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  • How can I combine non-identical disks efficiently?

    - by Odys
    There are some not-identical disk of various capacities that I want to combine (somehow). Since there are no duplicate models, I can't use raid between none of them. Is there a way to use them efficiently while being safe? What I have in mind is a software that will use them as if it were Raid-5 or something. I really don't care about max speed. I want in the end to have as less logical drives as possible. Also, I don't mind spending some money on hardware, if needed.

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  • unable to mount disks in usb dvd drive

    - by Arcath
    I have 2 USB DVD drives. One that I borrowed from work which I have been testing with which works fine for me, which is why I brought one of myself. When I try and mount my new dvd drive this happens: [18:06:45][arcath@londinium][~] sudo mount /dev/sr0 /mnt/dvd/ mount: special device /dev/sr0 does not exist /dev/sr0 is only in the list when the drive is attached and it works on other machines using the same cables so it must be something with my server. The server is running Ubuntu 10.10 server

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  • Minimize writes to SSD disks with Windows 7

    - by mfn
    Most people use their SSD as their primary system installation disk with Windows 7. W7 already has a lot of optimizations for SSDs, both in terms of performance and lifetime. Minimizing writes increases the lifetime of SSDs, so post each suggestion as an answer and let others vote on them.

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  • Ubunt doesn't mount one of my NTFS disks

    - by Jader Dias
    There is a mountable /dev/sda NTFS formatted (Windows disk) There is no /dev/sdb when I ls /dev (NTFS Data disk) There is a /dev/sdc which is another disk of the same model, (Ubuntu disk) I can see that Ubuntu detected this unmountable disk in the Disk Utility It states incorrectly it is unpartioned and a RAID volume. (it previously was RAID0 setup with /dev/sdc but now it is a simple volume, no RAID whatsoever) When I boot Windows 7, it uses this unmountable disk without a glitch The problem happens in both IDE and AHCI modes Ubuntu 10.04 Lucid Lynx

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  • Restoring Dell recovery disks while preserving Linux partition

    - by Flup
    I have a Dell laptop dual-booting to Windows 7 and Linux. I have through my own stupidity royally stuffed the Windows partition. I have the set of recovery DVDs that I created when I first got the laptop, and I've successfully booted from them in a VirtualBox VM and ended up with a fresh (albeit virtualised) installation of Windows 7. When I started the recovery process, there was mention of other partitions being preserved, but it was unclear as to whether non-NTFS partitions would survive the process. The question is: can I run the recovery procedure without risking my Linux partition?

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  • Dell eSATAp not working with some SATA disks

    - by pistache
    I have a Dell Inspiron XPS 15 (L502X) laptop, with an eSATAp port. I also have a Western Digital 1TB 3"5 SATA drive, that I'd like to use with the laptop. I bought a eSATAp <- SATA 22-pin cable (from Delock). When I use this cable my 3"5 HDD does NOT power up, no spin up. I thought that it's just this HDD taking too much power from the motherboard. However, I tested too with my 2"5 SATA HDD and it works successfully. Now the weird thing is that this 2"5 HDD takes 1.1A at 5V, and that the 3"5 HDD takes 0.7A at 5V. I don't understand why it can't work. Is there anything I could do for it to work ? What is really the problem ? Thanks for your help, Hugo

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  • Minimize writes to SSD disks with Windows 7

    - by mark
    Most people use their SSD as their primary system installation disk with Windows 7. W7 already has a lot of optimizations for SSDs, both in terms of performance and lifetime. Minimizing writes increases the lifetime of SSDs, so post each suggestion as an answer and let others vote on them. Update: I'm not sure anymore that minimizing writes is a good thing [tm], hard facts that SSDs will degrade within a noticeable time are missing and it seems this it can create a bit FUD about the functionality of the SSD. In other words: I question the usefulness of my wiki question.

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  • Windows boot manager and two hard disks

    - by Pincopallino
    here's my situation: I had an HDD with Windows 8 installed (UEFI mode). I bought a SSD and wanted to do a clean install of Windows, so I thought that disabling the HDD and leaving the SSD as the only drive when installing was the right procedure to install the boot manager on the SSD. Unfortunately, after I plugged the HDD back in, the computer won't boot unless I select from the BIOS directly the SSD as the boot device. I guess the problem is that I have two Windows Boot Managers on two separate drives and they conflict. How would I solve this problem (excluding a format of the HDD, because I need to access data on the old Windows partition and, ideally, I would like to be able to boot that partition)?

