Many thanks to all for helping me (so quickly).
Jeff, Alan and Bill suggest me the best way to do this.
My original question was:
which is the exact way to identify the unit in HSZ70, referred for
example
by disk rzb59 ?
I tried scu show edt, then hszterm and show unit but i don't know the
relationship between rzb59 and unit Dxxx. Can you explain me ?
I describe Alan's suggest:
The host device name is derived from three pieces of information;
the host bus to which the controller is connected, the SCSI target
ID on that controller and the logical unit of that ID. These last
two are characteristics of the unit on the HSZ70. The LUN can be
found from the letter after the "rz" in the name:
a = LUN 0
b = LUN 1
c = LUN 2
and so on
If no letter is present, it is LUN 0. The "show edt" information
in the scu(8) listing will also have the LUN. The bus number and
target ID make up the unit number, in your case 59. To work backward
from the unit number to the bus and target:
bus = unit / 8
target = remainder of unit / 8
So, using your example it is bus 7, target 3.
On the HSZ70 side, the Dxxx number is constructed from the target
ID and the LUN. In the simple cases the target ID is the hundreds
digit of the HSZ70 unit and the LUN is the ones digit; Dt0l. So,
your example; rzb59 is D301.
If you have multiple HSZ70s, you have to know which SCSI bus
which HSZ70 is on and that can often be the hardest part of
configuration management.
--
Paolo Falchero
I.T.S. Srl - Midrange Technologies
VMS/Unix System Technologies
Via Issiglio 63/A - 10141 - Torino - (Italy)
Phone: +39 11 6852840
Fax: +39 11 6853583
mailto:paolo.falchero_at_its.it
Received on Thu Apr 01 1999 - 07:21:57 NZST