Hello,

I found a post at http://lkml.org/lkml/2005/11/30/189 where the author quotes a buffered disk reads at around 89 MB/sec (using hdparm).

I have a debian system with a Adaptec 19160 PCI card in it, and a Hitachi 149GB 15k rpm disk connected to it. My SCSI cable has a terminator at the end of the cable, and the disk is connected to the second last terminator (unfortunatly the last connector before the terminator didn't work out since a IDE harddisk prevented that to fit physically).

Now is my question: How do you ever get these speeds out of the disk/controller? I'm lucky when I reach 60 MB/sec, which is as fast as my HDC (IDE!!) drive at 7200 rpm:

debian:~# hdparm -tT /dev/hdc

/dev/hdc:
Timing cached reads: 2300 MB in 2.00 seconds = 1149.03 MB/sec
Timing buffered disk reads: 184 MB in 3.02 seconds = 61.00 MB/sec
debian:~#
debian:~# hdparm -tT /dev/sda

/dev/sda:
Timing cached reads: 2248 MB in 2.00 seconds = 1123.05 MB/sec
Timing buffered disk reads: 192 MB in 3.02 seconds = 63.48 MB/sec


Would you please help me out?


Thank you very much!!!