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• question about a sata read/write speed

  - by Joe

  I'm contemplating biting the bullet for an ssd drive in a server, obviously I know it will be MUCH faster than a regular 7200rpm sata2 3gbps drive. The nice thing about ssd's is often they post the read/write speed but that info isn't available for sata's so I'm just curious to know what a typical read/write speed would be for a seagate 120gb 7200rpm drive. I know it fluctuates from manufacturer and model series but I'm just looking for a guestimate.

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• Standalone tool to synchronize two folders in windows?

  - by Jim

  I keep data on a USB drive, but I also keep a copy of all of that data on a hard disk. I like using the hard disk because it's faster and gives me a backup. What standalone tools would work to keep the files on the disk and USB drive in sync? I'd like a single command line executable or standalone GUI app that can do the job--something I could run off of the USB drive. So, things like the MS Sync Tool wouldn't work.

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• RAID 1 Mirror Error with Two Western Digital 500GB Drives

  - by bm678

  I have Windows 7 Ultimate 64 bit installed on a Western Digital 500GB drive (WD5000BEVT-22ZAT0) that was partitioned automatically by Windows as 100MB System Reserved and 465.66GB drive C. There is also an unallocated second Western Digital 500GB drive (WD5000BPVT-22HXZT1) that I want to use for RAID 1 to mirror the first drive but I get an error message stating “ALL DISKS HOLDING EXTENTS FOR A GIVEN VOLUME MUST HAVE THE SAME SECTOR SIZE, AND THE SECTOR SIZE MUST BE VALID.” I uninstalled Windows patch KB-982018 but I still get the same error message. Could you please let me know how to resolve this? Thanks.

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• Partition is missing in /dev

  - by haimg

  I'm having a strange problem since I moved from Centos5 to Centos6. I have three disks, first two are used as a RAID1, and third one is a stand-alone backup disk that is not listed in /etc/fstab (it is mounded when needed and then unmounted). My problem: After a boot, /dev/sdc exists but /dev/sdc1 does not. Also, the links in /dev/disks are also absent for the first partition of sdc. Disk itself is fine, and if I hot-remove it and plug it back in, /dev/sdc1 appears ok and everything is working. My question: What subsystem manages auto-discovery of disks, partitions, etc. during the boot process (e.g. what creates /dev/disks/by-label)? How do I configure it to scan /dev/sdc too and create all relevant files and links in /dev ? Edit: Here's the relevant part of dmesg output (the only place sdc appears). It does list sdc1, but it's not in /dev! sd 1:0:0:0: [sdb] 1953525168 512-byte logical blocks: (1.00 TB/931 GiB) sd 3:0:0:0: [sdc] 976773168 512-byte logical blocks: (500 GB/465 GiB) sd 1:0:0:0: [sdb] Write Protect is off sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00 sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 3:0:0:0: [sdc] Write Protect is off sd 3:0:0:0: [sdc] Mode Sense: 00 3a 00 00 sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sdb: sdc: sd 0:0:0:0: [sda] 1953525168 512-byte logical blocks: (1.00 TB/931 GiB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sda: DMAR:[DMA Read] Request device [00:1e.0] fault addr 361bc000 DMAR:[fault reason 06] PTE Read access is not set sdb1 sdb2 sdb3 sdc1 sda1 sd 1:0:0:0: [sdb] Attached SCSI disk sd 3:0:0:0: [sdc] Attached SCSI disk sda2 sda3 sd 0:0:0:0: [sda] Attached SCSI disk

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• DRBD as a block device for XEN VM (Centos 5.3)

