.41.12 (17-May-2010) fsck.ext4: Group descriptors look bad... trying backup blocks... /dev/md0: recovering journal fsck.ext4: unable to set superblock flags on /dev/md0 sudo dumpe2fs /dev/md0 | grep -i superblock [hodge@hodge-fs ~]$ sudo dumpe2fs /dev/md0 | grep -i superblock dumpe2fs 1.41.12 (17-May-2010) Primary superblock at 0, Group descriptors at 1-524 Backup superblock at 32768, Group descriptors at 32769-33292 Backup superblock at 98304, Group descriptors at 98305-98828 Backup superblock at 163840, Group descriptors at 163841-164364 Backup superblock at 229376, Group descriptors at 229377-229900 Backup superblock at 294912, Group descriptors at 294913-295436 Backup superblock at 819200, Group descriptors at 819201-819724 Backup superblock at 884736, Group descriptors at 884737-885260 Backup superblock at 1605632, Group descriptors at 1605633-1606156 Backup superblock at 2654208, Group descriptors at 2654209-2654732 Backup superblock at 4096000, Group descriptors at 4096001-4096524 Backup superblock at 7962624, Group descriptors at 7962625-7963148 Backup superblock at 11239424, Group descriptors at 11239425-11239948 Backup superblock at 20480000, Group descriptors at 20480001-20480524 Backup superblock at 23887872, Group descriptors at 23887873-23888396 Backup superblock at 71663616, Group descriptors at 71663617-71664140 Backup superblock at 78675968, Group descriptors at 78675969-78676492 Backup superblock at 102400000, Group descriptors at 102400001-102400524 Backup superblock at 214990848, Group descriptors at 214990849-214991372 Backup superblock at 512000000, Group descriptors at 512000001-512000524 Backup superblock at 550731776, Group descriptors at 550731777-550732300 Backup superblock at 644972544, Group descriptors at 644972545-644973068 Backup superblock at 1934917632, Group descriptors at 1934917633-1934918156 sudo e2fsck -b 32768 /dev/md0 [hodge@hodge-fs ~]$ sudo e2fsck -b 32768 /dev/md0 e2fsck 1.41.12 (17-May-2010) /dev/md0: recovering journal e2fsck: unable to set superblock flags on /dev/md0 sudo dmesg | tail [hodge@hodge-fs ~]$ sudo dmesg | tail EXT4-fs (md0): ext4_check_descriptors: Checksum for group 0 failed (59837!=29115) EXT4-fs (md0): group descriptors corrupted! EXT4-fs (md0): ext4_check_descriptors: Checksum for group 0 failed (59837!=29115) EXT4-fs (md0): group descriptors corrupted! Please Help!!!

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• HP SmartArray P212 with non HP disks, Insight Diagnostics error

  - by yonatan

  I have an ML110 G6 with a SmartArray P212 and two Seagate (non-HP) SAS disks in Raid 1. When I ran HP Insight Diagnostics I got some errors related to S.M.A.R.T. error testing and I would like to confirm that this is due to the controller not being able to query the drives as they are non-HP. I believe that the drives are not failing, but I want to be sure. Please have a look at these screenshots I took from the Insight Diagnostics report:

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• Nginx php-fpm high cpu usage

  - by Piotr Kaluza

  I have a problem with a high traffic wordpress, super high CPU load under nginx php-fpm, I am caching with apc, and memcached, spent 2-3 days tweaking configs and looking for answers it seems to me that php-fpm takes up all the cpu available no matter how many max_children i set if i set 5 then the load is 20% each, if i set 20 then the load adds up till 90% i tried static and dynamic server is 2x3.0Ghz 6GB Ram SSD in raid 10 on ubuntu 12.04 x64 utpime: 17:27:51 up 2:19, 1 user, load average: 29.79, 28.08, 26.29 what can be the issue?

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• HomeMade/DIY NAS solution

  - by MicTech

  Has anyone experience with building NAS (Network-attached storage) for home/small office using? What component would you recommend? Hardware CPU motherboard HDDs RAID controller etc. Software OS FTP HTTP etc.

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