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• Migrate Windows Server 2008 to a new hard disk

  - by MainMa

  Hi, I have a machine with Windows Server 2008. I want to change the hard disk drive, but keep everything else. I don't have a cd/dvd drive and don't want to buy it. My first idea was to make a byte-to-byte copy of the disk with Paragon Advanced Recovery. The problem is that when I try to boot from a new hard disk, it says that there were hardware changes and that Windows must be repaired, inviting me to insert the installation disk and follow repair instructions. I searched and found that 1:1 copy is not a correct way to do things. The correct one is to restore Windows to a new hard disk from a full system backup. But to restore, I need to have a dvd drive. I tried to make a copy of the Windows Server 2008 .iso on an USB flash drive, but the drive is not bootable (while the same procedure applied to Paragon Advanced Recovery ISO produces a bootable recovery USB flash drive). Now what else can I do (except buying a dvd drive)? Is there a way either to make Windows work without doing recovery or recover Windows 2008 without using a cd drive?

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• Netgear FVS336G: appropriate solution for today's small businesses?

  - by bwerks

  Hey all, I've been looking into a routers to facilitate a vpn solution for a small business. While the Netgear FVS336G looks good on paper, it appears to have some fairly crippling setbacks that drag down what appears to be some great hardware. First off, the unit has been around for a couple years now, perhaps before 64-bit operating systems were as common as they are now, and complaints are everywhere that claim that SSL or IPsec (or both) VPN connections will not work with 64-bit operating systems. However, most of these claims mention only Vista, which makes me think that these problems could have potentially been solved since then. Unfortunately though, Netgear's support forums seem to be incredibly private, and policed by some troll named jmizuguchi who just closes down public posts in order to marshal them into the private ones. Danger, will robinson. Apparently their firmware upgrade process is a nightmare too, but that's beside the point. My question is this: has anyone configured one a Netgear FVS336G to operate in a server 2008 (or R2)/windows 7 64-bit network? If so, is it possible to use the microsoft vpn client or are third party clients still required? If this thing has just failed the test of time, is there a feature-comparable unit that I've missed, at anywhere near the same price range? Thanks!

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• Green flickering pixels that move with black images

  - by user568458

  Strange question... Occasionally, on my LCD screen, pixels that should be black flicker rapidly and constantly between black and green, about 4 flickers a second. The crazy part is, unlike dead/stuck pixels, they are relative to content on the screen and move with it. For example, I might be looking at a web page with a picture that has lots of black. There might be a couple of green flashing pixels in that black that shouldn't be there. I scroll the page, and the green flickering pixels move with the image. It seems that everyphysical pixel is fine, but somehow something interprets part of the image in a way that causes flickering green... It's not just in a web browser. My first thought was to blame a trolling blogger cunningly uploading an animated gif that simulates a failing pixel... but it happens in a wide range of applications. It seems to occur randomly, other than that it seems to only occur in areas of pure black, and it's always pure 100% green. It happens rarely enough that it's not a big deal, but it's such a strange problem it bugs me. I can't find any info on anything like this. I'm not even sure if it's hardware or software. Any ideas? (windows 7 laptop connected to LCD by DVI to HDMI cable)

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• Are flash drives and hard drives thought of as "an ocean of bytes"?

  - by Jian Lin

  Why can a USB Flash drive be formatted as NTFS or FAT32? Is the USB Flash Drive and Hard Drive just to be thought of as "an ocean of bytes"? I get very used to hearing formatting a hard drive as FAT32 or NTFS, but we can also format a USB Flash drive as NTFS or FAT32? Is it because a hard drive or Flash drive both can be thought of as "an ocean of bits" or "an ocean of bytes"? I remember RAM as: it takes 16 bit or 32 bit as an address signal (the 16 or 32 copper footing on the circuit board), and give out 8 bit of data (the other 8 copper footing on the circuit board). So can a hard drive be thought of as working that way too? So that's why a Flash drive can be the same too? Just an "ocean of bytes". But is it true that hard drive's hardware make it an ocean of sector or something else, that is, the smaller unit of read / write is not byte but something else? So with this "ocean of bytes", NTFS has the format that says, "if the first byte is __, then it means __ (it is a file or folder, and link to which sector, indicated by byte 2 and 3, etc, etc)"

