IBM EXP15 Hardware Maintenance Manual page 40

Problem Indicator
Unable to access drives on
one or both SCSI buses
Intermittent Power Loss
Random errors
Note
If you cannot find the problem using this
Symptom-to-FRU Index, test the entire system. See
the server documentation for more detailed information
on testing and diagnostic tools.
32
IBM Netfinity EXP15, EXP200, EXP500 HMM
FRU/Action
1. Check SCSI cables
and connections
2. Check the drive SCSI
ID setting.
3. ESM board
4. Ensure that option
switches 1 and 5 are
set to the appropriate
position (only change
switch position when
the expansion unit is
powered off).
1. AC power or plug
2. Power supply
3. Mid-plane
1. Mid-plane board