SCSI Bus Problem?

From: Sellam Ismail <foo_at_siconic.com>
Date: Mon Feb 11 04:44:42 2002

On Mon, 11 Feb 2002, Jerome Fine wrote:

> Sellam - this one is racked in a tower box as well with TEN 5 1/4"
> half height drive bays - is that what you are using? I can't begin
> to imagine TEN 5 1/4" FULL HEIGHT drive bays, but if that
> is what you really meant, then I guess this box is only half the size.

No, I have 10 half-height 5.25" drive bays. 10 full height would actually
be 20 half-height, which would be insane :)

> I have been able to do the following with a single internal SCSI cable that
> is terminated via an active external terminator (#1 configuration):
> SCSI hard drive #0 FAT32 - ID=0
> SCSI hard drive #1 FAT32 - ID=1
> SCSI hard drive #2 FAT32 - ID=2
> SCSI Iomega Zip Drive - ID=4
> SCSI CDROM Drive #0 - ID=5
> SCSI CDROM Drive #1 - ID=6
> It all boots and work fine under W98.

I'm going to use SCSI Wide so I can get up to 15 devices on the chain.

> Hint: If I attempt to boot with the same configuration as #2 (i.e. with
> the 3 Sony drives attached via the external cable) but now with the
> 3 Sony drives turned off and the 3 SCSI hard drives turned on, I also
> can't boot - i.e. if I want to be able to switch between the Sony drives
> and the SCSI hard drives, I must boot with the Sony drives powered
> on and the SCSI hard drives powered off - and the SCSI CDROM
> drives removed from the SCSI internal cable.

Probably has something to do with termination on the various combination
of devices. Even devices that are not powered up can still supply
termination as far as I know.

Sellam Ismail Vintage Computer Festival
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Received on Mon Feb 11 2002 - 04:44:42 GMT

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