On Tue, 25 Nov 2008, Stian Jordet wrote:
ma., 24.11.2008 kl. 04.50 -0500, skrev Justin Piszcz:
While there still may be something else wrong, the first problem I see is
your sunit and swidth are set to 0.
Please read, a good article on what they are and how to set them:
Oh, this was new to me. But the setting didn't change anything. I can
copy one large file between the xfs and ext3 disk (both ways), and I get
speeds between 160 and 200 MB/s. But unpacking the kernel source takes
between 5 and 10 minutes on the xfs disk, and a mere 15 seconds on the
ext3... (and it also used to take between 5 and 10 minutes when I had
xfs on the raid0, so it doesn't seem to be hardware related...)
If anyone has anything more I can try before I do the lengthy process of
backup 1TB, reformat and restore...
When you 'unpack the kernel source' ext3 will cache it etc, best way to
where cmd is: bash -c 'tar xvf file.tar; sync'
Make sure its a tar and not gzip/bzip2 (limited by CPU/etc)
The other option is the relatime you stated, use this instead:
then tell me what you get
(instead of relatime)