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  • howto plan RAID for ESX

    - by maruti
    eight 300GB SAS drives are available. Can ESX be put on one disk as RAID-0 and others as RAID-5 ? so that in the event of disk failure data (VMs) are safe. if os disk RAID-0 fails could that be installed on replacement disk and still be able to keep VMs running? if not RAID-1 for OS is only option for OS disk? please suggest any other RAID options.

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  • Multiple nt52 entries in bootmgr

    - by SLaks
    I have a machine with Windows XP, Server 2003 R2, and Server 2008 R2. Right now, bootmgr has one entry for Server 2008 R2 and one entry for ntldr, which then leads to the ntldr boot.ini menu. Is it possible to add two different nt52 entries on two partitions so that I can access all three OSes from the bootmgr menu? Right now, Server 2008 and XP are in logical drives on an extended partition, but (I assume) I can image them onto basic partitions if necessary.

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  • Backing up the master boot

    - by petersohn
    I want to back up the master boot on my hard drive, in case something screws it up. What software do you recommend for this? My first idea is to boot from a Linux CD and dd the first 512 bytes of /dev/sda, and dd it back to recover. Will this solution work, and is it safe?

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  • External hard drive that gets its power supply from the PC.

    - by AngryHacker
    I need an external drive to connect to my MacMini. I've been using an 80gb 2.5 drive in an enclosure and it's fine, but now I need a 1.5TB drive. Unfortunately all the 1.5TB drives I found need a separate power supply. I'd like it to be able to feed its power off the USB drive (just like my 80gb drive does). Does something like that exists?

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  • IIS Home Directory path drive letters got changed on all my sites?

    - by Max Fraser
    Today in IIS I came into my server and all of my drive letters were changed from D: to E:? Hacked I guess? Anyone ever have this happen to them? Windows 2003 Server, only 2 drives in the Machine C:, D:. I have not touched the machine and the Drive Letter itself did not change just the setting in IIS for site Home Directory that point to it. IE: D:\websites\mywebsite.com was changed to E:\websites\mywebsite.com

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  • linux: automount internal hard drive during boot?

    - by John Doe
    i try to create my own NAS and i need to automount the internal sata disks during boot i know i could do using fstab but im searching for a more easy/generalized way so its easier to scale with less handwork needed for every hard drive attached (or every mainboard added to the cluster) so anyone knows how to automount internal disks without using fstab like ubuntu does for usb drives? im using ubuntu server 9.10 thx all

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  • Preinstalled Windows 8 and Linux UEFI dual boot on a laptop

    - by itchy355
    I am trying to set up Windows 8 and Arch Linux on a new Sony Vaio E14 with preinstalled windows 8. So far: installed W8 to my new SSD (switched for the original HDD) using Recovery Media shrunk the W8 partition, deleted recovery partition, disabled swap confirmed W8 booting just fine On to Arch: disabled Secure Boot in bios confirmed W8 booting just fine Booted Arch off the CD and installed everything to 4th and 5th partition set up rEFInd for EFIstub kernel bootloader After that it got worse. I was unable to boot anything else than Windows 8 (although I was glad that they at least kept working just fine). Tried: creating EFI\refind\ and putting the .efi there (as per Arch manual overwriting EFI\boot\bootx64.efi overwriting EFI\Microsoft\Boot\bootmgr.efi overwriting EFI\Microsoft\Boot\bootmgfw.efi --- YAY rEFInd shown up! So far, so good. I've kept the whole W8 Boot\ directory in EFI\windows8 and set up a boot menuentry for it; and it booted just fine. But, upon restart, everything was wrong -- 'Operating system not found' instead of any bootloader (refind or w8). Booted back into Arch using the live CD to find out that the EFI partition had erroneous FAT table. fsck.vfat fixed it, and I've found that EFI\Microsoft\Boot was back to it's original state (all refind files deleted and replaced with W8 bootloaders). I've overwritten them again and got back to rEFInd showing up correctly and Arch being perfectly bootable. After that I've tried only renaming EFI\Microsoft\Boot\bootmgfw.efi to bootmgfw.001.efi (then copying refind's .efi to bootmgfw.efi and keeping EVERY OTHER file as it was), but with exactly the same result. Tried marking the GPT EFI partition as read-only, same result. Now I'm kinda out of luck. Arch boots fine, so does W8 but it destroys the EFI partition in the process. Thanks for any ideas, Googling brought me this far and I can't find any better. PS -- windows 8 MAYBE destroys the partition upon shutdown -- when I order a shutdown in W8, it takes unusually long (about half a minute instead of ~5 seconds). So in theory I could solve this by hard-resetting the laptop instead of a normal shutdown, but that's just not nice.