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  • permanently mount multiple directories from different disks under root [on hold]

    - by piotrek
    I have SSD and HDD. Some directories like /var /srv /tmp should be on hdd while /boot /usr /lib on ssd. But do I have to create separate partition for every single directory? i want to have 2 or so partitions. one for each disk and distribute directories as needed. is it possible? and how? i've heard about symlinks, mount --bind, mhddfs but: symlinks are treated differently by tools like cp so i'm not sure if it's safe to have main system directories symlinked i have no idea how can I use mount --bind or mhddfs in fstab

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  • Rebuild mdadm RAID5 array with fewer disks

    - by drjeep
    I have a 4 disk RAID5 array, one of which is starting to fail according to smartd. However, since I'm using less than half the space on /dev/md0, I'd like to rebuild the array without the failing disk. The closest scenario I've been able to find online has been this post, however it contains bits that don't apply to me (LVM volumes) and also doesn't explain how I go about resizing the partition after I'm done. Please note I have backups of important data, but I'd like to avoid rebuilding the array from scratch if possible.

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  • VMWare Server 2.0 Physical disks

    - by heavyd
    I have a machine setup with VMWare Server 2.0. There are several VMs running on the VMWare server and I have several physical drives. I would like to give one of the VMs exclusive access to one entire physical drive. Is it possible to essential give a physical drive to one of the VMs and let it access it as if it were actual hardware?

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  • Where are my Hard Drives/Local Disks on the COMPUTER/System Folder in Ubuntu 12.04?

    - by Russel
    Being first to try Ubuntu. But Where are my Hard Drives/Local Disks on the COMPUTER/System Folder in Ubuntu 12.04?! Before installing 12.04 i had tried the Ubuntu 10.10 Version Live and it was perfect in showing my Local Disks. But it couldn't recognize my GTX 470 Graphics driver so i thought of trying the recent version i.e 12.04. Fortunately it solved the Graphics driver thing but now i am stuck with finding My Local Disks on 12.04. I am sorry if this is a silly question, but i know nothing of Ubuntu at the moment. Regards,

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  • How do I copy/clone a dynamic disk in Windows 7?

    - by PP
    I have some dynamic disks (or "partitions" but they are not really partitions) that I want to copy onto spare hard drives. I tried using gpartd (and fdisk for that matter) from a linux live disc. All it saw was hard drives with only one partition encasing the whole hard drive. So gpartd/fdisk is incapable of identifying the dynamic "partitions" and allowing me to copy them. Any tools that can be used to clone/copy a dynamic "partition"? (I'm open to commercial software suggestions if they can do the job).

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  • Poor disk performance with high disk capacity usage

    - by GoldenNewby
    I've heard numerous times in the web hosting industry that using "too much" disk space on a drive is bad for performance. Is this just a myth? Can someone explain why this is an issue, even in a situation where the amount of IO done to the drive would be the same at 10% as it would be at 90%? I'm especially curious in the case of virtual servers. If I set up 10 Logical volumes as the virtual disks for some VMs, is it going to run better if I "waste" 20% of the disk space?

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  • Associate mount points with local disks in VBscript / WMI

    - by Mark Unwin
    I have a VBscript that outputs various config items about a system. Both hardware and software. I can output disks and their associated partitions. I can output mount points. I do not seem to be able to associate a mount point with a local disk (where it actually is a local disk). I need to be able to do this using VBscript, so as to fit in with the rest of the ~2000 lines of code. I do NOT want to run some other program graphically. I know the disk manager service can show me (My Computer - Manage - Disk Management), but this is not what I need. I need to be able to do this remotely via VBscript. I am open to running an .exe from the VBscript and piping the output back into VBscript and massaging it from there. Any idea's ? Thanks in advance.

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  • Can grub handle same release (3.6) but new rc (rc5)?

