[Info-vax] HZS70 Unit number question

[bill.hall at nav-international.com]

On Apr 24, 12:07 pm, "Jeffrey H. Coffield"
<jeff... at digitalsynergyinc.com> wrote:
> I have two Alphas (not clustered) connected to a HSZ70 that currently
> has units D0 through D5 showing as DKC0 through DKC5. DKC0 through DCK4
> are mounted on one system and DKC5 is mounted on the other.
>
> I have added some disks and want to add some new units but am concerned
> about the SCSI disk numbering and the unit numbering. AFAIK the SCSI
> controller takes a unit number (usually 7) so you could only have DKA0
> through DKA6 on a bus.
>
> I have read the CLI reference manual on the HSZ70 and can't see any
> mention of there being a conflict between the unit number and the SCSI
> addressing. It does say that a controller can present up to 8 units on
> each target ID number. Both controllers show a SCSI target(s) of (0).
>
> I only want to add two more units which would be DKC6 and DKC7 although
> what the actual disk unit is is not important.
>
> Jeff Coffield

Jeff,

As you have your HSZ70 configured, you can "add unit" D0 through D7.
You can add additional target addresses to your controllers that will
allow more units (and do some load balancing if you have redundant
controllers).

set this_controller id=(0,1,2,3)  ! up to 8 target id's, but must be
unique on the host scsi bus, hosts are usually 6 and 7

This command will allow the controllers to present unit numbers 0-7,
100-107,200-207, and 300-307.

Bill