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  • Linux RAID-0 performance doesn't scale up over 1 GB/s

    - by wazoox
    I have trouble getting the max throughput out of my setup. The hardware is as follow : dual Quad-Core AMD Opteron(tm) Processor 2376 16 GB DDR2 ECC RAM dual Adaptec 52245 RAID controllers 48 1 TB SATA drives set up as 2 RAID-6 arrays (256KB stripe) + spares. Software : Plain vanilla 2.6.32.25 kernel, compiled for AMD-64, optimized for NUMA; Debian Lenny userland. benchmarks run : disktest, bonnie++, dd, etc. All give the same results. No discrepancy here. io scheduler used : noop. Yeah, no trick here. Up until now I basically assumed that striping (RAID 0) several physical devices should augment performance roughly linearly. However this is not the case here : each RAID array achieves about 780 MB/s write, sustained, and 1 GB/s read, sustained. writing to both RAID arrays simultaneously with two different processes gives 750 + 750 MB/s, and reading from both gives 1 + 1 GB/s. however when I stripe both arrays together, using either mdadm or lvm, the performance is about 850 MB/s writing and 1.4 GB/s reading. at least 30% less than expected! running two parallel writer or reader processes against the striped arrays doesn't enhance the figures, in fact it degrades performance even further. So what's happening here? Basically I ruled out bus or memory contention, because when I run dd on both drives simultaneously, aggregate write speed actually reach 1.5 GB/s and reading speed tops 2 GB/s. So it's not the PCIe bus. I suppose it's not the RAM. It's not the filesystem, because I get exactly the same numbers benchmarking against the raw device or using XFS. And I also get exactly the same performance using either LVM striping and md striping. What's wrong? What's preventing a process from going up to the max possible throughput? Is Linux striping defective? What other tests could I run?

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  • Snow Leopard not reading NTFS

    - by dtmunir
    I just upgraded a brand new Macbook Pro that I bought with 10.5 installed to Snow Leopard. After doing the upgrade I am trying to access NTFS partitions on my external hard drive but they are just not showing up. I went ahead and installed Windows 7 using Parallels, and I can access the NTFS partitions from within Windows, but not from Mac OS X. I know that Snow Leopard should be able to at least read NTFS drives, so what is going on here?

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  • Trying to upgrade SQL Server 2008 to R2 but SQL is sleeping or dead?

    - by oJM86o
    I've used the option to upgrade SQL Server 2008 to R2 but I noticed it gets to about 20-30% and it just sits on this screen: I've left it alone for over 2 hours, the PC is definately not frozen cause I can click the help or move the window around but it says "Install_sql_common_core_loc_Cpu64_1033_action: Install Files. Copying new files" for the past 2 hours. I have tried to do the install from a CD as well as a network drive, both with the same issue. Is there anything I can check or do ?

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  • macosx not recognizing held down keys on boot

    - by Jonathan Mayhak
    I'm running fully updated snow leapord on a new model imac. I am unable to boot into macosx. I do have build 7600 of windows 7 that the computer will automatically boot to. I do not have the bootcamp manager on windows 7. The computer is not recognizing any held down keys when I try to either boot from cd or force macosx boot or anything. How can I get the computer to load up osx?

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  • RAID 50 24Port Fast Writes Slow Reads - Ubuntu

    - by James
    What is going on here?! I am baffled. serveradmin@FILESERVER:/Volumes/MercuryInternal/test$ sudo dd if=/dev/zero of=/Volumes/MercuryInternal/test/test.fs bs=4096k count=10000 10000+0 records in 10000+0 records out 41943040000 bytes (42 GB) copied, 57.0948 s, 735 MB/s serveradmin@FILESERVER:/Volumes/MercuryInternal/test$ sudo dd if=/Volumes/MercuryInternal/test/test.fs of=/dev/null bs=4096k count=10000 10000+0 records in 10000+0 records out 41943040000 bytes (42 GB) copied, 116.189 s, 361 MB/s OF NOTE: My RAID50 is 3 sets of 8 disks. - This might not be the best config for SPEED. OS: Ubuntu 12.04.1 x64 Hardware Raid: RocketRaid 2782 - 24 Port Controller HardDriveType: Seagate Barracuda ES.2 1TB Drivers: v1.1 Open Source Linux Drivers. So 24 x 1TB drives, partitioned using parted. Filesystem is ext4. I/O scheduler WAS noop but have changed it to deadline with no seemingly performance benefit/cost. serveradmin@FILESERVER:/Volumes/MercuryInternal/test$ sudo gdisk -l /dev/sdb GPT fdisk (gdisk) version 0.8.1 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Disk /dev/sdb: 41020686336 sectors, 19.1 TiB Logical sector size: 512 bytes Disk identifier (GUID): 95045EC6-6EAF-4072-9969-AC46A32E38C8 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 41020686302 Partitions will be aligned on 2048-sector boundaries Total free space is 5062589 sectors (2.4 GiB) Number Start (sector) End (sector) Size Code Name 1 2048 41015625727 19.1 TiB 0700 primary To me this should be working fine. I can't think of anything that would be causing this other then fundamental driver errors? I can't seem to get much/if any higher then the 361MB a second, is this hitting the "SATA2" link speed, which it shouldn't given it is a PCIe2.0 card. Or maybe some cacheing quirk - I do have Write Back enabled. Does anyone have any suggestions? Tests for me to perform? Or if you require more information, I am happy to provide it! This is a video fileserver for editing machines, so we have a preference for FAST reads over writes. I was just expected more from RAID 50 and 24 drives together... EDIT: (hdparm results) serveradmin@FILESERVER:/Volumes/MercuryInternal$ sudo hdparm -Tt /dev/sdb /dev/sdb: Timing cached reads: 17458 MB in 2.00 seconds = 8735.50 MB/sec Timing buffered disk reads: 884 MB in 3.00 seconds = 294.32 MB/sec EDIT2: (config details) Also, I am using a RAID block size of 256K. I was told a larger block size is better for larger (in my case large video) files. EDIT3: (Bonnie++ Results. Would love some guidance with this!)

