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From: lampi@polari.UUCP (Michael Lampi)
Newsgroups: comp.sys.apollo
Subject: Re: HP 9000 series 400 disks
Summary: Somewhat easier than with DN-2500
Keywords: SCSI disks
Message-ID: <2752@polari.UUCP>
Date: 16 Nov 90 19:55:35 GMT
References: <9011152114.AA03708@richter.mit.edu>
Organization: MDL Corporation, Bellevue, WA (206) 643-7333
Lines: 25

In article <9011152114.AA03708@richter.mit.edu> krowitz@RICHTER.MIT.EDU (David Krowitz) writes:
>Has anyone tried connecting a non-HP SCSI disk to a series 400 machine?
>Is the SCSI disk driver for the new machines as willing as the DN2500's
>driver to accept almost any old SCSI disk you care to plug into the port?
>
> -- David Krowitz

The series 400 machines are actually more robust with their implementation of
SCSI than the DN-2500. For example, at ADUS I had a 9000 400t with an internal
200 meg Rodime, cabled to an external removable 200 meg Rodime, cabled to
three fixed 660 meg drives, terminated there and connected to a removable
660 meg drive. A total of 25 feet of SCSI cabling, improperly terminated.
(Why didn't I terminate it at the end? Because I forgot to bring the proper
terminator for the SCSI connector on the removable 660. :( ).

Anyway, the whole thing worked perfectly, even to the point of being able to
dismount, power off and remove the removable drives while the system was up
and running, and then to insert the drives and remount them!

Of course, it helps to use good cables, connectors, etc., but I see fewer
problems with the 9000 series 400 and different manufacturer's drives than I
do with the 2500. Software wise, it seems more robust, too.

Michael Lampi   MDL Corporation   (206) 643-7333    FAX (206) 643-5080
                2667 170th Avenue SE    Bellevue    WA  98008