Originally Posted by
heise
See unofficial FAQ on hardware diagnostic. Maybe that shows the error.
No errors detected on any smart tests, but write speed issues persist. Rebooting the server and not running any programs the server may last a few days and slowly start to lose write speed. Read speeds are always ok.
I don't know if its the disk(s) or the raid that is the problem, but something is wrong.
Here is a test after server was rebooted for about 1 day:
# sync; dd if=/dev/zero of=tempfile bs=1M count=1024; sync
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 65.6433 s, 16.4 MB/s
/home#
(it has gone as low as 5MB/sec)
/home is raid 0
/ is raid 1
Both show just about the same write speeds when this occurs. Reboot from the cpanel will bring speeds back to normal for a period of a time.
After a reboot:
# sync; dd if=/dev/zero of=tempfile bs=1M count=1024; sync
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 6.03028 s, 178 MB/s
/home#
Any other things I Can try? or is it time for a ticket?