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• Network access lags for Win7 when server network utilization is high

  - by Jeff Miles

  We have a Dell PE2950 file server running Windows 2008, hosting a DFS namespace of ~1.2 TB. This server has two Broadcom 1Gbps NICs teamed together. When there is high traffic going to the server across the network (greater than 200 Mbps), any Windows 7 client accessing a DFS share at the time experiences severe performance problems. For example: Computer A has an AutoCAD drawing opened directly from the DFS share. Performance is normal, not causing any issues. Computer B begins a file transfer, putting a 11GB file onto a different DFS namespace, on the same server Computer A immediately notices lag while using AutoCAD. The cursor momentarily freezes within AutoCAD every 10 seconds or so, and any browsing of the DFS share is extremely slow. Computer B completes file transfer, and performance resumes to normal for Computer A. This is only affecting Windows 7 clients, using a variety of hardware (desktop + laptop). All of our Windows XP clients see no performance impact during the file transfer. Things I have tried with no change: Had Computer A work from an entirely different RAID array from the file transfer destination Updated NIC drivers on clients and server Enabled TCP offload and receive side scaling on the server NIC (previously disabled when the issue began) Antivirus disabled during file transfer I am currently having a user test applications other than AutoCAD when the file transfer occurs, and will update the question with that result. Does anyone have any recommendations for resolution or additional troubleshooting steps?

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• Server 2003 R2 - II6- granting access to website via IP with subnet range

  - by John

  We are trying to allow for a client to connect to our website. By default we are Denying all access except for those with the specified IPs we have configured to run, everything before has just been a single IP address. However now we must implement a range of IPs and rather than input thousands of records we want to use the group of computer options in the Grant Access page. However we have it configured to work off of the IP 72.21.192.0 with a subnet mask of 255.255.224.0 They are unable to connect. Looking over our IIS logs they are receiving a 302 error which is the same behavior anyone should get whom is unauthorized to view the page in question. The IP address coming in is 72.21.217.2, so it should be well within the rage of acceptable IP addresses. I'm at a loss as everything I look up tells me to do what we are doing. So any insight would be appreciated. Especially because I'm a software guy not hardware. Thanks!

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• Can a folder on a NAS be made available as a physical drive in VMWare?

  - by asbjornu

  We are currently in the process of moving from a single web server to two load balanced web servers and are facing some challenges we don't quite know how to fix. One of these is that the current single server hosts applications that write stuff to disk. The applications running on the server expects that when something is written to disk it later will in fact exist, so it's important that this premise is fulfilled with the dual server architecture as well. The dual server setup is a couple of VMWare instances with Windows Server 2008 R2 as the guest operating system. Out of the box, these instances does not share any kind of file system, so just moving the applications over would make them break since one instance would write something to the file system that doesn't exist on the other. Thus we need to share a file system between the two virtual servers. Our host has proposed to create a network share on a SAN and map this share individually on each virtual machine. This doesn't work too well due to NTFS permissions, etc., because the share needs to be accessed by several independent web applications that won't even be in the same application pool. The only solution that kind of works is to hard code an "identity" for each web application into its web.config file, but this means password in clear text which doesn't sit well with me. Since the servers are virtual, I'm thinknig: Wouldn't it be possible to make a NAS area available as a physical disk in the gues operating system somehow? Since VMWare has full control of the virtual hardware, you'd think it would be able to "fake" a local hard drive in the virtual machine that in reality is a folder on a NAS, but so far I haven't found anything that states how and if this is possible. So I have to ask the wonderful Server Fault community: Can a folder on a NAS be made available as a physical drive (typical D:) in both of the virtual machines?

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• windows 95 virtualization and CPU idle

  - by brtlvrs

  We are in the situation that we need to migrate our windows 95 systems (i know, that is so last century ). There is no hardware for a reasonable price available to run our windows 95 systems. So we are extending the overdue lifetime of it, by making them virtual. Now we see that VMware reports 100% CPU utilization of a windows 95 VM. This is because windows 95 doesn't know how to manage a CPU. For this reason software like rain or Waterfall, or CPUCool are introduced. The they are sending a HLT instruction to the CPU. This causes the CPU to halt and wait for new triggers to work. I've tested the mentioned programs in the VM, but they don't work, but generate errors. anyone has a valid workaround, solution ?? btw. I know that the best solutiuon is to replace the windows95 with windows XP. But in our situation that will take at least 5 years. Our windows 95 systems are running factory process control software.....

