[NBLUG/talk] Odd Raid Setup

[Steve S.]

At a guess, you've hit some sort of bug in the filesystem or the RAID
software; or even a design-flaw (not a coding bug) in the way they interact

On Tue, Mar 1, 2016 at 9:45 AM, Steve S. <northbaygeek at gmail.com> wrote:

> It looks to me like Omar is onto something.
>
> That initial "df" where /vmath/video says it's a 22T partition running 51%
> full... that looks awfully suspicious to me, if it was built as an 11T
> partition.
>
> On Thu, Feb 25, 2016 at 4:27 PM, <gandalf at sonic.net> wrote:
>
>> I'm putting this out on socosa and nblug. Hope this doesn't anger anyone.
>>
>>
>> debian 6.0.3
>>
>> question filesystem: zfs Raid 6 - solaris filesystem
>>
>>
>> I've got a weird setup with two raid6 arrays each of about 11T. The odd
>> thing is how they are arranged. The one raid is mounted on /vmath and the
>> other raid is mounted on /vmath/video. The actual video files are stored
>> within /vmath/video. This seems really odd. Does anybody here know what's
>> going on? Is this just an odd way to get a 22T raid array?
>>
>> root at vmath:~# df -h
>> Filesystem            Size  Used Avail Use% Mounted on
>> /dev/md0              226G  3.5G  211G   2% /
>> tmpfs                 4.0G     0  4.0G   0% /lib/init/rw
>> udev                  4.0G  372K  3.9G   1% /dev
>> tmpfs                 4.0G     0  4.0G   0% /dev/shm
>> vmath                  11T  128K   11T   1% /vmath
>> vmath/video            22T   11T   11T  51% /vmath/video
>>
>> root at vmath:/etc# zfs list
>> NAME          USED  AVAIL  REFER  MOUNTPOINT
>> vmath        10.8T  10.6T  62.8K  /vmath
>> vmath/video  10.7T  10.6T  10.7T  /vmath/video
>>
>> root at vmath:/etc# zpool status
>>   pool: vmath
>>  state: DEGRADED
>> status: One or more devices could not be used because the label is
>> missing or
>>         invalid.  Sufficient replicas exist for the pool to continue
>>         functioning in a degraded state.
>> action: Replace the device using 'zpool replace'.
>>    see: http://www.sun.com/msg/ZFS-8000-4J
>>  scan: resilvered 24.8M in 0h1m with 0 errors on Mon Dec 29 10:23:10 2014
>> config:
>>
>>         NAME        STATE     READ WRITE CKSUM
>>         vmath       DEGRADED     0     0     0
>>           raidz2-0  ONLINE       0     0     0
>>             sdn     ONLINE       0     0     0
>>             sdm     ONLINE       0     0     0
>>             sdl     ONLINE       0     0     0
>>             sdk     ONLINE       0     0     0
>>             sdr     ONLINE       0     0     0
>>             sdq     ONLINE       0     0     0
>>             sdp     ONLINE       0     0     0
>>             sdo     ONLINE       0     0     0
>>           raidz2-1  DEGRADED     0     0     0
>>             sdf     ONLINE       0     0     0
>>             sde     ONLINE       0     0     0
>>             sdd     ONLINE       0     0     0
>>             sdc     ONLINE       0     0     0
>>             sdj     ONLINE       0     0     0
>>             sdi     UNAVAIL      0     4     0
>>             sdg     ONLINE       0     0     0
>>             sdh     UNAVAIL      9   129     3
>>
>> errors: No known data errors
>>
>>
>> root at vmath:~# cat /etc/fstab
>> # /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    defaults        0       0
>> # / was on /dev/md0 during installation
>> UUID=4eaa682b-9eef-48b0-baa8-d045f9ea5ca0 /               ext4
>> relatime,user_xattr,errors=remount-ro 0       1
>> # swap was on /dev/sda1 during installation
>> UUID=15d027a5-3ee5-40f2-9f83-b5f50f83ba67 none            swap    sw
>>         0       0
>> # swap was on /dev/sdb1 during installation
>> UUID=3efecbd4-631e-4b3f-a6d4-99d7eb750b14 none            swap    sw
>>         0       0
>> /dev/scd0       /media/cdrom0   udf,iso9660 user,noauto     0       0
>>
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>
>
>
> --
> "When I became a man I put away childish things, including the fear of
> childishness and the desire to be very grown up."      -CS Lewis
>



-- 
"When I became a man I put away childish things, including the fear of
childishness and the desire to be very grown up."      -CS Lewis
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