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Malkavian
Asked: 2016-09-03 05:05:59 +0800 CST

how to mount raid

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I have the following funny experiment. I used a live usb to install ubuntu server 12.04 i386 and webmin on a usb plugged to an intel ss4200-e, i would like to make a headless samba server out of it. webmin shows the following situation on the partitions menu:

Disk name       Total size      Make and model      Partitions      Actions   
SCSI device A   7.39 GB     Kingston DataTraveler 3.0   3   Identify drive
SATA device B   953.83 GB   ATA Hitachi HDE72101    1   IDE parameters | Identify drive
SATA device C   953.83 GB   ATA Hitachi HDE72101    1   IDE parameters | Identify drive
SATA device D   953.83 GB   ATA Hitachi HDE72101    1   IDE parameters | Identify drive
SATA device E   953.83 GB   ATA Hitachi HDE72101    1   IDE parameters | Identify drive

the raid menu shows:

Device name     Status  RAID level  Usable size     Member disk devices
/dev/md0    clean   RAID5 (Distributed Parity)  2.60 TB     /dev/sdb1 | /dev/sdc1 | /dev/sdd1 | /dev/sde1

and then the \dev\md0 tab shows

Device file     /dev/md0
UUID    fcf48163:7efca14a:7bb08b15:81161d20
RAID level  RAID5 (Distributed Parity)
Filesystem status   Used in LVM VG volume
Usable size     2794526208 blocks (2.60 TB)
Persistent superblock?  Yes
Layout  left-symmetric
Chunk size  128 kB
RAID status     clean
Partitions in RAID  SATA device B partition 1
SATA device C partition 1
SATA device D partition 1
SATA device E partition 1

fstab looks like this:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    nodev,noexec,nosuid 0       0
# / was on /dev/sdb1 during installation
UUID=437ea85c-1a1a-449f-a87f-e358cce2ba7e /               ext2    errors=remount                                                           -ro 0       1
# swap was on /dev/sdb5 during installation
UUID=8800da26-a98b-4a6b-aa96-917fc529bfe1 none            swap    sw                                                                         0       0

pvs

  PV         VG     Fmt  Attr PSize PFree
  /dev/md0   volume lvm2 a-   2,60t    0

how do I mount that /dev/md0 into /mnt/raidarray at boot for example?

raid

1 Answers

  1. Best Answer

    Assuming your block device /dev/md0 is formatted, you issue the following command:

    sudo blkid /dev/md0

    This will give you a UUID and normally will tell you what filesystem it is formatted in.

    Then add the following line to your /etc/fstab

    UUID=the-uui-blkid-gave-you /mnt/raidarray file-system-you-used defaults 0 0

    Afterwards type sudo mount -a and your device should get mounted. Do note that the directory /mnt/raidarray should exist.

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