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• Transferring an SQL Processor License to a virtual hosted environment

  - by Andrew Shepherd

  My company is currently hosting a service in-house, and we want to move to an externally hosted environment. We would then be using a virtual server. I understand that this might be spread across multiple machines, but from my perspective as a customer, this layer is abstracted away - I shouldn't know or care about the hardware that the OS is hosted on. We have a licensed edition of SQL Server 2008. This is one Processor license. Will it be a violation of the licensing agreement to use this in a virtual environment. From the reference guide here it says When licensed Per Processor With Workgroup, Web, and Standard editions, for each server to which you have assigned the required number of per processor licenses, you may run, at any one time, any number of instances of the server software in physical and virtual operating system environments on the licensed server. However, the total number of physical and virtual processors used by those operating system environments cannot exceed the number of software licenses assigned to that server For enterprise edition there is an added option: if all physical processors in a machine have been licensed, then you may run unlimited instances of SQL server 2008 in one physical and an unlimited number of virtual operating environments on that same machine. I'm having trouble getting my head around this. Would I theoretically have to get a license for every processor in this virtual environment (which is effectively impossible because I have no way of knowing how many processors there actually are)? Or can I just say that it's hosted on one "virtual" server, so that's OK?

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• Desktop Provisioning for a Small Linux Software Development Team

  - by deakblue

  Goal: Get a small team using a standard development image rather than 4 software devs setting up their own environments. Why: it takes a day or days to install a distro, build-specific libraries, tools like editors and IDEs, mysql, couchdb, java, maven, python, android-sdk, etc. It's a giant PITA that when repeated 4 times by 4 developers (not sys admins) wastes time and generates annoying divergences that crop up later (it-builds-on-my-box syndrome). There's no sharing of productivity, settings, tricks, scripts, set-ups. Some of this is helped by segregating the build systems into headless virtualbox images. This doesn't really address tooling though or the GUI-desktop dev that needs doing. So I see three basic strategies, ghosting, virtualization, and finally creating a kind of in-house linux distro (I guess Google does something like this). The target dev environment is based on Debian OpenBox and must allow a mix of 3rd gen Core i7 notebooks 8GB-minimum to work both single and multihead. Important, the lappies are not the same, but a mix of 2012 macbooks and PCs. So: virtualization: is doing all of your work within a VM, like VirtualBox, practical on this hardware or annoying. ghosting: will laptops from different manufacturers make this impractical. DIY distro: short of scripting a bunch of package installs, I don't know if there's any "distro-maker" that could keep this from being an epic project of scripting package installs. So any advice?

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• Windows 7 BSOD on startup

  - by Cristy

  I got a BSOD today after getting home from 11 hours of work... It seems to work in SAFE MODE (sometimes, not always) The BSOD says: SYSTEM_SERVICE_EXCEPTION STOP: 0x0000003b WimFsf.sys - Address FFFFF88001A6B76B base at FFFFF88001A600000, DateStamp 4a5bc362. Sometimes it shows the welcome screen, shows the destkop for a few seconds and then BSODs Already did: unplugged all the USB devices reset the CMOS I haven't installed any new software recently. What should I do? EDIT: I've managed to get into safe mode and it seems to works fine. When I go into normal mode it shows the desktop then it freezes... Is it more likely to be a software or hardware problem? EDIT2: I've managed to get into normal mode by disabling all the non-microsoft services & startup programs. One more thing: When I shut down my PC, on the "Logging off" screen appear some artifacts. I don't think it's because of my graphics card cause I've opened Black OPS and it worked fine. It's so strange... It still BSODS on startup (but there a ~=10% that it will not), and when it doesn't BSOD's it works fine...

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• What should be monitored to troubleshoot file sharing problems?

  - by RyanW

  I'm running into some problems with a file share used by an ASP.NET web application. With this configuration, there are 2 web servers (win2k8 web) that connect to a file server (win2k8 enterprise), reading and writing files using a file share. Recently, one of the web servers has begun encountering an error accessing the file share: IOException: The specified network name is no longer available. There does not appear to be much info on the web for explaining what's causing this and how to best fix it, so I'm looking at what I can monitor in order to get clues. I'm not sure if it's hardware, just a load issue, file size, frequency, etc. With Windows perfmon, what can I monitor on the File Server side? There's the "Files Open" object, any other good ones? What can I monitor on the web server side? EDIT: I'll add that the UNC path uses the IP address of the file server, not a name to resolve. Also the share is a single, flat directory with over 100K files.

