Multi-initiated SCSI Configuration.

Multi-initiated SCSI (MIS) allows the connection of regular SCSI devices to two host adapters. The two host adapters may be on the same system, or in most cases, different systems. Unfortunately, prctical implementation is not quite as simple as just adding devices. Each SCSI host adapter requires a target address, which is normally set to id=7 for each adaptor. Hence if we just add devices ie host=7 -- disks -- host=7, then we get a conflict of targets on the SCSI bus. There are two methods to change scsi inititiator id's;

Globally

This method changes the initiator id for all SCSI adapters on the system.

 ok setenv scsi-initiator-id 6

Setting individual id's

This method involves using NVRAMRC and sets scsi initiator to 6. First of all identify the required path for the device.(ie show-devs)


ok nvedit
0: probe-all
1: cd /sbus@70,0/SUNW,fas@1,8800000
2: 6 encode-int " scsi-initiator-id" property
3: device-end [control-c]
ok nvstore
ok setenv use-nvramrc? true
ok boot -r