  - by SaberTooth

  Hi all, I have setup a drbd resource between 2 server nodes - everything works correctly when doing sync tests between the two. (I want to create a HA cluster using drbd,xen and heartbeat) However, when I try and create a XEN VM with Centos as guest operating system, I get through to the partitioning screen on the install but when I select a partitioning type the next screen gives me the following error : "An error has occurred - no valid devices were found on which to create new file systems. Please check your hardware for the cause of this problem." This is the first time attempting create a setup like this and searching Google does not help much... my config files for DRBD and XEN.... DRBD (just the section that is pertinent) on xennode0 { device /dev/drbd0; disk /dev/sda5; address X.X.X.X:7788; flexible-meta-disk internal; } on xennode1 { device /dev/drbd0; disk /dev/sda5; address X.X.X.X:7788; meta-disk internal; } XEN kernel = "/boot/xeninstall/vmlinuz" ramdisk = "/boot/xeninstall/initrd.img" extra = "text" name = "VM" maxmem = 3000 memory = 3000 vcpus = 4 on_poweroff = "destroy" on_reboot = "restart" on_crash = "restart" vfb = [ ] disk = [ "phy:/dev/drbd0,sda1,w", "tap:aio:/srv/xen/xenswap.img,sda2,w" ] vif = [ "mac=00:16:3e:11:67:ae,bridge=xenbr0" ] root = "/dev/sda1 ro" Thanks in advance!

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• Raid5 is off on my Lefthand P4500

  - by Soeren

  I have 1 cluster with serveral p4500. There is HW Raid5 and the Raid5 is split on: first 6 is one raid 5, and the other 6 is one raid 5. There were two disk that came up with a fault. I replaced both disk in same Raid5. Now the storagesystem says that Volumes is unaccessable and the Raid5 of the P4500 is down. How can I get the lefthand up and working again? Ive tried to put the old disk in the P4500 again, but this does not help. I also tryed to restart the disk shelf as well. Do you have any idea? Or something to get it to work again?

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• Future raid update in a NAS and HP ProLiant alternatives

  - by edwardmlyte

  I'm thinking of buying the HP ProLiant MicroServer*. My question is if I just put a single 2TB drive, how easy would it be in the future to upgrade to a second 2TB drive in a RAID-1 setup? Can this be done without formatting the original 2TB drive? *It looks like the £100 cashback offer is stopping end of Aug, making this system cost around £260 without HDDs. Are there any other brands that anyone would recommend for all-in-one hardware solutions.

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• Live Messenger SimilarityTable2 file

  - by adrianbanks

  I am trying to free up some space on my laptop's hard disk and am using a tool (SpaceMonger) that will show me a treemap of the whole disk. The problem I have comes from Live Messenger's SimilarityTable2 file. I have no idea what it is for, but I know that it is a sparse file, meaning that it shows as taking up 8GB of disk space, but actually only takes up 132KB of space on disk. The problem is that because SpaceMonger thinks this file is 8GB, it swamps the other files and takes up most of the treemap, making it hard to see the other files that really are large. Is this file safe to delete? If not, how do I make its actual size on disk match its reserved size? If that's not possible, how can I make SpaceMonger (or another treemap tool) use the real size of the file and not the reserved size? EDIT: I've just realised that I have some NTFS junctions set up, meaning that the same set of directories appear twice. Is there any way to stop this happening as well?

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• WD Passport Won't Mount

  - by Scott7278

  My WD Passport won't mount. However, it turns on when plugged into my macbook and doesn't make any strange noises. It took a small fall (just a few inches and it was on my couch) and I'm very concerned about physical damage. When I open up disk utility it shows the root 500 GB WD My Passport drive which seems to be OK when I verify it and repair it. However, the "External Hard Drive", the directory underneath the "500 GB WD My Passport drive" is grayed out. When I verify the External Hard Drive it says it needs to be rapaired. When I try and repair it it gives me the following message and does not seem to progress: "Updating boot support partitions for the volume as required." Is there hope for me recovering my data? I stupidly have important data on it that I don't have anywhere else.

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• My pendrive is not working and showing Unknown file System

  - by Debabratta

  I have a pendrive when I insert it into one o my port it shows in the My Computer but when I try to explore, it shows please insert a disk into drive H. However my usb drive is well inserted. I tried to format it but it is showing There is no disk in drive H, Insert a disk then try again. Its properties is showing Unknown File System and the used space and free space part showing 0 bytes. I cann't also check for errors in the drive. Its device status:The device is working properly. I also reinstalled the driver but that did not help me. Please suggest some way to recover the issue. Thanks.

