Bad SATA (Sil 3112A) performance with kernel 2.6.8

[Andrey Andreev]

James Wilkinson wrote:

>>[andrei at brie andrei]$ sudo /sbin/hdparm -t -T /dev/sda
>>/dev/sda:
>> Timing buffer-cache reads:   1564 MB in  2.00 seconds = 780.95 MB/sec
>> Timing buffered disk reads:   44 MB in  3.12 seconds =  14.11 MB/sec
>>
>>Which is pretty awfuly slow, compared to 2.6.6 (over 50 MB/sec). 
> 
> 
> Slow enough for PIO: what does hdparm -d /dev/sda report?

/dev/sda:
  operation not supported on SCSI disks

I noticed that hdparm is not really very useful on SCSI disks. What'd be 
its equivalent for SCSI?

//Andro