Daisy chain two SureStore E SC10

[Aaron Pancoast]

I would like to find some information on how to daisy chain two SC10's.

[Torsten.]

Hi Aaron,

it depends on the configuration of the SC10.
Since a fully loaded SC10 occupies 12 SCSI IDs, there is not enough room for another SC10. The only choice you have is to configure both to split bus mode, one with the setting "high addressing mode" on, one to off. Now you can connect one half of a SC10 to one half of the other to one HBA. You will need two HBAs to do this.

Have a look at the manual:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/lpg28398/lpg28398.pdf

[Aaron Pancoast]

Thank you for the response. I have a couple more questions regarding this issue.

Currently we have one SC10 which has two BCC card. This SC10 is configured for split bus. The 2nd SC10 which I plan to daisy chain also has the same type of configuration, except the 2nd SC10 has the "high address mode (switch 4)" set to "off".

On the 2nd SC10 I am assuming I should leave the "Tray ID" to "0" (same as the 1st SC10) due to the "high address mode" set to off (low SCSI
address) it will not conflict with the 1st SC10.

[Torsten.]

The tray ID is the rotary switch, right?
Don't care about this switch, it's not used here.

You are right, one system have to be set to high address on, one to off.

Manual page 79 - disk addressing - is WRONG!!!

I'll attach the correct information.
(notice the BCC addresses in high address mode)

[Aaron Pancoast]

When I'm hooking up the two SC10's, what would be the correct way to connect the cables between the two. I'm assuming that out of the HP the cables would go to SCSI A and then SCSI B, but going to the second SC10, what is the correct way to place the cables. Do you go from SCSI A to SCSI A and the B to B and terminate the second SC10. Is there a diagram for such a connection?