From: Phil Turmel <philip@turmel.org>
To: Dave Gomboc <dave_gomboc@acm.org>
Cc: linux-raid@vger.kernel.org
Subject: Re: raid10 recovery assistance requested
Date: Sun, 22 Sep 2013 23:27:13 -0400 [thread overview]
Message-ID: <523FB511.5070001@turmel.org> (raw)
In-Reply-To: <CA+dwz-2Me3g3udQh90k6EjCMjr+uqyoujCdMM9=tsKEnsmkzdA@mail.gmail.com>
On 09/22/2013 11:19 PM, Dave Gomboc wrote:
> [snipped]
>> However, based on the data you've reported, sda1 and sdc1 are identical,
>> down to the superblock bytes. And sdb1 and sdd1 are also identical,
>> down to the superblock bytes.
>>
>> Are you sure there were no misdirected "dd" operations?
>>
>> Phil
>
> I did not start using ddrescue until after I was no longer able to
> boot the raid array. When I did the ddrescuing, I specifically used
> the /dev/disk/by-id symlinks, not the sdX names, precisely in order to
> avoid accidents. I was extremely alarmed by the inability to boot the
> raid10, and took extra care to make sure I was doing it properly.
Ok.
If you'll generate the following for each member, we'll see what we can do:
dd if=/dev/sdX1 bs=512 skip=2048 count=16 2>/dev/null |hexdump -C
dd if=/dev/sdX1 bs=512 skip=3072 count=16 2>/dev/null |hexdump -C
(These will be smaller than the other report... which didn't make it to
the list.)
Phil
next prev parent reply other threads:[~2013-09-23 3:27 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-16 3:30 raid10 recovery assistance requested Dave Gomboc
2013-09-19 3:20 ` Dave Gomboc
2013-09-19 4:29 ` Stan Hoeppner
2013-09-20 5:29 ` Dave Gomboc
2013-09-22 17:15 ` Dave Gomboc
2013-09-22 21:52 ` Phil Turmel
2013-09-22 22:45 ` Dave Gomboc
2013-09-22 23:04 ` Dave Gomboc
2013-09-22 23:25 ` Phil Turmel
[not found] ` <CA+dwz-0eskPSQ44v0vgwfjwRpTbQaokQ3Q258Em1W2eRi1SO4w@mail.gmail.com>
2013-09-23 2:54 ` Phil Turmel
2013-09-23 3:19 ` Dave Gomboc
2013-09-23 3:27 ` Phil Turmel [this message]
2013-09-23 3:34 ` Dave Gomboc
2013-09-23 3:51 ` Phil Turmel
2013-09-23 4:04 ` Dave Gomboc
2013-09-23 4:12 ` Phil Turmel
2013-09-23 4:55 ` Dave Gomboc
2013-09-23 5:07 ` Dave Gomboc
2013-09-23 5:19 ` Adam Goryachev
2013-09-23 12:32 ` Phil Turmel
2013-09-23 12:57 ` Dave Gomboc
2013-09-24 0:29 ` Adam Goryachev
2013-09-24 5:55 ` Dave Gomboc
2013-09-28 15:47 ` Dave Gomboc
2013-09-28 16:01 ` Phil Turmel
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