From: | Neil Bothwick |
Date: | 27 Jun 2001 at 15:57:27 |
Subject: | Re: SCSI hard drives.........BLAAAAAAAAAAAAAAAAACHHHHHHH!! |
Sean Courtney said,
> --- Neil Bothwick <neil@wirenet.co.uk> wrote:
>> A drive can be terminated even if it doesn't provide term power. Do
>> nooe
>> of the jumpers relate to termination?
> Don't know. The only thing the manual says about termination is that by
> default it's not terminated,
"by default" implies that it can be terminated. Check the docs or web
site for jumper details.
> termination comes from SCSI controller and
> cable. I guess for all practical purposes it's saying "You don't need
> it, so don't worry." [This is a Compaq drive, btw...]
Termination only comes from a terminator. Domn't confuse termination
with term pwr. The latter only supplies power for whichever active
terminators you use.
>> Your SCSI chain is only terminated at one end, you cannot expect it
>> to
>> work correctly. You also may not have any term power, the p5 CSPPC
>> didn't have it but I'm told that the DCE ones do.
> I'm pretty sure the MKIII I have is a Phase5. As for it not working
> correctly...seems to work fine when I DON'T have the drive connected...
"Seems to work fine" is not the same as working correctly. Especially as
you only have slow devices on the chain when the drive isn't there.
There is only one rule for termination.
"GET IT RIGHT OR IT WILL BITE YOU ONE DAY"
Consider yourself bitten. There's no point in trying to do anything with
your setup until you get the basic layout right.
Cheers
Neil
(A)bort (R)etry (T)ake an axe to it?
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