6 May
1999
6 May
'99
1:29 p.m.
On Thu, 6 May 1999, Chuck McManis wrote:
2) What termination requirements are there on DSSI
disks? I powered up the
two RF71's and the KQSFA DSSI controller in the BA213, they spun up and the
ready lights were on but when UNIX probed the controller it saw only one
drive and when I tried to read that drive its FAULT light started flashing.
The cabinet is set up to connect the card to a ribbon cable that connects
both drives and then ends at a funky high density connector (looks a lot
like SCSI-2).
If you're running Unix, you probably will want to check the ALLOCLASS and
UNITID portions of the failing unit in the DSSI PARAMS configuration via
SET HOST /DUP/DSSI [node#] from your >>> prompt.
My experience on a mips DEC5400 suggests that unix (in my case, Ultrix)
does not like a non-zero allocation class and it likes the UNITID of the
drive to match that of the plug. Also keep in mind that you'll have to
add some entries similar to this into your kernel for it to recognize new
drives or previously unused controllers:
controller dssc1 at msi0 msinode 1
controller dssc2 at msi0 msinode 2
disk ra1 at dssc1 drive 1
disk ra2 at dssc2 drive 2
You didn't mention if your unix was Vax ultrix or a bsd port, so your
specifics may vary.
Paul