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From: rick@tmiuv0.uucp
Newsgroups: comp.periphs.scsi
Subject: Re: HP SCSI Hard drive problems (booting)
Message-ID: <2318@tmiuv0.uucp>
Date: 31 Jan 91 10:41:04 GMT
References: <718@faatcrl.UUCP> <1991Jan28.232944.10071@raid5.uucp>
Organization: Technology Marketing Inc., Irvine, CA
Lines: 36

In article <1991Jan28.232944.10071@raid5.uucp>, kenw@raid5.uucp (Ken Waletzki) writes:
>>Hi,
>>
>>Our organization recently got two HP 1.2 GB SCSI2 drives.  They are strange
>>critters!
>>
>>After finding a SCSI ID which SUNOS liked, and getting the other jumpers
>>for other things set properly, Sun's format command finally noticed it.  But 
>>when I attempted to low-level format the drive, it returned an error 
> 
>  [stuff deleted]
> 
> We just got a bunch of HP drives in, and the little critters send out an
> SDTR message on power up and SCSI bus reset.  This might have a problem with
> the initiator software, if it isn't programmed to receive and unsolicited
> SDTR message.  Furthermore, the manual says to remove a certain jumper to 
> dis-allow the sending of the SDTR message, but it don't work.  The darn thing
> sends SDTR with or without the jumper on.

Yes, most drives for use with Sun workstations use modified ROMs on the
drive, to adapt them for Sun's SCSI oddities.  Seems that Sun's OS doesn't
quite do things the real SCSI way.  I've run into tape drives and disks that
have such weirdness when used with Suns.  However, if I plug them into my
Amigas (a 2500/30 with HardFrame or A3000), they run just fine, thank you.
The drives I've played with are straight Conner CP340s and 3200s, Seagate
ST-296Ns (yeech!), Miniscribes, Wrens, and a Wangtek 5150S SCSI 1/4" tape.
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|[- O] Rick Stevens                                                        |
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