Andreas Schnaiter wrote:
The two affected disks are connected to the Intel 82801GB/GR/GH (ICH7 Family)
Serial ATA Controller.
Disks on the Silicon Image/Intel IDE Controllers are not affected.
Linux 2.6.15.7
---
# time dd if=/benchfile of=/dev/null bs=1M
8192+0 records in, 8192+0 records out
8589934592 bytes (8.6 GB) copied, 130.547 seconds, 65.8 MB/s
real 2m10.670s user 0m0.023s sys 0m14.238s
Linux 2.6.16.2
---
# time dd if=/benchfile of=/dev/null bs=1M
8192+0 records in, 8192+0 records out
8589934592 bytes (8.6 GB) copied, 302.452 seconds, 28.4 MB/s
real 5m3.100s user 0m0.021s sys 0m40.521s
---
Slightly echoing Jeff G's question, but rephrasing for read,
could you try a read on the actual device? I.e. without
destroying your partition, you could try a direct read
from the device:
time dd if=/dev/sda of=/dev/null bs=1M count=8192.
BTW, how much memory do you have on the system?
Not that I have know much about block-i/o, but it
might narrow things down.
Have you tried the tests in single-user or run-level 1 to
help rule out other noise?
Linda
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