Owners Manual
Table Of Contents
- Dell EMC PowerVault ME4 Series Storage System Owner’s Manual
- Contents
- Storage system hardware
- Troubleshooting and problem solving
- Module removal and replacement
- ESD precautions
- Dealing with hardware faults
- Firmware updates
- Continuous operation during replacement
- Shutting down attached hosts
- Shutting down a controller module
- Verifying component failure
- Customer-replaceable units (CRUs)
- Attach or remove the front bezel of a 2U enclosure
- Replacing a drive carrier module in a 2U enclosure
- Replacing a DDIC in a 5U enclosure
- Replacing a controller module or IOM in a 2U or 5U enclosure
- Replacing a power supply unit (PSU) in a 5U enclosure
- Replacing a fan cooling module (FCM) in a 5U enclosure
- Replacing a power cooling module (PCM) in a 2U enclosure
- Completing the component installation process
- Verifying component operation
- Performing updates in PowerVault Manager after replacing an FC or SAS HBA
- Events and event messages
- Connecting to the CLI port using a serial cable
- Technical specifications
- Standards and regulations
Table 27. Event descriptions and recommended actions (continued)
Number Severity Description/Recommended actions
225 Error A copy-on-write failure occurred when copying data from a master volume to a snapshot. Due to
a problem accessing the snap pool, the write operation could not be completed to the disk. Data
is left in cache.
Recommended actions:
● Delete all snapshots for the master volume and then convert the master volume to a
standard volume.
226 Error A roll back was not started because the snap pool could not be initialized. The roll back is in a
suspended state.
Recommended actions:
● Make sure the snap pool and the pool on which this volume exists are online. Restart the
roll-back operation.
227 Error A roll back failed. Failed to execute roll back for a particular LBA (logical block address) range of
the indicated parent volume.
Recommended actions:
● Restart the roll-back operation.
228 Error A roll back failed to end because the snap pool could not be initialized. The roll back is in a
suspended state.
Recommended actions:
● Make sure the snap pool and the pool on which this volume exists are online. Restart the
roll-back operation.
229 Warning The Warning threshold was reached for a snap pool.
Recommended actions:
● You can expand the snap pool or delete snapshots.
230 Warning The Error threshold was reached for a snap pool. When the error threshold is reached, the
system automatically takes the action set in the policy for this threshold level. The default policy
for the error threshold is to auto-expand the snap pool.
Resulting actions:
● All snapshots were deleted.
● Write operations are halted to all associated master volumes and snapshots.
● The oldest snapshot was deleted.
● Notification only; no action was taken.
● All snapshots were invalidated.
● Snap-pool expansion was requested
Recommended actions:
● You can expand the snap pool or delete snapshots.
231 Warning The Critical threshold was reached for a snap pool. When the critical threshold is reached, the
system automatically takes the action set in the policy for this threshold level. The default policy
for the critical threshold is to delete all snapshots in the snap pool.
Resulting actions:
● All snapshots were deleted.
● Write operations are halted to all associated master volumes and snapshots.
● The oldest snapshot was deleted.
● Notification only; no action was taken.
● All snapshots were invalidated.
● Snap-pool expansion was requested
Recommended actions:
● If the policy is to halt writes, then you must free up space in the snap pool by deleting
snapshots.
96 Events and event messages