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Re: interesting MD-xfs bug

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: interesting MD-xfs bug
From: Joe Landman <joe.landman@xxxxxxxxx>
Date: Thu, 09 Apr 2015 18:20:26 -0400
Cc: xfs <xfs@xxxxxxxxxxx>, linux-raid <linux-raid@xxxxxxxxxxxxxxx>
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On 04/09/2015 06:18 PM, Dave Chinner wrote:
On Thu, Apr 09, 2015 at 05:02:33PM -0400, Joe Landman wrote:
If I build an MD raid0 with a non power of 2 chunk size, it appears
that I can mkfs.xfs a file system, but it doesn't show up in blkid
and is not mountable.  Yet, using a power of 2 chunk size, this does
work correctly.   This is kernel 3.18.9.


[...]

That looks more like a blkid or udev problem. try using blkid -p so
that it doesn't look up the cache but directly probes devices for
the signatures. strace might tell you a bit more, too. And if the
filesystem mounts, then it definitely isn't an XFS problem ;)

Thats the thing, it didn't mount, even when I used the device name directly.

Good point on stracing though. I'll do that tomorrow and report back. Thanks!

Joe


Cheers,

Dave.

--
Joe Landman
e: joe.landman@xxxxxxxxx
t: @sijoe

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