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• Windows 7 64 bit Installation freezes after a while durig the setup

  - by vinz243

  I have a windows 7 32 bits on my computer. Because i have 5 gb of ram (kingston) on my asus M2N motherboard and only 3 were able to be used, I bought W7 x64 and install it. It loads the wizard, but after a while, it freezes, and I have to force reboot. It first crashed while unzipping w7 files, but if I wait a while on the terms page for example, it can crash before, which make me think that it is a matter of time. I remember I had the same issue while booting on Ubuntu x64, it crashed randomly but not load completely. No bip or other messages. Configuration: Software OS (before) W7 x86 Pro New OS : W7 x64 Pro Antivirus : avast (bios verification ?) BIOS 03/27/2008 - v08.00.12 Hardware : Motherboard : Asus M2N Processor : AMD Athlon 64 dualcore @ 2.6 GHZ Memory : 5120 MB ((2 + 2) + (1)) NOTES : I ran a memory test using openSUSE cd, though i have not finished it, it ran. EDIT: I tried not to run the setup but wait, and i get the BSOD : A problem... TL;DW IRQL_NOT_LESS_OR_EQUAL If it is.. TL;DW ***STOP: 0x0000000A (0x0000000000000000,0x0000000000000002, 0x0000000000000001, 0xFFFFF8001A49ED1F)

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• How to configure a Linux kernel based on the modules currently in use?

  - by Carla

  Hello, I'm willing to build a minimal kernel with only the needed things for my machine; so I started by compiling the kernel from the ground up, using the default configuration and adding things that I know for sure I have (i.e.: Ethernet card, WiFi card, ...). But there are several other things not so easy to know about (i.e.: the watchdog timer) so I came across AutoKernConf which supposedly detects the hardware of the machine and generates a kernel configuration file with the settings for the found devices. The problem is it contained several settings repeated and even some which I don't have (I'm using a Dell laptop and one of the things it "found" was something of a Toshiba one). So I ended up building a kernel with the configuration that came out of the make allmodconfig command, which is a kernel with most of the things compiled as modules. Booting into that kernel and running lsmod I can see all of the kernel modules in use (the ones really needed) and I would like to know if there is a tool or some way for me to parse that list and convert it to the corresponding kernel configuration file. Or how to map each one with the appropriate options in the kernel so that I can manually set them. Thank you very much for your time.

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• debian 6 losing a large amount of packets

  - by Sc0rian

  I have a rather strange problem. We covered all the obvious hardware related issues (different nic, eth cable and switch) however I cannot seem to stop eth dropping packets. I have 4 servers all exactly the same. driver: e1000e version: 1.2.20-k2 firmware-version: 1.8-0 bus-info: 0000:06:00.0 They are all running the latest kernel(2.6.32-5-amd64). However they do this: RX packets:17073870634 errors:0 dropped:14147208 overruns:0 frame:0 another server: eth0 Link encap:Ethernet HWaddr e0:69:95:05:2f:cb inet addr:10.10.10.86 Bcast:10.10.10.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5455209277 errors:0 dropped:375445 overruns:0 frame:0 TX packets:3666134366 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:6688414486673 (6.0 TiB) TX bytes:1611812171539 (1.4 TiB) Interrupt:20 Memory:d0600000-d0620000 eth1 Link encap:Ethernet HWaddr 00:1b:21:b7:7a:ce inet addr:10.10.0.86 Bcast:10.10.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:15473695728 errors:0 dropped:5808325 overruns:0 frame:0 TX packets:20112364421 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:9192378766434 (8.3 TiB) TX bytes:20216368266761 (18.3 TiB) Interrupt:17 Memory:d0280000-d02a0000 A massive amount of dropped packets. I have tried to load on the latest driver, 1.9.5. This did nothing. I'm not sure what else to do.

