Results 1 to 6 of 6

Thread: 12.04 RAID 1 array

Hybrid View

  1. #1
    Join Date
    Apr 2008
    Location
    New England
    Beans
    41
    Distro
    Ubuntu 12.04 Precise Pangolin

    12.04 RAID 1 array

    I've been a linux desktop user for a while. Was using 10.04 LTS and just upgraded to 12.04 LTS. In my previous system i successfully set up a RAID 1 array with two 500 GIG drives. The two drives are separate from the system drive.

    I've done a lot of google searches looking for a guide on how to set this up and tried going through the same instructions to set up the array for 10.04 under 12.04. Unfortunately, i'm having problems when booting my machine and getting degraded errors and the array coming up as md127 instead of md0.

    I was curious if a RAID 1 setup under 12.04 has been documented. Any help would go most appreciated!

    Thanks in advance!
    registered linux user #438335

  2. #2
    Join Date
    Feb 2005
    Location
    Melbourne, Australia
    Beans
    13,505
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: 12.04 RAID 1 array

    Quote Originally Posted by Wangberg View Post
    I've been a linux desktop user for a while. Was using 10.04 LTS and just upgraded to 12.04 LTS. In my previous system i successfully set up a RAID 1 array with two 500 GIG drives. The two drives are separate from the system drive.

    I've done a lot of google searches looking for a guide on how to set this up and tried going through the same instructions to set up the array for 10.04 under 12.04. Unfortunately, i'm having problems when booting my machine and getting degraded errors and the array coming up as md127 instead of md0.

    I was curious if a RAID 1 setup under 12.04 has been documented. Any help would go most appreciated!

    Thanks in advance!
    What happens when you use the "Create RAID" option in the Disk Utility?
    Regards, David.
    Please use the Forum search and Wiki search for immediate help
    Please mark your thread as Solved when appropriate
    New to technical forums?: How To Ask Questions The Smart Way

  3. #3
    Join Date
    Apr 2008
    Location
    New England
    Beans
    41
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: 12.04 RAID 1 array

    Quote Originally Posted by dcstar View Post
    What happens when you use the "Create RAID" option in the Disk Utility?
    Similar scene. it changes md0 to md127 Fortunately my system boots but see:

    Code:
    wangberg@box:~$ sudo fdisk -l
    [sudo] password for wangberg: 
    
    Disk /dev/sda: 500.1 GB, 500107862016 bytes
    255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00069f26
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *        2048   943316991   471657472   83  Linux
    /dev/sda2       943319038   976771071    16726017    5  Extended
    /dev/sda5       943319040   976771071    16726016   82  Linux swap / Solaris
    
    Disk /dev/sdb: 500.1 GB, 500107862016 bytes
    255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x0008e086
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sdb1              63   976768064   488384001   fd  Linux raid autodetect
    
    Disk /dev/sdc: 500.1 GB, 500107862016 bytes
    255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x0003c52d
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sdc1              63   976768064   488384001   fd  Linux raid autodetect
    
    Disk /dev/md127: 500.0 GB, 499970801664 bytes
    2 heads, 4 sectors/track, 122063184 cylinders, total 976505472 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00000000
    
    Disk /dev/md127 doesn't contain a valid partition table
    Additionally, when i did a system update, i found this error:

    Code:
    update-initramfs: Generating /boot/initrd.img-3.5.0-25-generic
    W: mdadm: the array /dev/md/RAID_0 with UUID 344ff0b4:0b5f45df:78c7c50f:4c5de621
    W: mdadm: is currently active, but it is not listed in mdadm.conf. if
    W: mdadm: it is needed for boot, then YOUR SYSTEM IS NOW UNBOOTABLE!
    W: mdadm: please inspect the output of /usr/share/mdadm/mkconf, compare
    w: mdadm: it to /etc/mdadm/mdadm.conf, and make the necessary changes.
    For Reference:

    /etc/mdadm/mdadm.conf

    Code:
    DEVICE partitions
    ARRAY /dev/md0 metadata=1.2 name=nala:0 UUID=ba9aea27:ca8ea022:71ca3902:19f07b8b
    MAILADDR root
    Last edited by Wangberg; February 23rd, 2013 at 01:35 AM. Reason: new data found
    registered linux user #438335

  4. #4
    Join Date
    Feb 2005
    Location
    Melbourne, Australia
    Beans
    13,505
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: 12.04 RAID 1 array

    Quote Originally Posted by Wangberg View Post
    .........
    Code:
    update-initramfs: Generating /boot/initrd.img-3.5.0-25-generic
    W: mdadm: the array /dev/md/RAID_0 with UUID 344ff0b4:0b5f45df:78c7c50f:4c5de621
    W: mdadm: is currently active, but it is not listed in mdadm.conf. if
    W: mdadm: it is needed for boot, then YOUR SYSTEM IS NOW UNBOOTABLE!
    W: mdadm: please inspect the output of /usr/share/mdadm/mkconf, compare
    w: mdadm: it to /etc/mdadm/mdadm.conf, and make the necessary changes.
    For Reference:

    /etc/mdadm/mdadm.conf

    Code:
    DEVICE partitions
    ARRAY /dev/md0 metadata=1.2 name=nala:0 UUID=ba9aea27:ca8ea022:71ca3902:19f07b8b
    MAILADDR root
    And what are the results of those explicit instructions?
    Regards, David.
    Please use the Forum search and Wiki search for immediate help
    Please mark your thread as Solved when appropriate
    New to technical forums?: How To Ask Questions The Smart Way

  5. #5
    Join Date
    Apr 2008
    Location
    New England
    Beans
    41
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: 12.04 RAID 1 array

    Quote Originally Posted by dcstar View Post
    And what are the results of those explicit instructions?
    there is something I am missing. the mdadm.conf and mkconf files are incomplete. I don't know what necessary changes to make...any suggestions?

    mkconf:

    Code:
    wangberg@box:~$ /usr/share/mdadm/mkconf
    # mdadm.conf
    #
    # Please refer to mdadm.conf(5) for information about this file.
    #
    
    # by default (built-in), scan all partitions (/proc/partitions) and all
    # containers for MD superblocks. alternatively, specify devices to scan, using
    # wildcards if desired.
    #DEVICE partitions
    
    # auto-create devices with Debian standard permissions
    CREATE owner=root group=disk mode=0660 auto=yes
    
    # automatically tag new arrays as belonging to the local system
    HOMEHOST <system>
    
    # instruct the monitoring daemon where to send mail alerts
    MAILADDR root
    
    # definitions of existing MD arrays
    mdadm.conf:

    Code:
    wangberg@box:~$ cat /etc/mdadm/mdadm.conf 
    DEVICE partitions
    ARRAY /dev/md0 metadata=1.2 name=nala:0 UUID=ba9aea27:ca8ea022:71ca3902:19f07b8b
    MAILADDR root
    registered linux user #438335

  6. #6
    Join Date
    Apr 2008
    Location
    New England
    Beans
    41
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: 12.04 RAID 1 array

    This is really getting frustrating.

    1) what should a healthy mdadm.conf look like?
    2) how can i restore my raid partition to reflect /md0 as opposed to /md127
    3) there are inconsistencies all over the place from md0 vs md127 to disk utility saying this is a healthy raid array. How can i determine if this array is arunning properly?

    in Ubuntu 10.04, this was a 15 minute project. in 12.04 this is turning into a project that i've been researching for the past week.

    please, any direction would go most appreciated so i can just get my data backed up.
    registered linux user #438335

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •