Date: Mon, 21 Feb 2011 19:48:14 +0300 From: Boris Samorodov <bsam@ipt.ru> To: Kurt Jaeger <lists@c0mplx.org> Cc: freebsd-stable@freebsd.org Subject: Re: 3TB disc and block alignment Message-ID: <71493761@h30.sp.ipt.ru> In-Reply-To: <20110221161637.GR34314@home.opsec.eu> (Kurt Jaeger's message of "Mon, 21 Feb 2011 17:16:37 %2B0100") References: <20110217115653.GH34314@home.opsec.eu> <AANLkTi=QMXvFtTyY9BUGg56VtTuac3G_0LnXaVboJQQz@mail.gmail.com> <20110217124515.GI34314@home.opsec.eu> <4D5D1D10.7010000@digsys.bg> <20110217180140.GL66849@dan.emsphone.com> <20110217204643.GJ34314@home.opsec.eu> <37576665@h30.sp.ipt.ru> <20110221161637.GR34314@home.opsec.eu>
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Hi!
On Mon, 21 Feb 2011 17:16:37 +0100 Kurt Jaeger wrote:
> > > Hmm, wasn't the issues with 3T drives, that they internally use
> > > 4K blocks and emulate 512 and that therefore 8 block alignments
> > > are an performance issue ?
> >
> > > The reason I'm asking: I encounter the problem of the lost
> > > secondary GPT table:
> >
> > > Feb 17 22:15:44 vserv1 kernel: GEOM: ad7: the secondary GPT table is corrupt or invalid.
^^^^^^^^^ [1]
> > > Feb 17 22:15:44 vserv1 kernel: GEOM: ad7: using the primary only -- recovery suggested.
> > > Feb 17 22:15:44 vserv1 kernel: GEOM: ufsid/4d5d8faa10b63ac1: the secondary GPT table is corrupt or invalid.
> > > Feb 17 22:15:44 vserv1 kernel: GEOM: ufsid/4d5d8faa10b63ac1: using the primary only -- recovery suggested.
> Boris Samorodov wrote:
> > It may be the case here if you to used glabel(8) to create a label
> > for the whole disk.
> I did not use glabel on that disk.
Hm, I may be wrong here but from the log [1] you do have a geom name
ad7. Can you show an output of the command:
-----
% glabel status
-----
> > Geom puts it's metainfo at the last sector of
> > the disk -- the same place which a secondary GPT table uses.
> Hmm. I'm still not sure how to test whether the drive/controller
> behaves.
--
WBR, bsam
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