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• Debian Bluetooth headphones not working

  - by cYrus

  Hardware Headphones Bluetooth dongle Maybe not exactly these models. Setup I tried to follow some guides, here's what I've done so far: Install software: sudo apt-get install bluez-utils bluez-alsa Reboot (just to be sure): $ dmesg | grep -i bluetooth [ 20.268212] Bluetooth: Core ver 2.16 [ 20.268230] Bluetooth: HCI device and connection manager initialized [ 20.268233] Bluetooth: HCI socket layer initialized [ 20.268235] Bluetooth: L2CAP socket layer initialized [ 20.268239] Bluetooth: SCO socket layer initialized [ 20.284685] Bluetooth: RFCOMM TTY layer initialized [ 20.284692] Bluetooth: RFCOMM socket layer initialized [ 20.284693] Bluetooth: RFCOMM ver 1.11 [ 20.335375] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 20.335378] Bluetooth: BNEP filters: protocol multicast The deamon is running: $ /etc/init.d/bluetooth status [ ok ] bluetooth is running. Plug the dongle: $ dmesg | tail [...] [23108.352034] usb 5-2: new full-speed USB device number 2 using ohci_hcd [23108.571131] usb 5-2: New USB device found, idVendor=0a12, idProduct=0001 [23108.571136] usb 5-2: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [23108.629042] usbcore: registered new interface driver btusb Put the headphones in pairing mode, and try scanning: $ hcitool scan Scanning ... Found nothing. What's next? What should I try? I'll update this answer as soon as you provide me hints.

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• Windows 8 x64 with VMWare Workstation or inside ESXi

  - by Dommer

  I need to run several virtual machines on a core i7-920 box with 12GB or RAM and a 256GB SSD to host the VMs. It also has a Highpoint RocketRaid 2720SGL RAID controller with a 12TB RAID 5 array. I want one of my VMs to run Windows 8 x64, to have access to the RAID array as a native disk (not as networked drives and it needs to run at full speed) and to be able to send files quickly across the network. Initially I thought I'd try to do this using ESXi 5, but I have been unable to find any working RAID drivers for the RR2720SGL and it is not on the HCL for ESXi 5. In light of this, I have installed Windows 8 x64 on the hardware and am thinking of installing VMWare Workstation and running my VMs inside there. I guess my questions are these: How does VMWare Workstation 9 perform compared to ESXi 5? In the real world I mean? Presumably installing Win 8 as the host OS will give me way better performance for that Win 8 machine than Win 8 running under ESXi? I should stick with Windows 8 x64 as the host OS, right? If I install a domain controller VM inside my Win 8 box and join the Win 8 machine to that domain, am I insane (I would guess the Win 8 machine wouldn't see the domain controller until it finished starting everything up, but I don't think that matters)?! is it feasible to give metrics like this and if so, what is the likely value of x? 25%? 50%? 75%? Win 8 under ESXi runs x% as fast as Win 8 installed bare metal.

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• Do eSATA HDD docking stations have a capacity limit?

  - by Michael Kjörling

  I'm looking at perhaps buying an eSATA docking station to be able to easily plug in and unplug hard disk drives, particularly but not necessarily only for backup purposes. Note: This is not a hardware shopping recommendation question. Please don't vote to close it as such. Looking at different models, I find for example this page detailing the Deltaco SI-7908SUS which specifically states "storage capacity: 1.5 TB" as well as "pictured hard disk not included, only for illustration". A customer review specifically mentions that it does not work with 3 TB drives, although does not go into any detail such as OS, drive model, etc. From a brief glance, the vendor's web site does not appear to say either way. Then there is the quite similar Deltaco SI-7908B3 which boasts on the box "all 2.5" and 3.5" HDD/SSD compatible". My question is: Why would what basically amounts to a SATA/eSATA adapter have any say in what storage capacity devices are supported? Does it? Assuming the OS supports the full capacity of the drive, why should introducing another (not even a different, really) connector change anything? Bonus question: Might it make a difference if the docking station exposes multiple interfaces (such as in the case of for example the SI-7908SUS exposing USB 2.0 and eSATA)? (I still think it shouldn't, but it'd be nice to have it confirmed.)

