Re: UDB SCSI Problem

Tim Bosinius (bosinius@beuel.rhein.de)
Sat, 26 Oct 1996 13:18:10 +0100

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> The driver is probably configured for 10 MHz scsi synchronous
negotiation.
> After boot up, you can increase the sync period or set asynchronous
> transfer mode for your hard disk.
>
> The command that allows to change synchronous parameters for a device is:
>
> echo "setsync #target period" >/proc/scsi/ncr53c8xx/0
>
> - echo "setsync 0 255" >... renegotiate asynchronous transfer with target
0
> - echo "setsync 0 50" >... 5 MHz synchronous transfer
> - echo "setsync 0 25" >... 10 MHz synchronous transfer (max speed)
>
Thank you for your help. It works when I select the 5Mhz sync transfer
mode.
I believe the problem I had derives from the standard RedHat-4.0 Kernel.
When Milo starts it tells me that it uses 5 Mhz sync mode. The 2.0.18
Kernel uses 10 Mhz sync mode and crashes during install. On my other UDB I
used another Kernel on boot up and it runs stable.

NT4.0 uses 5 Mhz sync mode and is extremly slow when installed on
the internal 2,5" Toshiba disk. If you ever think about installing NT make
sure
you have a fast SCSI disk... :) and lots of RAM (the workstation runs with
40 Megs,
the server desires 64 and more to run at its best.)

Regards
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Tim Bosinius bosinius@beuel.rhein.de
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Next message: Scott Manley: "Re: Alpha C/C++ performance"
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Maybe in reply to: Tim Bosinius: "UDB SCSI Problem"