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• How can I recover my Transcend pendrive when both the used space and free space are 0 bytes?

  - by Debabratta

  I have an Transcend pendrive, and when I connect it and double click it to explore, it is showing the error: Please insert a disk into drive Also In the properties field it is showing File system- Unknown Used space- 0 bytes free space- 0 bytes capacity- 0 bytes I tried to format it using using the command prompt but it is not showing in the list disk command. It is also not showing in the Disk Management.

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• Unable to use cloned VM, OpenSUSE, VirtualBox

  - by Kremchik

  I've cloned a VM and now while booting it I see a message: Trying manual resume from /dev/sda1 Invoking userspace resume from /dev/sda1 resume: libgcrypt version: 1.5.0 Trying manual resume from /dev/sda1 invoking in-kernel resume from /dev/sda1 Waiting for device /dev/disk/by-id/ata-VBOX_HARDDISK_.....-part2 to appear: ... Could not find /dev/disk/...-part2 Want me to fall back to /dev/disk/...-part2 (Y/n) If I press 'Y' it tries to boot again with failure, then exits to /bin/sh. If I press 'n' it exits to /bin/sh immediately. I've read a solution here: http://diggerpage.blogspot.com/2011/11/cannot-boot-opensuse-12-after-cloning.html but I don't understand how to access files on disk to edit /etc/fstab and /boot/grub/menu.lst?

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• Mac OS X - Time Machine backup fails verification - What can I do to save the history?

  - by usermac75

  Hi, How do I make Time Machine to make a new complete backup without losing older versions of backed up files? Verbose: I am using the Time Machine backup on my OS X (Snow Leopard) to backup the whole computer to an external drive. I especially like the "history", i.e. the feature that allows you to restore the older version of a file. Problem: I had some data corruption on my external backup drive, I repaired it with the System Tool for doing that, it found some faults. I had the disk tool repair the external drive. After that, the external drive was OK and I could use Time Machine again. I let Time Machine do one more backup. Now I made a verification according to http://superuser.com/questions/47628/verifying-time-machine-backups, namely along sudo diff -qr . $HOME/Desktop 2>&1 | tee $HOME/timemachine-diff.log However: After doing the command above, several differences and missing files were reported, approx. 200 files in sum. Whereas some of the missing files were cache or excluded directories, the differences do bother me, especially as some important documents from me are listed as differing. How can I make sure that the data on the external drive is synced correctly? Is it possible to have Time Machine to do a complete new backup without losing the history? Or to have Time Machine compare all files for differences and re-write all files that are different? Or can I set some flags on the files that do not match to have them copied again? (like the archive-flag in Windows/Dos). I'd rather not touch the files because I would like to keep the date of last change/date of creation) Thank you for your thoughts!

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• Installing windows xp from a removable storage

  - by objectiveME

  Hello,i want to install windows xp from my flash disk but upon running DISKPART and LIST PART my flash disk is not being listed.I soon find out its not supported on another forum.I tried unet bootin but i dont want to go that route.I have learn't that i can make my flash disk appear a hard drive but i am not sure since i have never done this before. I am following this tutorial: http://www.intowindows.com/how-to-install-windows-7-rc-on-acer-aspire-one-netbook/ If i present a usb stick as a hard drive,will i be able to install xp now?.

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• RAID 1 after install and two controlers

  - by jfreak53

  I have question regarding RAID 1. Can I setup software RAID 1 after having installed the first drive and setup ubuntu 12? I know that during server install and partitioning I can select RAID and setup then, but what I am not clear on is how in the world to setup RAID 1 after the fact? Can someone provide directions for this? Also, can I RAID 1 two drives one being 500GB and the mirror drive being 1TB? Of course the mirror drive would have a 500GB partition but that's my point. Lastly, can one drive be on IDE and the other on a SATA controller? I know speed will be an issue, that doesn't matter, I just need to know if it will work without corrupting data and if it's the same process? Thanks.