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• Outbound mail issue during Exchange 2003 migration

  - by user27574

  Dear all, I am having an outbound email issue during the Exch 03 migration. Basically, we are migrating Exch03 to new hardware, both servers are Server 03 based. Everything runs smooth while setting up and installing Exch 03 on the new box. Public folders are all replicated. My issues are shown below.... 1) After starting to move users' mailboxes to new Exch 03, they receive some undeliverable mail and bounced back mail from some vendors, then I move few users back to test around, they have no problem at all after moving back to old Exch 03. 2) Another issue is our company has Blackberry users, we don't have BES. Under each user's mailboxes, we have forward rule setup, so that both user inbox and BB can receive email. User who is moved to the new Exch 03 server, they can only send email to the BB user's inbox, mail cannot be forwarded to BB at all, smtp queue stacks up and keep trying until the time is expired. Since not all emails that the users send out from the new Exch have problem, I am not able to narrow down what is the issue here. Can anyone give me some ideas? Could this be MX record / Reversed DNS relate? Or firewall NAT rule setting? Thanks.

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• Why does Internet Explorer sometimes fail to connect to anything until I restart it?

  - by cletus

  IE has an annoying problem on my PC (XP SP3). I start it and try to go to Google (for example) and it'll sit there saying "Connecting" but nothing will happen and it doesn't matter how many times I try, it won't connect to anything. I discovered that if I kill IE and restart it then it might start working (and then it'll work every time). It might takes 3-4 restarts (of IE, not the PC) to get a working IE. Now I wouldn't normally care about this since I use Chrome but a lot of things use IE by default like Windows Update and the online help in Office 2003 so I would like to fix it. Interestingly, my work laptop, which is running Windows 7 RC 64-bit, has exactly the same problem (completely different network and everything). I'm utterly convinced it's not a network or hardware problem but some software problem. Edit: More info. It's IE8; No add-ons; Automatically detect settings is not enabled. It is set to "Never dial a connection".

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• Getting 0xc00000e windows 7 "Boot device inaccessible" after random crashes

  - by Dynde

  I've been having some weird random crashes that I can't seem to locate, and I'm unsure if it's windows or hardware related. It's a brand new computer and very powerful. I've run into a couple of these random crashes, now I don't know what causes them, as it happens during the night, when I'm sleeping. When I wake up, all I see is a boot manager screen that says Exception: 0xc00000e "Boot device inaccessible". A simple restart doesn't fix the problem - it seems to struggle locating my primary hdd - but a complete shutdown works, it'll just fly straight into windows again. The event viewer doesn't tell me much. The most reason incident just gives me this: "The previous system shutdown at 08:55:44 on ?11-?12-?2011 was unexpected." And also a kernel power event: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly. and I can see only two application event entries around that time at 8.47 (about 8 minutes prior to the crash): The Windows Modules Installer service entered the running state. The WinHTTP Web Proxy Auto-Discovery Service service entered the running state. Can anyone tell me anything about this, or direct me to a forum or something that might know what's wrong? I can supply the extra details of the events too if needed. The hdd is an SSD - could that have anything to do with it? I ran a few diagnostics and memory and hdd should be okay - at least the diagnostics report is clean. Is it a faulty drive?

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• Best all in one linux based proxy,firewall, dhcp and wins server.

  - by BeStRaFe

  I help to run a lan in Sydney. We have a need for a proxy/gateway solution to allow those pesky games that require internet to work. I have been doing this with an ISA server and it has worked quite well. However now i wish to port this over to run on the same hardware as our cacti / nagios box under a vmware VM. ISA server is horridly nad due to the massive ram and i/o requirement for something is basically port blocking and handing out IP's. The needs are as follows. 1. DHCP 2. WINS (otherwise network devices fight over who is the WINS master) 3. Filtering based in PORT for outbound traffic. 4. Ability to whitelist IP/MAC's for internet access. 5. Web Interface. I had been thinking to use PFSENSE however there is no option for a WINS server and i cbf working my way around bsd.

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• How to determine the root cause of a system lockup on Ubuntu 8.04 LTS?

