From: Phil Turmel <philip@turmel.org>
To: Marek <mlf.conv@gmail.com>, Linux-RAID <linux-raid@vger.kernel.org>
Subject: Re: Fwd: manually destriping a 4 drive raid5 with one missing drive
Date: Fri, 23 Oct 2015 13:49:39 -0400 [thread overview]
Message-ID: <562A7333.9010702@turmel.org> (raw)
In-Reply-To: <CA+sqOsY1Q4e3vNy4rmqjndsOStSGOg4JpqWBm4TTEvRdOmTkbQ@mail.gmail.com>
On 10/23/2015 12:20 PM, Marek wrote:
> Not sure if it's destrip or destripe but it's basically like puzzle
> you take a block from each drive according to the layout you are using
> e.g. Left symmetric and then write it down in that order computing
> missing blocks from parity blocks - this way you would write an image
> which you can mount without using mdadm. Data restoration companies
> are using this technique.
No special tool required. Obtain a new drive big enough to hold your
entire array and 'dd' from /dev/mdX to your new drive.
{ BTW: convention on kernel.org is to reply-to-all, trim unnecessary
context, and either bottom post or interleave your reply. }
Phil
next prev parent reply other threads:[~2015-10-23 17:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-16 18:58 manually destriping a 4 drive raid5 with one missing drive Marek
2015-10-17 22:54 ` Neil Brown
[not found] ` <CA+sqOsZJbvyAW6=CSG5EikhmDPt+Onjpm+VvBNPMKFmVi-ZQ8g@mail.gmail.com>
2015-10-23 9:26 ` Fwd: " Marek
2015-10-23 11:50 ` Alexander Afonyashin
2015-10-23 15:53 ` Piergiorgio Sartor
[not found] ` <CA+sqOsYBbOwn5tJfygAR0MDCQPpd4w61XPGBLv8Mme8cT_HL8A@mail.gmail.com>
2015-10-23 16:20 ` Fwd: " Marek
2015-10-23 17:49 ` Phil Turmel [this message]
2015-10-23 20:46 ` Marek
2015-10-23 21:30 ` Dragan Milivojević
2015-10-25 22:47 ` Phil Turmel
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