On Tue, Nov 26, 2013 at 06:41:19PM -0800, Phil White wrote:
> 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
Yup, there's your problem.