    - by hhoyt
    can grub handle newer kerner rc ? I am running 3.6.0-rc4 ok, grub update definitely recognizes all required files for rc5, but edit of grub.cfg only shows rc4 after grub-update. D/N matter whether I generate kernel 3.6.0-rc5 or whether I install the .deb files. Generating grub.cfg ... using custom appearance settings Found background image: /usr/share/peppermint/wallpapers/Peppermint.jpg Found linux image: /boot/vmlinuz-3.6.0-030600rc5-generic Found linux image: /boot/vmlinuz-3.6.0-030600rc4-generic Found initrd image: /boot/initrd.img-3.6.0-030600rc4-generic Found linux image: /boot/vmlinuz-3.6.0-rc5 Found initrd image: /boot/initrd.img-3.6.0-rc5 Found linux image: /boot/vmlinuz-3.6.0-rc5.old Found initrd image: /boot/initrd.img-3.6.0-rc5 Found linux image: /boot/vmlinuz-3.5.3 Found initrd image: /boot/initrd.img-3.5.3 Found linux image: /boot/vmlinuz-3.5.3.old Found initrd image: /boot/initrd.img-3.5.3 Found linux image: /boot/vmlinuz-3.5.0-13-generic Found initrd image: /boot/initrd.img-3.5.0-13-generic Found Ubuntu 10.04.1 LTS (10.04) on /dev/sda1 Found Ubuntu 10.04.4 LTS (10.04) on /dev/sda10 Found Peppermint Two (2) on /dev/sda15 Found Ubuntu 10.10 (10.10) on /dev/sda16 Found Windows 7 (loader) on /dev/sda3 Found Ubuntu 11.04 (11.04) on /dev/sda5 Found Ubuntu 12.04.1 LTS (12.04) on /dev/sda6 Found Linux Mint 12 LXDE (12) on /dev/sda8 Found MS-DOS 5.x/6.x/Win3.1 on /dev/sdc1 If I press 'e' on boot startup of rc4 and manually change it to rc5 and ctrl-x, it comes up fine. I just cannot get grub.cfg to update such that rc4 is included. Thanks, Howard # DO NOT EDIT THIS FILE # It is automatically generated by grub-mkconfig using templates from /etc/grub.d and settings from /etc/default/grub # BEGIN /etc/grub.d/00_header if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="Windows 7 (loader) (on /dev/sda3)" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } insmod part_msdos insmod ext2 set root='(hd1,msdos1)' search --no-floppy --fs-uuid --set=root 218e9f6f-c21e-4c50-90a5-5a40be639b66 if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=640x480 load_video insmod gfxterm insmod part_msdos insmod ext2 set root='(hd1,msdos1)' search --no-floppy --fs-uuid --set=root 218e9f6f-c21e-4c50-90a5-5a40be639b66 set locale_dir=($root)/boot/grub/locale set lang=en_US insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi END /etc/grub.d/00_header BEGIN /etc/grub.d/05_debian_theme insmod part_msdos insmod ext2 set root='(hd1,msdos1)' search --no-floppy --fs-uuid --set=root 218e9f6f-c21e-4c50-90a5-5a40be639b66 insmod jpeg if background_image /usr/share/peppermint/wallpapers/Peppermint.jpg; then set color_normal=light-gray/black set color_highlight=magenta/black else set menu_color_normal=white/black set menu_color_highlight=black/light-gray fi END /etc/grub.d/05_debian_theme BEGIN /etc/grub.d/10_linux_proxy menuentry "Peppermint, with Linux 3.6.0-030600rc4-generic" --class peppermint --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(hd1,msdos1)' search --no-floppy --fs-uuid --set=root 218e9f6f-c21e-4c50-90a5-5a40be639b66 linux /boot/vmlinuz-3.6.0-030600rc4-generic root=UUID=218e9f6f-c21e-4c50-90a5-5a40be639b66 ro initrd /boot/initrd.img-3.6.0-030600rc4-generic } END /etc/grub.d/10_linux_proxy BEGIN /etc/grub.d/30_os-prober_proxy menuentry "Peppermint, with Linux 3.6.0-030600rc4-generic (on /dev/sda15)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos15)' search --no-floppy --fs-uuid --set=root 21a3d91a-ae43-4f51-b8d6-7f3dc80967d7 linux /boot/vmlinuz-3.6.0-030600rc4-generic root=UUID=21a3d91a-ae43-4f51-b8d6-7f3dc80967d7 ro splash quiet splash vt.handoff=7 initrd /boot/initrd.img-3.6.0-030600rc4-generic } menuentry "Ubuntu, with