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• raid 0 failure, drives look fine

  - by Alan

  Hello, after a lovely blue screen my vista 64 machine decided to reconfigure one of my drives to no longer be part of my raid volume. So now my raid fails as it only has one member disk. This happened to me about 6 months ago and I just changed the disk in question back to a raid disk and all was well. However I cant seem to find that option in my bios or raid config anymore :( Any help would be appreciated

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• Bios password protection

  - by user34268

  i have my system on drive ( c ) and also i had all my important folders on drive (d ) and i want to lock this drive with password ..... any advice

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• kvm process has too large a memory footprint on host

  - by gucki

  I'm using latest ubuntu quantal and start a kvm guest which should have 2048 MB of memory. Now after a few hours I can see that the kvm process of this guest is around 2700 MB, so 700 MB more than the guest should be able to consume. I mean a small overhead like 1% would be ok, but not 30%?! root 8631 74.0 22.2 4767484 2752336 ? Sl Nov07 512:58 kvm -cpu kvm64 -smp sockets=1,cores=2 -cpu kvm64 -m 2048 -device virtio-blk-pci,drive=drive-virtio0,id=virtio0,bus=pci.0,addr=0xa,bootindex=100 -drive file=rbd:data/vm-disk-1,if=none,id=drive-virtio0,cache=writeback,aio=native -device virtio-net-pci,netdev=net0,bus=pci.0,addr=0x12,id=net0,mac=02:7a:86:e6:1a:6c,bootindex=200 -netdev type=tap,id=net0,vhost=on -usbdevice tablet -nodefaults -enable-kvm -daemonize -boot menu=on -vga cirrus root 8694 0.0 0.0 0 0 ? S Nov07 0:00 [kvm-pit/8631] How is this possible and how to prevent it?

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• How to make a windows 7 usb flash install media, from linux?

  - by Ian Kelling

  I have: windows 7 iso 4+ gb usb flash drive no dvd linux installed

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• Windows Server 2008 R2 bare metal restore to different hardware

  - by S Falken

  Scenario: I have a Windows Server 2008 R2 x64 installation whose main disk drive is now 7 years old and showing signs of age. For the last couple of months it's been displaying increased errors and requirements to run checkdisk. I have successfully created a bare metal restore (BMR) image on a separate data drive on the server, which can be seen from the Windows Recovery console; I tested it by booting to and using the Windows Server installation DVD's recovery utilities. The BMR image includes the system drive with boot partition, system state, and the D:\ drive of the server, which is where I have followed the practice of installing any program that does not require a C:\ installation path. Therefore, the BMR includes both the C:\ and D:\ drives, system state and boot partition. The C:\ drive is a 7-year old Seagate 160GB. The D:\ drive is a rather newer 120GB Western Digital. I have purchased a 128GB solid state Samsung 830 that I want to restore these partitions to, using the BMR. Questions: In the above-referenced article, Microsoft seems to be indicating that I am only able to restore to like-kind hardware, which doesn't help at all and is difficult to believe. Is this really true? I've cleaned these drives up and minimized the size of partition they require. C:\ will need about a 70GB partition, and the data on D:\ will need about 50GB. Will Windows Server backup allow me to restore the BMR to newly-created partitions on the SSD, discarding extra space? I don't need a "how-to": I just need an "is it possible". Justification: Before posting this question, I checked ServerFault articles with the following titles, but none of them were about this exact scenario: Restore SBS 2008 Backup to Same Hardware but Different Disk Configuration Restoring Windows Server 2008 to different hardware - OEM License Restoring II6 server after a hardware failure windows 2008 r2 fail to restore Domain controller failed to restore using windows backup tools How does restore to dissimilar hardware work? Migrating Windows 2008 R2 from a PC to a different PC TFS 2005 Server restore from one hardware to another I also researched Microsoft but only received an oblique answer which was not precisely aimed at my question, at the following URL: http://support.microsoft.com/kb/249694#method3

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• Can you boot/install/restore a MacBook Pro with a MacBook Air USB stick?

