User`s guide

System Troubleshooting and Diagnostics
5.3 Power-On Self-Test (POST) and ROM-Based Diagnostic (RBD) Failures
parameter P4 set to 0 to rebuild the bitmap.
To force rebuilding the bitmap to all good memory, enter the following
commands:
T300000 ; T 30 will not work by itself.
T0 ; rerun powerup script
5.4 Testing DSSI Storage Devices
A DSSI storage device (ISE) may fail either during initial power-up or during
normal operation. In both cases, the failure is indicated by the lighting of the
red Fault indicator on the drive’s front panel.
If the drive is unable to execute the Power-On Self Test (POST) successfully,
the red Fault indicator remains lit and the Run/Ready indicator does not come
on, or both indicators remain on.
POST is also used to handle two types of error conditions in the drive:
• Controller errors are caused by the hardware associated with the controller
function of the drive module. A controller error is fatal to the operation
of the drive, since the controller cannot establish a logical connection to
the host. The red Fault indicator lights. If this occurs, replace the drive
module.
• Drive errors are caused by the hardware associated with the drive control
function of the drive module. These errors are not fatal to the drive, since
the drive can establish a logical connection and report the error to the host.
Both indicators go out for about 1 second, then the red Fault indicator
lights. In this case, run either DRVTST, DRVEXR, or PARAMS (described
in drive’s service documentation) to determine the error code.
Three configuration errors also commonly occur:
• More than one node with the same bus node ID number
• Identical node names
• Identical MSCP unit numbers
The first error cannot be detected by software. Use the SHOW DSSI command
to display the second and third types of errors. This command lists each device
connected to the DSSI bus by node name and unit number.
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