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From: norsk@sequent.uucp (Doug Thompson)
Newsgroups: comp.periphs.scsi
Subject: Problems with Adaptec 1542B and Seagate ST-251N
Message-ID: <46492@sequent.UUCP>
Date: 14 Nov 90 22:10:44 GMT
Sender: norsk@sequent.UUCP
Distribution: na
Organization: Sequent Computer Systems, Inc.
Lines: 43

After considable effort to solve this problem the old fashioned
way (calling one vendor, then the other, each pointing the finger
at the other) and understanding the problems of SCSI components
working together, I am asking for help from the group.

Situation:
	I purchased a ST251N and ST01 some 18 months ago. It worked
	just fine. Then I recently purchased an AHA-1542B and a problem
	shows up. The drive fails the VERIFY cmd (op=2Fh) in that
	the drive light stays on and the onboard (and the device
	driver from adaptec wo/BIOS on) times out indicating the
	VERIFY cmd failed. The light remains on until reset.
	This occurs trying to utilize both my FXPREP partitioning
	prgram from Tandon and Adaptec's AFDISK.

	Now this drive FORMATS fine, with differing interleaves,
	reads and writes (with my own built driver to the
	AHA-154xx) and to my own driver under an older XENIX
	that didn't support the adaptec board.

	Now, Seagate says they will  'repair' the board for $180 which
	is just a board replacement, etc, and that their drives
	support VERIFY. Adaptec says "Sorry to hear about that"
	and my distributors service line (Wyle Labs in Orange county)
	says, "It should work".

	I am not flaming any here, just telling facts.

Question:
	Has anyone else had this problem or heard of it?
	Any suggestions?
	Any other data points I could use in determining the problem?

	I don't wish to not use the drive. Its a good 40M drive and
	it will be a little while before I can get some bigger
	SCSI drives.

thanks in advance.

Douglas Thompson		UUCP: ..{tektronix,ogicse,uunet}!sequent!norsk
				Internet:	norsk@sequent.com
"The scientist builds to learn; the engineer learns in order to build."  
Fred Brooks