Linux 3.0.0-24-generic (on /dev/sda10)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos10)' search --no-floppy --fs-uuid --set=root 6c9a0149-3045-4335-83fa-a2513ca3a250 linux /boot/vmlinuz-3.0.0-24-generic root=UUID=6c9a0149-3045-4335-83fa-a2513ca3a250 ro crashkernel=384M-2G:64M,2G-:128M splash initrd /boot/initrd.img-3.0.0-24-generic } menuentry "Ubuntu, with Linux 3.5.0-030500rc7-generic (on /dev/sda10)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos10)' search --no-floppy --fs-uuid --set=root 6c9a0149-3045-4335-83fa-a2513ca3a250 linux /boot/vmlinuz-3.5.0-030500rc7-generic root=UUID=6c9a0149-3045-4335-83fa-a2513ca3a250 ro crashkernel=384M-2G:64M,2G-:128M splash initrd /boot/initrd.img-3.5.0-030500rc7-generic } menuentry "Peppermint, with Linux 3.3.0-030300rc2-generic (on /dev/sda15)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos15)' search --no-floppy --fs-uuid --set=root 21a3d91a-ae43-4f51-b8d6-7f3dc80967d7 linux /boot/vmlinuz-3.3.0-030300rc2-generic root=UUID=21a3d91a-ae43-4f51-b8d6-7f3dc80967d7 ro splash quiet splash vt.handoff=7 initrd /boot/initrd.img-3.3.0-030300rc2-generic } menuentry "Ubuntu, with Linux 2.6.39-rc5-candela (on /dev/sda16)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos16)' search --no-floppy --fs-uuid --set=root 48fcb5ec-b51b-4afd-b0e5-a2aace66f6e1 linux /boot/vmlinuz-2.6.39-rc5-candela root=/dev/sda7 ro splash initrd /boot/initrd.img-2.6.39-rc5-candela } menuentry "Windows 7 (loader) (on /dev/sda3)" --class windows --class os { insmod part_msdos insmod ntfs set root='(hd0,msdos3)' search --no-floppy --fs-uuid --set=root EA3EFABB3EFA7FBD chainloader +1 } menuentry "Ubuntu, with Linux 2.6.38-13-generic (on /dev/sda5)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos5)' search --no-floppy --fs-uuid --set=root bcfe855e-a449-429d-b204-c667e129a4bd linux /boot/vmlinuz-2.6.38-13-generic root=UUID=bcfe855e-a449-429d-b204-c667e129a4bd ro quiet splash vt.handoff=7 initrd /boot/initrd.img-2.6.38-13-generic } menuentry "Ubuntu, with Linux 3.2.0-29-generic-pae (on /dev/sda6)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos6)' search --no-floppy --fs-uuid --set=root 369605ad-1a92-4b7d-abb5-ce75cbdfc9c1 linux /boot/vmlinuz-3.2.0-29-generic-pae root=UUID=369605ad-1a92-4b7d-abb5-ce75cbdfc9c1 ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-29-generic-pae } menuentry "Ubuntu, with Linux 3.2.0-23-generic-pae (on /dev/sda6)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos6)' search --no-floppy --fs-uuid --set=root 369605ad-1a92-4b7d-abb5-ce75cbdfc9c1 linux /boot/vmlinuz-3.2.0-23-generic-pae root=UUID=369605ad-1a92-4b7d-abb5-ce75cbdfc9c1 ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-23-generic-pae } menuentry "Linux Mint 12 LXDE, 3.0.0-12-generic (/dev/sda8) (on /dev/sda8)" --class gnu-linux --class gnu --class os { insmod part_msdos insmod ext2 set root='(hd0,msdos8)' search --no-floppy --fs-uuid --set=root ccdc67ed-e81c-4f85-9b75-fe0c24c65bb8 linux /boot/vmlinuz-3.0.0-12-generic root=UUID=ccdc67ed-e81c-4f85-9b75-fe0c24c65bb8 ro quiet splash vt.handoff=7 initrd /boot/initrd.img-3.0.0-12-generic } menuentry "MS-DOS 5.x/6.x/Win3.1 (on /dev/sdc1)" --class windows --class os { insmod part_msdos insmod ntfs set root='(hd2,msdos1)' search --no-floppy --fs-uuid --set=root A8F0DE02F0DDD6A2 drivemap -s (hd0) ${root} chainloader +1 } END /etc/grub.d/30_os-prober_proxy BEGIN /etc/grub.d/40_custom This file provides an easy way to add custom menu entries. Simply type the menu entries you want to add after this comment. Be careful not to change the 'exec tail' line above. END /etc/grub.d/40_custom BEGIN /etc/grub.d/41_custom if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi END /etc/grub.d/41_custom

