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From: Alfred Matthews <asm13243546@gmail.com>
To: NeilBrown <neilb@suse.com>, linux-raid@vger.kernel.org
Subject: Re: on assembly and recovery of a hardware RAID
Date: Mon, 20 Mar 2017 17:42:05 -0400	[thread overview]
Message-ID: <CAAZLhTcNsjzLdEZyzG+kEuDhVye8pnuf6VhWzP=G0NL_aFX-5w@mail.gmail.com> (raw)
In-Reply-To: <87lgs0cy0e.fsf@notabene.neil.brown.name>

>> *** Checking Backup Volume Header:
>> Unexpected Volume signature '  ' expected 'H+'
>
> Here the backup volume header, which is 2 blocks (blocks are 8K) from
> the end of the device, looks wrong.
> This probably means the chunk size is wrong.
> I would suggest trying different chunksizes, starting at 4K and
> doubling, until this message goes away.
> That still might not be the correct chunk size, so I would continue up
> to several megabytes and find all the chunksizes that seem to work.
> Then look at what else hpfsck says on those.

I'm not actually able to generate happy output in hpfsck using any of
the following multiples of 4K

4
[...]
8192
16384
32768
65536
131072
262144
524288
1048576
2097152

Any chance it's not really an HFS system at all?

  reply	other threads:[~2017-03-20 21:42 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-10 20:37 on assembly and recovery of a hardware RAID Alfred Matthews
2017-03-13 21:32 ` NeilBrown
2017-03-14 17:27   ` Alfred Matthews
2017-03-15  2:56     ` NeilBrown
2017-03-18 17:11       ` Alfred Matthews
2017-03-18 18:08         ` Alfred Matthews
2017-03-20  5:34           ` NeilBrown
2017-03-20 21:42             ` Alfred Matthews [this message]
2017-03-21  2:38               ` NeilBrown
2017-03-21 12:09                 ` Alfred Matthews
2017-05-03 15:44                   ` Alfred Matthews
2017-05-11 17:18                     ` Alfred Matthews
2017-05-11 22:27                     ` NeilBrown
2017-05-12 15:57                       ` Alfred Matthews

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