[NBLUG/talk] Odd Raid Setup
gandalf at sonic.net
gandalf at sonic.net
Tue Mar 1 16:14:38 PST 2016
I thought this had died out, but yes I'm thinking it's some kind of
wierdness although I see it listed in /etc/mtab:
/dev/md0 / ext4 rw,relatime,user_xattr,errors=remount-ro 0 0
tmpfs /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
sysfs /sys sysfs rw,noexec,nosuid,nodev 0 0
udev /dev tmpfs rw,mode=0755 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
devpts /dev/pts devpts rw,noexec,nosuid,gid=5,mode=620 0 0
rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs rw 0 0
fusectl /sys/fs/fuse/connections fusectl rw 0 0
nfsd /proc/fs/nfsd nfsd rw 0 0
vmath /vmath zfs rw,xattr 0 0
vmath/video /vmath/video zfs rw,xattr 0 0
A professor here did say that he didn't know why the root raid was
mounted and to just use vmath/video which is what we're doing.
I do have one new drive installed ans silvered and another silivering
right now. It is odd. Logically there are two combined raids under pool
vmath so it's not necessary to combine the two.
On 2016-03-01 09:48, Steve S. wrote:
> 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 [1]
>>> 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
>>>
>>> _______________________________________________
>>> talk mailing list
>>> talk at nblug.org
>>> http://nblug.org/cgi-bin/mailman/listinfo/talk [2]
>>
>> --
>>
>> "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
>
> Links:
> ------
> [1] http://www.sun.com/msg/ZFS-8000-4J
> [2] http://nblug.org/cgi-bin/mailman/listinfo/talk
>
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