[4746] in linux-scsi channel archive
Re: Really Ssslllllooooooowwwwwww lilo load of kernel. (fwd)
daemon@ATHENA.MIT.EDU (Kim-Ee Yeoh)
Mon Sep 28 05:47:04 1998
Date: Mon, 28 Sep 1998 04:44:26 -0500 (CDT)
From: Kim-Ee Yeoh <yeoh@cs.wisc.edu>
To: "Mr. James W. Laferriere" <babydr@baby-dragons.com>
cc: Linux Scsi maillist <linux-scsi@vger.rutgers.edu>
In-Reply-To: <Pine.LNX.3.96.980927212339.348B-100000@filesrv1.baby-dragons.com>
On Sun, 27 Sep 1998, Mr. James W. Laferriere wrote:
> tester instead of bonnie . Using 'hdparm -tT /dev/sda1'
> the Wide drive gets 'buffered disk reads' from 6.71 to
> 6.75 MB/s, the narrow drive sdb1 gets 3.61 to 3.66 MB/s
> The above isn't a real test such as bonnie . these still
> seem a bit slow for a drive/controller comb. capable of
> bursts to 20 MB/s .
The controller may be capable of 20 MB/s, but I doubt the drive is.
People have seen over 10 MB/s sustained transfer rates with 10,000rpm
Cheetahs (can anyone give a more precise figure?) but I've never
encountered anything at the 20 MB/s level. The SCSI specs for my
UltraWide Seagate Hawk 2XL, which is pretty old, I must admit, gives a
maximum throughput of about 7 MB/s, and actually averages only at about 3
or 4 MB/s, if I remember correctly.
-- Kim-Ee
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
