Hi all,
I've got a HP machine here with a RAID5 + hot spare config. A friend has told me it seems to be very slow on the local disk and gave me a command to run :
"hdparm -t /dev/cciss/c0d0p3"
Running this I get :
Timing buffered disk reads: 80 MB in 3.84 seconds = 20.85 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device
Running the same command on another machine ( this just has 2 hdd's in RAID1 ) I get :
Timing buffered disk reads: 212 MB in 3.00 seconds = 70.67 MB/sec
Does anybody have any ideas as to why they're so different in speeds?
Thanks in advance.
I've got a HP machine here with a RAID5 + hot spare config. A friend has told me it seems to be very slow on the local disk and gave me a command to run :
"hdparm -t /dev/cciss/c0d0p3"
Running this I get :
Timing buffered disk reads: 80 MB in 3.84 seconds = 20.85 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device
Running the same command on another machine ( this just has 2 hdd's in RAID1 ) I get :
Timing buffered disk reads: 212 MB in 3.00 seconds = 70.67 MB/sec
Does anybody have any ideas as to why they're so different in speeds?
Thanks in advance.