But as you pointed out, it will slow it down. My boot
hard
disk is a wide SCSI drive, so I'd just as soon not have it drop back
to the SCSI-2 speed of the interface for my scanner, which is an
older Relisys Infinity Scorpio. I also use the narrow interface for
checking out smaller (40MB-1GB) SCSI hard disks that I pick up.
A narrow device *will not* slow down a wide bus.
Ok, you're telling me that if I have:
- a wide SCSI adapter, such as an Adapter 2940U2B, running at
40mhz and I have the adapter set to SCSI ID# 7
- a wide SCSI hard disk, such as an IBM DDRS-39130D, set at
SCSI ID# 0 and also running at 40mhz
The above settings are the default ID# for the 2940U2B and
ID# 0 is the factory default for the boot drive on the Macintosh both
are installed in. 15 total SCSI ID#'s available on the 2940U2B.
That if I add a narrow SCSI hard disk, take your pick,
running at the fast-SCSI rate of 10mhz, that it won't slow the wide
SCSI bus down? That goes contrary to what I've seen and I've seen
plenty of narrow drives have a problem running on a bus that much
faster. That's why Adaptec's PowerDomain Control software allows you
to manually tailor the bus speed to try and find a happy medium for
all the devices you have on the bus.
You're adding another variable. You're adding a disk at *10MHz*. If you
add a narrow disk at *40MHz* then it won't slow down the SCSI bus.
Peace... Sridhar
I'm not trying to be argumentative, but if
I'm
misunderstanding something, and have been for quite a long time if
that's the case, I'd like to be corrected.
Jeff
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