* xen DomU image on RAID5 + XFS causes issues with tap:aio
@ 2010-04-26 20:05 netwiz
0 siblings, 0 replies; 2+ messages in thread
From: netwiz @ 2010-04-26 20:05 UTC (permalink / raw)
To: xen-devel
Hi all,
Firstly, I'm not subscribed to this list so please CC me into replies.
Upon bashing my head against a wall trying to get Xen working on my new
hardware I came across an interesting discovery. Every install using
virt-install was failing and I could only use the file: access method for
my DomUs. Every time I tries to use tap:aio the guest would error on boot
saying it couldn't find the root partition.
My system is as follows:
OS: CentOS 5.4
Xen: 3.0.3-94.el5_4.3
/ = 2 x 80Gb HDDs, dmraid1, ext3
/mnt/raid = 3 x 1Tb HDDs, dmraid5, xfs
On whim, I moved the DomU images from /mnt/raid/vm-images to /vm-images
and instantly tap:aio worked again.
This brings me to my question:
Why would tap:aio fail when the images are on an XFS/RAID5 filesystem but
work correctly when on a RAID1/ext3 filesystem?
To me, this seems like a bug.
--
Steven Haigh
http://www.crc.id.au
^ permalink raw reply [flat|nested] 2+ messages in thread
* xen DomU image on RAID5 + XFS causes issues with tap:aio
@ 2010-04-26 20:07 Steven Haigh
0 siblings, 0 replies; 2+ messages in thread
From: Steven Haigh @ 2010-04-26 20:07 UTC (permalink / raw)
To: xen-devel
Hi all,
Firstly, I'm not subscribed to this list so please CC me into replies.
Upon bashing my head against a wall trying to get Xen working on my new
hardware I came across an interesting discovery. Every install using
virt-install was failing and I could only use the file: access method for
my DomUs. Every time I tries to use tap:aio the guest would error on boot
saying it couldn't find the root partition.
My system is as follows:
OS: CentOS 5.4
Xen: 3.0.3-94.el5_4.3
/ = 2 x 80Gb HDDs, dmraid1, ext3
/mnt/raid = 3 x 1Tb HDDs, dmraid5, xfs
On whim, I moved the DomU images from /mnt/raid/vm-images to /vm-images
and instantly tap:aio worked again.
This brings me to my question:
Why would tap:aio fail when the images are on an XFS/RAID5 filesystem but
work correctly when on a RAID1/ext3 filesystem?
To me, this seems like a bug.
--
Steven Haigh
Email: netwiz@crc.id.au
Web: http://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897
Fax: (03) 8338 0299
^ permalink raw reply [flat|nested] 2+ messages in thread
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