I installed a Promise SuperTrak SX6000 on my RedHat 9 system(kernel version 2.4.27).
I am using pti_st driver from Promise web site.

I felt extemely poor performance.
What's the problem?
Anyone else got the same problems or any hints to make it work properly?

following shows hdparm test.

hda: IBM-DTTA-351010, ATA DISK drive (10GB)
hdc: WDC WD2000JB-00FUA0, ATA DISK drive (200GB, almost same performance as Maxter 200GB)
sda: Maxter 200GB 8MB Buffered 6 drives (RAID-5)

[root@rozy root]# hdparm -Tt /dev/hda
/dev/hda:
Timing buffer-cache reads: 128 MB in 1.03 seconds =124.27 MB/sec
Timing buffered disk reads: 64 MB in 5.64 seconds = 11.35 MB/sec
/dev/hda:
Timing buffer-cache reads: 128 MB in 0.93 seconds =137.63 MB/sec
Timing buffered disk reads: 64 MB in 5.65 seconds = 11.33 MB/sec

[root@rozy root]# hdparm -Tt /dev/hdc
/dev/hdc:
Timing buffer-cache reads: 128 MB in 0.95 seconds =134.74 MB/sec
Timing buffered disk reads: 64 MB in 1.43 seconds = 44.76 MB/sec
/dev/hdc:
Timing buffer-cache reads: 128 MB in 0.92 seconds =139.13 MB/sec
Timing buffered disk reads: 64 MB in 1.57 seconds = 40.76 MB/sec

[root@rozy root]# hdparm -Tt /dev/sda
/dev/sda:
Timing buffer-cache reads: 128 MB in 0.97 seconds =131.96 MB/sec
Timing buffered disk reads: 64 MB in 4.13 seconds = 15.50 MB/sec
/dev/sda:
Timing buffer-cache reads: 128 MB in 0.93 seconds =137.63 MB/sec
Timing buffered disk reads: 64 MB in 4.22 seconds = 15.17 MB/sec