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Chapter 4: Installing the DLT2500XT Stacker
Using the Power-On Self Test
The power-on self test (POST) starts automatically on power-on. Observe the display in
the stacker’s control panel:
1. The message LDR RST (loader reset) displays.
2. The message LDR ACT (loader active) displays.
3. A series of numbers displays as the stacker elevator goes up and down.
4. The message LDR RDY (loader ready) displays.
If all four events listed above take place, the stacker is ready for operation.
If all four events do not take place, the power-on self test failed and the LDR RST message
remains displayed. Follow these steps:
1. Verify that you terminated the SCSI bus.
2. Power-cycle the stacker (turn its power off, and then on again).
If the POST fails again, contact your Silicon Graphics service representative.
Setting the Stacker’s SCSI ID
Each DLT2500XT stacker must be properly configured, or SCSI bus errors and possible
data loss can result when you bring the unit on line. Each DLT2500XT stacker is assigned
a default SCSI ID setting of 5 at the factory. You can leave it configured as it was shipped
(providing no other device on the bus uses SCSI ID 5). SCSI IDs 1 through 7 can be used.
Caution: Improper SCSI ID implementation can cause degraded system performance, a
system crash, and possible data loss.
As a general rule, hard disk drives are usually numbered up from 1, and removable
media devices numbered down from 7.
Caution: Never set the drive to SCSI ID zero; that ID is reserved specifically for the host
SCSI controller.
To obtain the best performance from your DLT2500XT stacker, connect the unit as the
only device on the SCSI bus.