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5 junio, 2013

QNAP TS-212 How to rebuild RAID manually from telnet

by WebMaster

Scenario = replace a disk in QNAP TS-212 with RAID 1 configuration active

RAID rebuild should start automatically, but some times it could happen you got stuck with 1 Single Disk + 1 Mirroring Disk Volume:

SingleDisk

According to the QNAP Support – How can I migrate from Single Disk to RAID 0/1 in TS-210/TS-212? , TS-210/TS-212 does not support Online RAID Level Migration. Therefore, please backup the data on the single disk to another location, install the second hard drive, and then recreate the new RAID 0/1 array (hard drive must be formatted).

The workaround is this:

  1. Telnet to NAS as Admin
  2. Check your current disk configuration for Disk #1 and Disk #2 =
    fdisk -l /dev/sda
    Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
    255 heads, 63 sectors/track, 121601 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot Start End Blocks Id System
    /dev/sdb1 1 66 530125 83 Linux
    /dev/sdb2 67 132 530142 83 Linux
    /dev/sdb3 133 121538 975193693 83 Linux
    /dev/sdb4 121539 121600 498012 83 Linux

    fdisk -l /dev/sdb

    Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
    255 heads, 63 sectors/track, 121601 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot Start End Blocks Id System
    /dev/sda1 1 66 530125 83 Linux
    /dev/sda2 67 132 530142 83 Linux
    /dev/sda3 133 121538 975193693 83 Linux
    /dev/sda4 121539 121600 498012 83 Linux

  3. SDA is the first disk, SDB is the second disk
  4. Verify the current status of RAID with this command =
    mdadm –detail /dev/md0
    /dev/md0:
    Version : 00.90.03
    Creation Time : Thu Sep 22 21:50:34 2011
    Raid Level : raid1
    Array Size : 486817600 (464.27 GiB 498.50 GB)
    Used Dev Size : 486817600 (464.27 GiB 498.50 GB)
    Raid Devices : 2
    Total Devices : 1
    Preferred Minor : 0
    Persistence : Superblock is persistent

    Intent Bitmap : Internal

    Update Time : Thu Jul 19 01:13:58 2012
    State : active, degraded
    Active Devices : 1
    Working Devices : 1
    Failed Devices : 0
    Spare Devices : 0

    UUID : 72cc06ac:570e3bf8:427adef1:e13f1b03
    Events : 0.1879365

    Number Major Minor RaidDevice State
    0 0 0 0 removed
    1 8 3 1 active sync /dev/sda3

  5. As you can see the /dev/sda3 is working, so disk #1 is OK, but disk #2 is missing from RAID
  6. Check if Disk #2 /dev/sdb is mounted (it should be) =
    mount/proc on /proc type proc (rw)
    none on /dev/pts type devpts (rw,gid=5,mode=620)
    sysfs on /sys type sysfs (rw)
    tmpfs on /tmp type tmpfs (rw,size=32M)
    none on /proc/bus/usb type usbfs (rw)
    /dev/sda4 on /mnt/ext type ext3 (rw)
    /dev/md9 on /mnt/HDA_ROOT type ext3 (rw)
    /dev/md0 on /share/MD0_DATA type ext4 (rw,usrjquota=aquota.user,jqfmt=vfsv0,user_xattr,data=ordered,delalloc,noacl)
    tmpfs on /var/syslog_maildir type tmpfs (rw,size=8M)
    /dev/sdt1 on /share/external/sdt1 type ufsd (rw,iocharset=utf8,dmask=0000,fmask=0111,force)
    tmpfs on /.eaccelerator.tmp type tmpfs (rw,size=32M)
    /dev/sdb3 on /share/HDB_DATA type ext3 (rw,usrjquota=aquota.user,jqfmt=vfsv0,user_xattr,data=ordered,noacl)


     

  7. Dismount the /dev/sdb3 Disk #2 with this command =
    umount /dev/sdb3
  8. Add Disk #2 into the RAID /dev/md0 =
    mdadm /dev/md0 –add /dev/sdb3
    mdadm: added /dev/sdb3
  9. Check the RAID status and the rebuild should be started automatically =
    mdadm –detail /dev/md0
    /dev/md0:
    Version : 00.90.03
    Creation Time : Thu Sep 22 21:50:34 2011
    Raid Level : raid1
    Array Size : 486817600 (464.27 GiB 498.50 GB)
    Used Dev Size : 486817600 (464.27 GiB 498.50 GB)
    Raid Devices : 2
    Total Devices : 2
    Preferred Minor : 0
    Persistence : Superblock is persistent

    Intent Bitmap : Internal

    Update Time : Thu Jul 19 01:30:27 2012
    State : active, degraded, recovering
    Active Devices : 1
    Working Devices : 2
    Failed Devices : 0
    Spare Devices : 1

    Rebuild Status : 0% complete

    UUID : 72cc06ac:570e3bf8:427adef1:e13f1b03
    Events : 0.1879848

    Number Major Minor RaidDevice State
    2 8 19 0 spare rebuilding /dev/sdb3
    1 8 3 1 active sync /dev/sda3

  10. Check the NAS site for the rebuild % progressimage
  11. After the RAID rebuild complete, restart NAS to clean all previous mount point folder for sdb3

Obtained from this link

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Última actualización 18/10/2017 20:49; Última actualización de contenido 28/01/2014 13:04