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  • Install Windows 7 over Windows XP - Permissions

    - by andreas
    Hello, i want to install Windows 7 in a workstation where windows xp is currently installed. The system has 2 hard drives with 5 partitions and there are permissions on folders on different partitions. After the installation of Windows 7 will these permissions be visible? Will the permissions be lost? Will i have to re-gain control over the folders in these partitions? Thanks,

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  • SUBST for OSX? Error when trying to map local folder as network drive on Mac OSX 10.9

    - by Taylor Wright
    I would like to map a local folder as a drive (similar to Window's SUBST). One solution I found was to map a shared folder, but I get the following error when using a local folder: There was a problem connecting to the server “MyDrive.local”. This file server is available on your computer. Access the volumes and files locally. I was using this guide: Mapping Drives (Shared Folders) on Mac OS X

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  • Rocketfish Driver

    - by darthg8r
    I've got a RocketFish SATA enclosure, model number RF-AHD35. It has a card reader on it. Windows doesn't see the card reader. I figure it's a driver problem. But, I don't have the CD that came with it anymore, nor is it available from their site. As a matter of fact, their site looks like my 8 year old made it. Does anyone have access to this driver?

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  • Run script when a specific disk/memory card is mounted under OSX

    - by Max Rydahl Andersen
    How do I run a script when a drive is mounted under OSX ? My usecase is that I would like to automatically copy images from my USB memory/harddrive when it is inserted in my USB card reader, and when a DVD or CD is inserted I would like to copy it for storage in my media center. I've tried using Marcopolo but from what I can see it can only detect the presence of a certain USB device, not the presence of specific harddrive. (http://superuser.com/questions/65127/is-it-possible-to-run-an-automator-workflow-when-a-usb-device-is-connected)

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  • certain thumbdrives keep a system from going out of the boot screen

    - by The Journeyman geek
    I have an old r51 which i boot off usb. Apparently, if i have a toshiba 2gb thumbdrive similar to this plugged in, or an old imation 1gb drive plugged in, it won't boot at all- it freezes in the bios loading screen until its unplugged. I need to try it on another system but i'm wondering what could be causing it- since i suppose this is at a lower level than filesystem, and the drives work fine otherwise - even being readable if inserted after the system is booted from another source, with neither drive plugged in

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  • Extra Volumes appearing after using MyDefrag

    - by user17381
    Hi, After using MyDefrag, when I start the defrag again, two new drives have appeared - with very odd names. They are both named the same thing: \\?\Volume{WhatLooksLikeAGUID} Note the Guid (and hence the drive names) are both the same - any idea whats going on here? Thanks. OS: Windows XP Pro SP2.

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  • Merging free space of hard drive to primary partition

    - by Dibya Ranjan
    I have purchased a new HDD, I tried to format making 1 primary partition, I converted the rest unallocated space to extended partition then to logical drive now I have 3 logical drives. I feel that the size allocated to the primary partition is less so I used shrink option to the 3 logical partitions in diskmgmt but each partition is resulting in one memory block of Free space. Now I want to merge these free spaces to my primary partition.

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  • Group Policy Trust Problem

    - by Scott
    Hi, I've setup a new group policy for our windows XP users but now when they run a link to a program they get a trust box which they have to click 'run' on. I think its a trusted locations thing ie, mapped drives, etc. Is there a quick way to stop this happening ? Any help would be very much appreciated. Regards Scott

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