  - by jdt141

  I'm currently working a project that involves setting up a PC/104 stack and running Ubuntu 8.04 LTS. We need to use the PC/104 stack because its an embedded application - and we're required to use a DeviceNet peripheral card to communicate to other devices. (DeviceNet is just a protocol on top of CAN.) Anyway, the following hardware is on the stack: Kontron MOPSPM104 with a 1GHz Intel Celeron processor ConnectTech FlashDrive/104 4GB Industrial Temp (-40 to +85 C) Woodhead (Molex) PC104DVNIO DeviceNet card A run of the mill 104 power supply The Kontron Board offers two serial ports, one VGA out, and two USB ports. The DeviceNet card is an ISA card. Because of this (per the User's Guide for the Kontron Board), I have manually set the IRQs in the BIOS to be appropriately configured, and turned off ACPI in both the BIOS and passed the appropriate flag in GRUB. I've installed Ubuntu 8.04 desktop, 32 bit. The problem that I'm having is that, from time to time, the entire 104 stack locks up. This only seems to happen in two cases, both of which we're running GNOME. We have a custom application that uses the DeviceNet card, and the system will lock up, or (more frequently) when we're running Firefox and either surfing for some information or trying to test it - typically by streaming video from a IP-camera. The reason I ask this questions is I cannot determine the root cause of this lockup. The IRQs appear to correctly configured in the BIOS and as the Kernel sees them, and nothing is logged to dmesg. If you all could help me determine the root cause of this lockup, I would greatly appreciate it. Thanks.

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• SSH Interactive mode not working

  - by Ekin Koc

  I have a Debian based linux server running for a year or so, without any problems. A couple of days ago, ssh interactive mode stopped working for no reason. I mean, I can open an ssh connection just fine, the server greets me with shell but I just can't type anything. However, if I send commands like this: ssh [email protected] cat /var/log/messages, I get the response. I dug through several logs and found one message, which feels remotely relevant to the problem; sh kernel: [10222733.062511] ------------[ cut here ]------------ sh kernel: [10222733.062522] WARNING: at /build/buildd-linux-2.6_2.6.32-39-amd64-7yVIH2/linux-2.6-2.6.32/debian/build/source_amd64_none/drivers/char/tty_ldisc.c:738 tty_ldisc_reinit+0x46/0x7b() sh kernel: [10222733.062526] Hardware name: PowerEdge R210 II sh kernel: [10222733.062528] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables x_tables sha1_generic arc4 ecb ppp_mppe ppp_async crc_ccitt ppp_generic slhc loop snd_pcm snd_timer snd soundcore snd_page_alloc i2c_i801 i2c_core pcspkr evdev joydev dcdbas container button processor ext3 jbd mbcache sg sd_mod sr_mod crc_t10dif cdrom usb_storage usbhid hid mpt2sas ahci ehci_hcd libata scsi_transport_sas usbcore bnx2 nls_base scsi_mod fan thermal thermal_sys [last unloaded: scsi_wait_scan] sh kernel: [10222733.062568] Pid: 8662, comm: sshd Not tainted 2.6.32-5-amd64 #1 sh kernel: [10222733.062569] Call Trace: sh kernel: [10222733.062572] [<ffffffff811ff056>] ? tty_ldisc_reinit+0x46/0x7b sh kernel: [10222733.062574] [<ffffffff811ff056>] ? tty_ldisc_reinit+0x46/0x7b Is there any way to get back the sshd working in interactive mode? I tried restarting sshd but that is no help. And somehow, I can not reboot the server. Tried sending shutdown -r now and reboot but it refuses to go down. Should I go ahead and request a physical reboot?

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• Join multiple filesystems (on multiple computers) into one big volume

  - by jm666

  Scenario: Have 10 computers, each have 12x2TB HDDs (currently) in raidZ2 (10+2) configuration, so, in the each computer i have one approx. 20TB volume. Now, need those 10 separate computers (separate raid groups) join into one big volume. What is the recommended solution? I'm thinking about the FCoE (10GB ethernet). So, buying into each computer FCoE (10GB ethernet card) and - what need more on the hardware side? (probably another computer, FCoE switch? like Cisco Nexus?) The main question is: what need to install and configure on each computer? Currently they have freebsd/raidz2, but it is possible change it into Linux/Solaris if needed. Any helpful resource what talking about how to build a big volumes from smaller raid-groups (on the software side) is very welcomed. So, what OS, what filesystem, what software - etc. In short: want get one approx. 200TB storage (in one filesystem) from already existing computers/storage. Don't need fast writes, but need good performance on reading data. (as a big fileserver), what will works transparently, so when storing data don't want care about onto what computer the data goes. (e.g. not 10 mountpoints - but one big logical filesystem). Thanks.

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