[OpenIndiana-discuss] Seagate ST3000DM001

[Reginald Beardsley]

Thanks.  I'd seen a bunch of discussion that I did not read closely just prior to the Hitachi reporting block reallocations that suggested there can be issues.  I'd assumed that it was related to having a pool w/ mixed devices.

Mostly I'm badly overloaded w/ other issues and do not need more things eating my time.  If I'm going to replace the drive, I need it to be a 10-15 minute task.

Newegg sent me a 10% coupon that will result in a 3 TB drive at my door for $135.  They track what you look at and if you don't buy right away will offer enticements a few days later.  I

Have Fun!
Reg

--- On Wed, 7/11/12, Timothy Coalson <tsc5yc at mst.edu> wrote:

> From: Timothy Coalson <tsc5yc at mst.edu>
> Subject: Re: [OpenIndiana-discuss] Seagate ST3000DM001
> To: "Discussion list for OpenIndiana" <openindiana-discuss at openindiana.org>
> Date: Wednesday, July 11, 2012, 4:42 PM
> While I haven't used that particular
> model, if it mentions advanced
> format/smartalign, then it probably at least has a version
> that uses
> 4k sectors, and smartalign as I understand it basically
> means that the
> drive exposes this in a way that the OS can detect (part of
> the
> identify command I think?).  The detailed spec sheets
> may mention
> physical sector size, and I seem to recall some seagates
> having 512
> and 4k sector versions for the same size and model
> drive.  However,
> this really only matters if you are replacing a disk in a
> multi-device
> zpool.
> 
> If you don't know what sector size zfs used on your hitachi
> drive, you
> can run zdb -C on the pool, ashift=9 means 512, ashift=12
> means 4k.
> Since it is a single disk pool, if you have a spare sata
> port (or can
> spare one from an optical drive or something temporarily),
> you could
> just make a new pool on the new disk and zfs send/receive
> the data
> over (as long as it isn't over ~85% full, zfs will at least
> report
> less usable space on a fresh ashift=12 pool by around
> 8%).  You can
> then export the pools, and reimport the new pool under the
> old pool's
> name if you want.
> 
> I know of no drawbacks to ashift=12 or 4k sector drives in
> general
> besides the capacity thing, and I expect zfs to get the
> sector
> size/alignment right (use whole disk mode).  What
> problems are you
> worried about?
> 
> Tim
> 
> On Wed, Jul 11, 2012 at 3:01 PM, Reginald Beardsley <pulaskite at yahoo.com>
> wrote:
> > Anyone have any experience w/ these w/ Solaris 10 &
> ZFS?  The system this is for is an HP Z400 on the last
> Sun release of Solaris 10. This is a single large
> non-booting pool used for temporary files.  Single
> drive, no RAID.
> >
> > The blurb touts "Seagate SmartAlign technology for
> no-hassle transition to Advanced Format 4K sector
> technology"
> >
> > Some of the posts here about 4k sectors make me a
> little nervous that it might prove more work than I'd
> like.  Current drive is a Hitachi which is failing and
> has been powered down.
> >
> > Thanks,
> > Reg
> >
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