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26
The Bus A LED will be ON
Environmental Services (ES) LED is ON for the TSM in this example to
show that its ES block is the active block.
Note: Both I/O modules are at ID 15. Only one module will be
active at any one time and the other will be on standby. If the
active ES block fails the standby will take over.
For information on the I/O module LED, see page 20.
Cabling the dual (split) SCSI bus configuration
Two host cables are required for this configuration. The length of each
cable may be a maximum of 25 meters. When viewed from the rear
there should be a CSM installed in one I/O slot and a TSM in the other.
The SCSI bus needs to be set in the 'forced split' mode to do this
configuration. A jumper must be installed at jumper location JP10 on
the CSM PCB. To do this,
1.
Remove the CSM from the enclosure and remove the top cover.
2.
Locate JP10 and install a jumper.
3.
Replace the top cover.
4.
Insert the CSM in to the enclosure.
Follow the procedures below to connect the cables (see figure page
27):
1.
Power off the enclosure and the host system.
2.
Attach one end of the first cable to one connector on the CSM.
3.
Attach the other end of this cable to a host.
4.
Attach one end of the second cable to the other connector on the
CSM.
5.
Attach the other end of this cable to a host.
3
Enclosure must be powered on to see the LEDs.
3
to indicate that all disks are on Bus A. The
3 Cabling and configuration
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