From: Andreas Klauer <Andreas.Klauer@metamorpher.de>
To: Claudiu Rad-Lohanel <jazzman@misalpina.net>
Cc: Phil Turmel <philip@turmel.org>, linux-raid@vger.kernel.org
Subject: Re: recovering failed and unrecognizable RAID5 during mdadm --grow without backup
Date: Fri, 13 May 2016 16:39:23 +0200 [thread overview]
Message-ID: <20160513143923.GA23787@EIS.leimen.priv> (raw)
In-Reply-To: <3b4ae5f5-af19-744b-cab3-aad317ea3a82@misalpina.net>
On Fri, May 13, 2016 at 05:26:02PM +0300, Claudiu Rad-Lohanel wrote:
> 1. i can't find any documentation anywhere about the --revert-reshape
> option. how should the command look like? is it available in v3.3.2?
IIRC it's --assemble --update=revert-reshape and it's not mentioned
in the man page...
> 2. is it safe?
Theoretically...
You could do this with overlays.
https://raid.wiki.kernel.org/index.php/Recovering_a_failed_software_RAID#Making_the_harddisks_read-only_using_an_overlay_file
That's what I'd also recommend when running fsck...
all of these things write on your disks without providing an undo function.
Regards
Andreas Klauer
next prev parent reply other threads:[~2016-05-13 14:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-12 6:22 recovering failed and unrecognizable RAID5 during mdadm --grow without backup Claudiu Rad
2016-05-12 18:58 ` Phil Turmel
2016-05-12 20:09 ` Claudiu Rad-Lohanel
2016-05-12 20:23 ` Phil Turmel
[not found] ` <7cf56631-7909-6a92-f0b2-05dd02722ee8@misalpina.net>
2016-05-13 14:04 ` Phil Turmel
2016-05-13 14:11 ` Phil Turmel
2016-05-13 14:26 ` Claudiu Rad-Lohanel
2016-05-13 14:39 ` Andreas Klauer [this message]
2016-05-13 15:33 ` Claudiu Rad-Lohanel
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