Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hplabs!hpfcdc!hpfinote!den
From: den@hpfinote.HP.COM (Don Novy)
Newsgroups: comp.sys.hp
Subject: Re: Hard drive information
Message-ID: <15480001@hpfinote.HP.COM>
Date: 25 Apr 89 22:35:05 GMT
References: <13881@louie.udel.EDU>
Organization: Hewlett Packard CICD
Lines: 28


  The HP9133 drives CAN be upgraded. I have 3 of them that I have upgraded to
40 Mbytes each. You need to replace the old hard drive mechanism with a
Seagate ST-4051 and change a jumper on the controller board.

  Two of the drives I had used Seagate ST-419 and ST-225 drives. These are the
ones I upgraded. Be careful to record the existing jumper settings BEFORE
changing them in case you have trouble with the upgrade.

  For a rev B controller board, set the jumpers to EBxH. For a rev C controller
board, set the jumpers to EBxD. 'x' indicates leaving that jumper unchanged as
that jumper tells the controller if a floppy drive is present and should not be
changed.

  Also note the jumper that says 256/1024. That affects the physical sector size
of the hard disk. Changing it to 1024 bytes/sector will increase the amount of
storage available. If you store a lot of small files (<1024 bytes) this may not
be a good idea as it will actually waste space.

  I use these drives with an HP PACAL workstation and have had no problems.
They should also work with any HP system as this upgrade converts the drive to
a 9133L which should be supported.

  Feel free to email any questions.

  Don Novy
  Hewlett-Packard
  den@hpfijbj.hp.com