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These are my results. Which I'm really not happy with and any help would be greatly appreciated.
120GB Western Digital ATA100 8MB buffer 7,2k rpm. It's about 1 years old, perhaps a little more.
Before "hdparm -c 1 -d 1 -k 1 /dev/hda":
[14:59 root@atheisticfaith anti]# hdparm -t /dev/hda
Timing buffered disk reads: 10 MB in 3.50 seconds = 2.86 MB/sec
While issuing the "hdparm -c 1 -d 1 -k 1 /dev/hda command" I got this output:
[14:59 root@atheisticfaith anti]# hdparm -c 1 -d 1 -k 1 /dev/hda
setting 32-bit IO_support flag to 1
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
setting keep_settings to 1 (on)
IO_support = 1 (32-bit)
using_dma = 0 (off)
keepsettings = 1 (on)
This is not too cool, right? What can I do to fix this?
And after this command, I got almost double the results, even though it didn't work completely:
[15:03 root@atheisticfaith anti]# hdparm -t /dev/hda
Timing buffered disk reads: 18 MB in 3.26 seconds = 5.53 MB/sec
While trying this command on my other 40GB, three years old hd (specifications unknown) I get the same output.
[15:07 root@atheisticfaith anti]# hdparm -t /dev/hdb
Timing buffered disk reads: 10 MB in 3.12 seconds = 3.20 MB/sec
[15:13 root@atheisticfaith anti]# hdparm -t /dev/hdb
Timing buffered disk reads: 16 MB in 3.07 seconds = 5.22 MB/sec
Any help would be greatly appreciated. A note regarding my hds: I experience serious performance loss while transfering data between partitions. Everything gets really chunky and lags like hell so the computer really isn't usable during the transfer, this is not the norm, is it?
Red Hat Enterprise Linux ES 3.0
Intel D875PBZ motherbaord http://intel.com/design/motherbd/bz/...herbd_d875pbz&
raid 1 running 2 Maxtor 60GB 7200RPM SATA Hard Drive, Model 6Y060M0
This is a linux software raid 1 setup, I dissabled the hardware raid in the bios on the MOBO.
Not very impressed with the results. I was expecting to get more out of the disk reads on this SATA setup. But it does seem to be faster on the cache reads. So maybe someone can explain here what is more important when messuring speed the cache or the disk reads?
[root@mail1 joe]# /sbin/hdparm -tT /dev/sda
Timing buffer-cache reads: 3712 MB in 2.00 seconds = 1856.00 MB/sec
Timing buffered disk reads: 152 MB in 3.01 seconds = 50.50 MB/sec