Sata Hard Drive Optimization, How...?

On my server P IV 3GHz (HT enabled) I have 2x200GB sata HD and I have very very high load and 85% IOWAIT, IDLE 0%!

Also I have 2GB RAM, swap 0K used!

Centos 3.5, cPanel...

I don`t know why but "hdparm -i /dev/sda" don`t work:
/dev/sdb:
operation not supported on SCSI disks

(but I don`t have SCSI disks)

Can I on some other way check my hard drives informations?

Here is speed test:

hdparm -Tt /dev/sda

/dev/sda:
Timing buffer-cache reads: 2924 MB in 2.00 seconds = 1462.00 MB/sec
Timing buffered disk reads: 82 MB in 3.05 seconds = 26.89 MB/sec

hdparm -Tt /dev/sdb

/dev/sdb:
Timing buffer-cache reads: 2996 MB in 2.00 seconds = 1498.00 MB/sec
Timing buffered disk reads: 2 MB in 31.41 seconds = 65.20 kB/sec


From this you can see that my Hard Drive 2 work very slow and I think this HD generate this IO problem (this is on working server)...

hdparm /dev/sda

/dev/sda:
readonly = 0 (off)
geometry = 24321/255/63, sectors = 390719855, start = 0

hdparm /dev/sdb

/dev/sdb:
readonly = 0 (off)
geometry = 24321/255/63, sectors = 390721968, start = 0


Can I on some way optimize this HDs for better speed?

Thanks.

 

 

 

 

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