  - by zekel

  The new MacBook Airs don't have optical drives, so you can't install or restore the OS via DVD. They include a little USB stick for this purpose. I have a MacBook Pro and a MacBook Air. Does anyone know if it will work with my MacBook Pro? I'm thinking about removing my optical drive to put in another HD. The only sticky situation I might get into is if I need to do an install or restore on the road without an external DVD drive. (Good article on replacing optical drive with hard drive enclosure: remiel.info/post/1601242301/making-the-leap-to-ssd-on-a-macbook)

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• Cannot get at data in my NAS

  - by Ben

  I've got a bit of an issue that I'm hoping you can help me with. I have an Iomega ix4 as my NAS. This runs Linux and each drive in the box has 2 partitions: one for the OS and RAID info, and the second for the actual data. I had it configured as RAID5. Recently one of the drives failed. At this point all of the data was available, it was just reporting a failed drive. I had a drive of the same capacity (although not the exact same spec) which I swapped in place of the failed drive. It recognised it, and started to rebuild the data protection. So far so good ... or so I thought. The next day, after data protection had finished reconstructing, the NAS was telling me that 4 new drives had been added, and wanted confirmation to overwrite the data. Obviously I declined to do this. I swapped the failed drive back in again, in the hope that it would return to its previous state of the data being accessible, but one failed disk. However it didn't - it still tells me that the NAS has 4 new drives in it. I am hopeful that the actual data is untouched, so what I need to do is get it to rebuild the RAID without touching the data on the disks. I have ssh access, and have run stuff like mdadm --examine to see what I can find. The mdadm.conf file has no entry in the "definitions of existing MD arrays" section. I have not run any actual rebuilding commands as yet, because this is entering an area which I am out of my depth in. Please can someone advise the best way of getting my data? Thanks.

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• SSD on Vmware ESXI 4 (TRIM? Good Idea?)

  - by nextgenneo

  Hi, I just posted about finding bottle necks and have narrowed it down to having way too many VMs on my machine on one 15K SAS drive. I have plenty of cores and plenty of ram. So I am planning on putting 6 VMs on one drive (so 5 drives for 30 VMs). I am thinking of using a 60GB Vertex 2 SSD. Each of my VMs will only need about 6GB of HDD space so this isn't a big deal. My questions are: does ESXI support Trim and do I really need it if I leave 25% of the drive as free space? If I need it should I get a diff drive that handles garbage collection differently? I have a RAID controller w/ write caching. I will still benefit from this? Will this effect my setup differently? Is there anything I need to consider regarding SSD's in virtualized environments. Thanks for any and all help!

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• Tool to test a user account and password (test login)

  - by TheCleaner

  Yeah, I can fire up a VM or remote into something and try the password...I know...but is there a tool or script that will simulate a login just enough to confirm or deny that the password is correct? Scenario: A server service account's password is "forgotten"...but we think we know what it is. I'd like to pass the credentials to something and have it kick back with "correct password" or "incorrect password". I even thought about a drive mapping script with that user account and password being passed to see if it mapped the drive successfully or not but got lost in the logic of making it work correctly...something like: -Script asks for username via msgbox -script asks for password via msgbox -script tries to map a drive to a common share that everyone has access to -script unmaps drive if successful -script returns popup msgbox stating "Correct Password" or else "Incorrect Password" Any help is appreciated...you'd think this would be a rare occurrence not requiring a tool to support it but...well....

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• Resized NTFS partition, now it wont mount.

  - by H4Z3Y

  I have had a 1.5TB drive used as an external for 6 months or so, then I decided to put it in my linux server for network storage. ntfs was being crazy inefficient so I wanted to change the filesystem to ext4. I used the ntfsresize command to reduce the partition to 650GB and that took abour 2 hours, then I deleted all of the entries in fstab like a guide told me too and created a new one the size of the ntfs partition, or, 650GB. after I modified fstab the ntfs partition would no longer mount and when plugging it in to windows it says "This Hard Drive needs to be formatted". any ideas on how I can recover the data off of the drive? I have 600GB of free space on a different drive so I just need some way of copying them off.

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