Path: utzoo!censor!geac!lethe!torsqnt!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!samsung!brutus.cs.uiuc.edu!psuvax1!wuarchive!texbell!merch!cpe!adaptex!neese
From: neese@adaptex.UUCP
Newsgroups: comp.unix.xenix
Subject: Re: How to choose SCSI
Message-ID: <7100035@adaptex>
Date: 16 Nov 89 20:47:00 GMT
References: <7100034@adaptex>
Lines: 30
Nf-ID: #R:adaptex:7100034:adaptex:7100035:000:1136
Nf-From: adaptex.UUCP!neese    Nov 16 14:47:00 1989


>	Does the Adaptec SCSI controller support both disks and tapes?
>How many devices can it support?  Ideally, I'd like to have two disks
>and one tape driver.  What kind of performance do you get with an Archive
>Viper with a SCSI interface?

The board itslef doesn't care what is hanging off of the cable.  You can have
up to 56 devices on the bus (7 targets,8 LUN's/target).  The operating
system is the real limitation.

Under MS-DOS:
With no drivers, the board supports the AT INT13 BIOS specification.  Which
only allows for 2 hard drives TOTAL in the system.  With the ASW-1140
SY-TOS package, you can have up to a total of 7 devices on the adapter.
They can be tape or HD's.

Under SCO 2.3GT XENIX:
You can have up to 4 devices on each host adapter.  The OS supports 2 host
adapters.  A mix of hard drives or tapes.

Under Novell 2.15:
With the ASW-1110 Novell driver, you can have up to 7 hard drives only.

Performance is relative to the operating system.  But you should get up
to 4MBytes/minute.

			Roy Neese
			Adaptec Central Field Applications Engineer
			UUCP @ {texbell,attctc}!cpe!adaptex!neese
				merch!adaptex!neese