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From: neese@adaptx1.UUCP
Newsgroups: comp.periphs.scsi
Subject: Re: Faster boot with AHA 1542 SCSI cont
Message-ID: <283400130@adaptx1>
Date: 31 May 91 00:35:50 GMT
References: <1992@styx.sta.sub.org>
Lines: 22
Nf-ID: #R:styx.sta.sub.org:1992:adaptx1:283400130:000:1074
Nf-From: adaptx1.UUCP!neese    May 30 09:49:00 1991


>/* ---------- "Faster boot with AHA 1542 SCSI cont" ---------- */
>Is there a way to shorten the boot time on a machine with an Adaptec SCSI
>controller? On my machine it takes almost a minute, an ESDI machine with
>the same autoexec and config is up in less then 15 seconds.

Consider this:
The 1542 has to figure what is out what is on the SCSI bus and then determine
which devices can be supported through the BIOS and then tell the system what
the parameters are for the drive, which we can't do until the drives are ready
on the SCSI bus.  A lot of this depends on the SCSI drive itself.  Some take
longer to become ready after a bus reset than others.  Some can take quite
a while, at power-up, to be ready.
An ESDI drive is in the CMOS table, so the system can make some assumptions.
1) The drive paramters are in the CMOS table. 2) There is a drive attached

The drive you are using on the SCSI bus will have the greatest impact.

			Roy Neese
			Adaptec Senior SCSI Applications Engineer
			UUCP @  neese@adaptex
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