On Tue, Nov 26, 2013 at 09:38:20PM -0500, Nathan Scott wrote:
> ----- Original Message -----
> > ...
> > It's trying to read/write 512 bytes at the beginning of the file which seems
> > reasonably innocuous. I double checked the man page which says that under
> > 2.6, O_DIRECT writes can be aligned to 512 bytes without a problem. sbp
> > comes
> > out with 4096 in blocksize and 512 in sectsize when zero_old_xfs_structures()
> > is called and the first error comes up, so I'm at a loss for what's going
> > wrong.
>
> The filesystem backing the new /root/image file doesn't support direct I/O?
>
> cheers.
The filesystem backing /root/image is xfs. Good guess though.
For the record:
caliban mnt # xfs_info /
meta-data=/dev/root isize=256 agcount=4, agsize=25685952 blks
= sectsz=4096 attr=2
data = bsize=4096 blocks=102743808, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal bsize=4096 blocks=50167, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
-Phil
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