From: rolfkap@engin.umich.edu (Rolf Kappe)
Newsgroups: comp.sys.hp
Subject: Re: Connecting a Seagate Wren 1.9 GB Disk
Followup-To: comp.sys.hp
Date: 26 Jan 1993 23:51:49 GMT
Organization: University of Michigan Engineering, Ann Arbor
Distribution: world
NNTP-Posting-Host: minion.engin.umich.edu
Keywords: Wren9 Wren Seagate

>stuart@fawlty.towers.oz.au (Stuart Walker)
>We've just gotten hold of an HP-9000 (model 870 ??), and we're trying to
>connect a Seagate Wren 9 1.9 GB disk.  I certainly can't configure it through
>'sam', there is no entry for it in /etc/disktab, and there are no disks in
>/etc/disktab that have specs close enough to allow an acceptable alias.
>
>So, has anyone out there attached one of these, or any other non-HP disk ?
>And how the hell do you do it.  I'm in the process of placing an entry in
>/etc/disktab for the Wren, but I'm not sure what number the disk is recognised
>as.  I presume it's something like  ST42100N or some similar model number-like
>string.  Where is this string recognised from?  Does it come from the id-string
>sent back from the disk ??  I was speaking to HP and they were implying that
>if I couldn't get an accurate alias for the drive, then it WOULDN'T WORK.
>
>Any help would be appreciated.
>
>Thanks,
>
>Stuart
>
>-- 
>_______________________________________________________________________________
>Internet: stuart@fawlty.towers.oz.au			  Phone: +61 2 427 2999
>UUCP:     uunet!fawlty.towers.oz.au!stuart		  Fax:   +61 2 427 7072
>Snail:    Tower Technology

We have installed these disks on 9000/730 running 8.07, and this
is how do do it.  You can find out the alias for the disk like this:

isaac % /etc/diskinfo /dev/rdsk/5s0
SCSI describe of /dev/rdsk/5s0:
             vendor: SEAGATE 
         product id: ST42100         
               type: direct access
               size: 1900538880 bytes
   bytes per sector: 512

Where the disk is at SCSI ID 5.
The product ID is the alias.  In /usr/sam/lib/disk_aliases, put the following:
ST42100		SEAGATE_WREN9	scsi	single_ended_scsi
Thus, sam will look for an entry in disktab with the name SEAGATE_WREN9.
On our machine, the entries look like this:
SEAGATE_WREN9_noswap:\
        :No swap or boot:ns#48:nt#15:nc#2568:\
        :s0#1848960:b0#8192:f0#1024:\
        se#512:rm#3600:
SEAGATE_WREN9_noreserve:\
	:No swap or boot:ns#48:nt#15:nc#2568:\
	:s0#1848960:b0#8192:f0#1024:\
	se#512:rm#3600:
SEAGATE_WREN9:\
        :No swap or boot:ns#48:nt#15:nc#2568:\
        :s0#1848960:b0#8192:f0#1024:\
        se#512:rm#3600:

SAM works like a charm after this.  I am not familliar with the 800 series,
but I hope this helps.  
P.S.  The numbers for the disktab are from the output from a DEC using
rzdisk.  Anyone know of an HP program that gives similar output ???
When you are all done, it should look like this.

isaac % bdf
Filesystem           kbytes    used   avail capacity Mounted on
/dev/dsk/6s0         246049  188237   33207    85%   /
/dev/dsk/5s0        1805149  376303 1248331    23%   /l
-------------------------------------------------------------------------
Rolf Kappe, Peon 1st class
Computer Aided Engineering Network, University of Michigan
rolfkap@engin.umich.edu
Newsgroups: comp.sys.hp