[WBEL-users] SCSI 2120S card

[Denis Croombs]

I am using an Adaptec 2120S (raid 5) but in the DMESG it is being found as
a:-

scsi1 : aacraid
scsi0 : aacraid
blk: queue c4c41218, I/O limit 4095Mb (mask 0xffffffff)
  Vendor: ADAPTEC   Model: Raid 5 Win2003    Rev: V1.0
  Type:   Direct-Access                      ANSI SCSI revision: 02
blk: queue c4c41018, I/O limit 4095Mb (mask 0xffffffff) Attached scsi disk
sda at scsi0, channel 0, id 0, lun 0 SCSI device sda: 286714368 512-byte
hdwr sectors (146798 MB) Partition check:
 sda: sda1 sda2 sda3

The real problem is that the disk transfer rate is approx 20% of a 10year
old SCSI system and this new system uses SCSI 320 10k disks and it should be
faster not slower.

When I run /sbin/hdparm -tT /dev/sda /dev/sda I get:-

/dev/sda:
 Timing buffer-cache reads:   2756 MB in  2.00 seconds = 1378.00 MB/sec
 Timing buffered disk reads:   68 MB in  3.00 seconds =  22.67 MB/sec

/dev/sda:
 Timing buffer-cache reads:   3104 MB in  2.00 seconds = 1552.00 MB/sec
 Timing buffered disk reads:   68 MB in  3.04 seconds =  22.37 MB/sec

Has anyone any clues as to how to improve it.

This is a clean Whitebox 3.3 I386 install on dual Opteron Tytan system and
the CPU side is OK, just the disk access is bad.

Thanks

Denis Croombs