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Re: FastSCSI on WarpEngine

On Mon, Mar 03, 2003 at 03:55:00AM +0100, Ingo Juergensmann wrote:
> Usually I only get around 2 MB/s from disks, either via scsi0 or scsi1.
> Using a raid0 on scsi0 *or* scsi0 doesn't improve speed at all, but raid0 on
> scsi0 *and* scsi1 do (of course, using sdb and sdc), giving a total speed of
> roughly 3 MB/s, which is not as speedy as it could be, even with 5 MHz
> transfers instead of 10 MHz. 
> So, the question is: 
> Has someone tried to run the NCR on the WarpEngine with 10 MHz transfers
> successfully? All disks are 7200 rpm except the Seagate ST43400N (sdf), so I
> guess the disks are fast enough. 
> Regarding to the above text from kernel source, it might get parity errors
> with 10 MHz, but how "dangerous" is this?

silent data corruption, that may be very nasty. You would need a few
days of stresstesting to figure out.

I don´t think 2 MB/s is so bad on m68k, there are probably other 
factors than won´t let it go much faster anyway.


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