Technical data

4–16 Troubleshooting
Host’s log file or
maintenance terminal
indicates that a forced
error occurred when
the controller was
reconstructing a
RAIDset or mirrorset.
Unrecoverable read
errors may have
occurred when
controller was
reconstructing the
storageset. Errors
occur if another
member fails while the
controller is
reconstructing the
storageset.
Conduct a read scan of
the storageset using the
appropriate utility from
the host’s operating
system, such as the
“dd” utility for a DIGITAL
UNIX host.
Rebuild the storageset,
then restore its data from
a backup source. While
the controller is
reconstructing the
storageset, monitor the
host error log activity or
spontaneous event
reports on the
maintenance terminal for
any unrecoverable errors.
If unrecoverable errors
persist, note the device
on which they occurred,
and replace the device
before proceeding.
Host requested data
from a normalizing
storageset that didn’t
contain the data.
Use the SHOW
storageset-name to see
if all of its members are
“normal.”
Wait for normalizing
members to become
normal, then resume
I/O to them.
Table 4–1 Troubleshooting Table (Continued)
Symptom Possible Cause Investigation Remedy