Acer altos s300

23

The Bus A LED will be ON

1

 to indicate that all disks are on Bus A.  The 

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 in standby mode.  If 
the active I/O module 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 10 meters.  When viewed from the rear 
there should be an ESM installed in one I/O slot and a TSM in the other.  

Follow the procedures below to connect the cables (see figure on page 
24):

1.

Power off the enclosure and the host system.

2.

Attach one end of the cable to one connector on the ESM.

3.

Attach the other end of this cable to a host.

4.

Attach one end of the second cable to the second connector on 
the ESM.

5.

Attach the other end of this cable to a host.

Note:  For more information on the host connectors, refer to the 
documentation supplied with the host system. 

1

Enclosure must be powered on to see the LEDs.