From: Peter Kieser <peter@kieser.ca>
To: NeilBrown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: raid10: 6 out of 8 disks marked as stale on every restart
Date: Wed, 17 Dec 2014 22:26:47 -0800 [thread overview]
Message-ID: <549273A7.7070200@kieser.ca> (raw)
In-Reply-To: <20141218163632.6cb57524@notabene.brown>
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On 2014-12-17 9:36 PM, NeilBrown wrote:
> Curious.
>
> What does "mdadm --examine" report for each device immediately after boot,
> before you try assembling anything?
>
> Maybe also get the output just before you shut down to compare.
>
> NeilBrown
Sadly, I had to disassemble this array and get something workable that
didn't become unassembled on every restart. I did try sticking all
drives on the same AHCI controller, which caused the array to be
resynced on every restart instead of disassembled.
I suspect this issue is caused by bcache (I'm using the md as a backing
device for bcache.) The bcache maintainer states "get the md people or
someone to explain _what_ they want whatever has their device open to do
on reboot."
I'm going to setup a test environment and see if I can reproduce it again.
-Peter
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prev parent reply other threads:[~2014-12-18 6:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-12 17:04 raid10: 6 out of 8 disks marked as stale on every restart Peter Kieser
2014-12-18 5:36 ` NeilBrown
2014-12-18 6:26 ` Peter Kieser [this message]
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