Path: utzoo!attcan!uunet!wuarchive!sdd.hp.com!hplabs!otter.hpl.hp.com!hpltoad!hpcpbla!stevej
From: stevej@hpcpbla.HP.COM (Steve Jerman)
Newsgroups: comp.sys.hp
Subject: Re: DAT on 9000/835
Message-ID: <9740001@hpcpbla.HP.COM>
Date: 24 Oct 90 16:15:16 GMT
References: <1990Oct22.153242.5645@morrow.stanford.edu>
Organization: HP Computer Peripherals Bristol, UK
Lines: 48

Hi Bob,
 Here's the information you wanted:

    a) The HPIB version of our DAT drive is supported
    in 1/2 inch emulation mode for Unix 7.0 on the 600 and 800 series
    HP-UX systems. This means that the drives looks to the Operating
    System just like a 7980 1/2 inch tape drive. There is an
    application note available (P/N C1511-90906) which describes this
    and tells you how to get everything working. From HP-UX 8.0 full
    support for the drive will be available. Note that the emulation
    mode is just to fool the operating system, it does not mean that
    the tape formats are different or anything, so you will be able to
    restore your tar/cpio backups when you get 8.0. The only caveats I
    am aware of (these apply to emulation mode only!) are:

       o Fast-search is not available
       o write appends are not supported ( ie writes after reads)
       o record sizes > 64K
       o Use of the device with no rewind option set not supported

    The above gotcha should not prevent you from using the drive for
    unattended backup, and having 1.3 Gigabytes to play with normally
    means you don't have to change tapes too often.
       
    b) On the 300 series, there is full support for both the HPIB and
    SCSI versions of the DAT drives. There is an application note P/N
    C1511-90905 (shipped with the drives) which explains how to use
    both the drives with the 300 series. Incidently the DAT drive is
    available is an option (#3) in the C2212A and C2213A mass-storage
    subsystems (adding one to these systems is cheaper than buying a
    standalone box).

    The part numbers for the drives are:
	HPIB DDS: C1511A
	SCSI DDS drive: C1512A
	
Steve Jerman
Hewlett Packard
Computer Peripherals Bristol

Address:	     Email:
  Filton Road		stevej@hpcpbla.bri.hp.com
  Stoke Gifford
  Bristol
  BS12 6QZ
  UK

NOTE: The above are my opinions and not necessarily those of my employer.