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  • Disk performance below expectations

    - by paulH
    this is a follow-up to a previous question that I asked (Two servers with inconsistent disk speed). I have a PowerEdge R510 server with a PERC H700 integrated RAID controller (call this Server B) that was built using eight disks with 3Gb/s bandwidth that I was comparing with an almost identical server (call this Server A) that was built using four disks with 6Gb/s bandwidth. Server A had much better I/O rates than Server B. Once I discovered the difference with the disks, I had Server A rebuilt with faster 6Gbps disks. Unfortunately this resulted in no increase in the performance of the disks. Expecting that there must be some other configuration difference between the servers, we took the 6Gbps disks out of Server A and put them in Server B. This also resulted in no increase in the performance of the disks. We now have two identical servers built, with the exception that one is built with six 6Gbps disks and the other with eight 3Gbps disks, and the I/O rates of the disks is pretty much identical. This suggests that there is some bottleneck other than the disks, but I cannot understand how Server B originally had better I/O that has subsequently been 'lost'. Comparative I/O information below, as measured by SQLIO. The same parameters were used for each test. It's not the actual numbers that are significant but rather the variations between systems. In each case D: is a 2 disk RAID 1 volume, and E: is a 4 disk RAID 10 volume (apart from the original Server A, where E: was a 2 disk RAID 0 volume). Server A (original setup with 6Gpbs disks) D: Read (MB/s) 63 MB/s D: Write (MB/s) 170 MB/s E: Read (MB/s) 68 MB/s E: Write (MB/s) 320 MB/s Server B (original setup with 3Gpbs disks) D: Read (MB/s) 52 MB/s D: Write (MB/s) 88 MB/s E: Read (MB/s) 112 MB/s E: Write (MB/s) 130 MB/s Server A (new setup with 3Gpbs disks) D: Read (MB/s) 55 MB/s D: Write (MB/s) 85 MB/s E: Read (MB/s) 67 MB/s E: Write (MB/s) 180 MB/s Server B (new setup with 6Gpbs disks) D: Read (MB/s) 61 MB/s D: Write (MB/s) 95 MB/s E: Read (MB/s) 69 MB/s E: Write (MB/s) 180 MB/s Can anybody suggest any ideas what is going on here? The drives in use are as follows: Dell Seagate F617N ST3300657SS 300GB 15K RPM SAS Dell Hitachi HUS156030VLS600 300GB 3.5 inch 15000rpm 6GB SAS Hitachi Hus153030vls300 300GB Server SAS Dell ST3146855SS Seagate 3.5 inch 146GB 15K SAS

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  • From the Tips Box: Location-based To-Do Reminders, DIY Floppy Drive Music, and Easy Access to Product Manuals

    - by Jason Fitzpatrick
    Once a week we round up some great tips from the HTG tip box and share them with you; this week we’re looking at location based to-do reminders for Android phones, how to make your own floppy drive symphony, and an easy way to enjoy anywhere access to your manuals and product documentation. HTG Explains: What The Windows Event Viewer Is and How You Can Use It HTG Explains: How Windows Uses The Task Scheduler for System Tasks HTG Explains: Why Do Hard Drives Show the Wrong Capacity in Windows?

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  • Explain difference in SQLIO numbers for RAID 0 versus RAID 5 over 6 disks

    - by markn
    When using the SQLIO benchmark tool on a 4-core Dell server with 6 15k 450GB (fast) drives, RAID 0, we found the max throughput was 2MB per second. But when configured as RAID 5, we get 30 MB per second. It seems that the RAID controller, Dell Perc 5i integrated controller, is maxing out the throughput per disk. With RAID 5, I expect to get a bump due to stripping, but not a 15x difference. Like good programmers, we suspect the hardware , but we could be missing something. This is predominately write traffic.

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  • Tools to partition dynamic disk

    - by rangalo
    Hi, I have a 1 TB hard-disk with windows 7 pre-installed. I would like to delete, resize some partition and create ext3/swap partitions to install linux. Which tools are available for this ? I tried gparted, it doesn't work.

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  • Can't activate dynamic disk

    - by SuperFurryToad
    For some reason I can't activate a dynamic disk connected to my PC via a USB hard disk enclosure. It has activated previously without any problems. When I check the event logs, I get this message every time I try to activate the disk: dmio: Harddisk2 write error at block 2930277167: status 0xc0000015

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  • Virtual box - How to add disks and move var, opt and home to them?

    - by Jarrod Roberson
    I created a CentOS 5.6 Guest OS Virtual Machine. I made the first disk 10GB, I am rapidly outgrowing it. It was suggested that I make disks for my /var, /opt and /home directories and move them so I can better manage the disks for backing up and what not. This sounds like a good idea. I know how to create the disks in Virtual Box. I have dug around Google and the internet in general and all my attempts at doing this have failed. Snapshots are awesome! I can get the drives fdisked, and I have had limited success mounting them to /mnt/var, /mnt/home and /mnt/opt, but even in single user mode ( init 1 ) I can't get the entire contents of the directories to move over, and then the machine won't reboot correctly. cd /var cp * -ax /mnt/var The /var directory in particular is not wanting to move everything to the new location. How do I format, mount and move the /var, /opt and /home to my new disks?

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