[OmniOS-discuss] [zfs] an interesting survey -- the zpool with most disks you have ever built

[Fred Liu]

2016-03-05 0:01 GMT+08:00 Freddie Cash <fjwcash at gmail.com>:

> On Mar 4, 2016 2:05 AM, "Fred Liu" <fred.fliu at gmail.com> wrote:
> > 2016-03-04 13:47 GMT+08:00 Freddie Cash <fjwcash at gmail.com>:
> >>
> >> Currently, I just use a simple coordinate system. Columns are letters,
> rows are numbers.
> >> "smartos-discuss at lists.smartos.org" <smartos-discuss at lists.smartos.org
> >、
>
> developer <developer at open-zfs.org>、
>
> illumos-developer <developer at lists.illumos.org>、
>
> omnios-discuss <omnios-discuss at lists.omniti.com>、
>
> Discussion list for OpenIndiana <openindiana-discuss at openindiana.org>、
>
> illumos-zfs <zfs at lists.illumos.org>、
>
> "zfs-discuss at list.zfsonlinux.org" <zfs-discuss at list.zfsonlinux.org>、
>
> "freebsd-fs at FreeBSD.org" <freebsd-fs at freebsd.org>、
>
> "zfs-devel at freebsd.org" <zfs-devel at freebsd.org>
>
> >> Each disk is partitioned using GPT with the first (only) partition
> starting at 1 MB and covering the whole disk, and labelled with the
> column/row where it is located (disk-a1, disk-g6, disk-p3, etc).
> >
> > [Fred]: So you manually pull off all the drives one by one to locate
> them?
>
> ​When putting the system together for the first time, I insert each disk
> one at a time, wait for it to be detected, partition it, then label it
> based on physical location.​  Then do the next one.  It's just part of the
> normal server build process, whether it has 2 drives, 20 drives, or 200
> drives.
>
> ​We build all our own servers from off-the-shelf parts; we don't buy
> anything pre-built from any of the large OEMs.​
>

[Fred]: Gotcha!


> >> The pool is created using the GPT labels, so the label shows in "zpool
> list" output.
> >
> > [Fred]:  What will the output look like?
>
> ​From our smaller backups server, with just 24 drive bays:
>
> $ zpool status storage
>
>   pool: storage
>
>  state: ONLINE
>
> status: Some supported features are not enabled on the pool. The pool can
>
> still be used, but some features are unavailable.
>
> action: Enable all features using 'zpool upgrade'. Once this is done,
>
> the pool may no longer be accessible by software that does not support
>
> the features. See zpool-features(7) for details.
>
>   scan: scrub canceled on Wed Feb 17 12:02:20 2016
>
> config:
>
>
> NAME             STATE     READ WRITE CKSUM
>
> storage          ONLINE       0     0     0
>
>  raidz2-0       ONLINE       0     0     0
>
>    gpt/disk-a1  ONLINE       0     0     0
>
>    gpt/disk-a2  ONLINE       0     0     0
>
>    gpt/disk-a3  ONLINE       0     0     0
>
>    gpt/disk-a4  ONLINE       0     0     0
>
>    gpt/disk-a5  ONLINE       0     0     0
>
>    gpt/disk-a6  ONLINE       0     0     0
>
>  raidz2-1       ONLINE       0     0     0
>
>    gpt/disk-b1  ONLINE       0     0     0
>
>    gpt/disk-b2  ONLINE       0     0     0
>
>    gpt/disk-b3  ONLINE       0     0     0
>
>    gpt/disk-b4  ONLINE       0     0     0
>
>    gpt/disk-b5  ONLINE       0     0     0
>
>    gpt/disk-b6  ONLINE       0     0     0
>
>  raidz2-2       ONLINE       0     0     0
>
>    gpt/disk-c1  ONLINE       0     0     0
>
>    gpt/disk-c2  ONLINE       0     0     0
>
>    gpt/disk-c3  ONLINE       0     0     0
>
>    gpt/disk-c4  ONLINE       0     0     0
>
>    gpt/disk-c5  ONLINE       0     0     0
>
>    gpt/disk-c6  ONLINE       0     0     0
>
>  raidz2-3       ONLINE       0     0     0
>
>    gpt/disk-d1  ONLINE       0     0     0
>
>    gpt/disk-d2  ONLINE       0     0     0
>
>    gpt/disk-d3  ONLINE       0     0     0
>
>    gpt/disk-d4  ONLINE       0     0     0
>
>    gpt/disk-d5  ONLINE       0     0     0
>
>    gpt/disk-d6  ONLINE       0     0     0
>
> cache
>
>  gpt/cache0     ONLINE       0     0     0
>
>  gpt/cache1     ONLINE       0     0     0
>
>
> errors: No known data errors
>
> The 90-bay systems look the same, just that the letters go all the way to
> p (so disk-p1 through disk-p6).  And there's one vdev that uses 3 drives
> from each chassis (7x 6-disk vdev only uses 42 drives of the 45-bay
> chassis, so there's lots of spares if using a single chassis; using two
> chassis, there's enough drives to add an extra 6-disk vdev).
>

[Fred]: It looks like the gpt label shown in "zpool status" only works in
FreeBSD/FreeNAS. Are you using FreeBSD/FreeNAS? I can't find the similar
possibilities in Illumos/Linux.

Thanks,

Fred

>
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