D Class, changing SCSI ID on Controller.

[John Waller]

Can anybody help. I have been tasked with creating a ServiceGuard Cluster between 2 D380 servers. Of course to perform this task I need to change the SCSI ID for the controller on one of the servers from 7 to either 6 or 8 so I can see the shared disks in a desk side storage enclusure. Does any body know if this is done via jumpers on the cards themselves as I cannot see a SCSI menu within the ISL or SERVice Menu. An "ioscan" of the D380 shows the SCSI card to be:
GSC add-on Fast/Wide SCSI Interface.
Many thanks

[Eugeny Brychkov · Accepted solution]

John,
change to 6, not to 8 (8 has lowest SCSI priority!).
Card should be A4107A. SCSI address dip switches are located on the board itself, so you will need to open the server. As I understand from the diagram, if dip switch is ON then bit is 0 and if off then bit is 1. Thus for 7=(on,off,off,off) and 6=(on,off,off,on)
Eugeny

[Michael Steele_2]

Yep, dip switches. There are four. 1 = on while 0 = off. Here's the truth table. 2**3 = 2 to the 3 which = 8, 2**2 = 4, etc.

2**3 2**2 2**1 2**0

15 - 1 1 1 1 (* 8+4+2+1=15 *)
14 - 1 1 1 0
13 - 1 1 0 1
12 - 1 1 0 0
11 - 1 0 1 1
10 - 1 0 1 0
09 - 1 0 0 1
08 - 1 0 0 0
07 - 0 1 1 1
06 - 0 1 1 0 (* 0+4+2+0=6 *)
05 - 0 1 0 1
04 - 0 1 0 0
03 - 0 0 1 1
02 - 0 0 1 0
01 - 0 0 0 1

You need 06 or 0 1 1 0.

Priortes start at 7 go down to 1 then restart at 15 and go down to 8. 8 has the lowest priorty.

Make sure all target addresses are unique or problems will develope.

[Eugeny Brychkov]

Repeating:
15=all off, thus switch meanings are iverse;
you forgot 0... priorities are 7..0, 15..8
Eugeny

[John Waller]

Thanks to you both for your answers. I am familiar with setting the SCSI ID using jumpers or DIP switches, I just didn't want to take the card out of the server if it was done another way.

[Michael Steele_2]

Here's a good document on the subject:

http://docs.hp.com/hpux/pdf/B3936-90024.pdf

Eugene may be right about the dip switches being inversed. I'll post a reference on dip switches if I find it.

[John Waller]

Don't worry to much about further info on switches being inversed, I can check with the card. I know the card has a ID of 7 so this should be 0111, if not I can work out the permutation which makes it equal 7.

[Jitao Yin_2]

Did you try this:

1. power up computer
2. get into the isl mode
3. Go into the services manu
4. enter the scsi command
scsi init /0/0/2/0 6

[Eugeny Brychkov]

SCSI command does not work for old good D-, K-, H-, E- etc servers, they're available only on newer models like N-, L-, RP-, RX- etc
Eugeny