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If an array build has begun, you can monitor the progress of the array build by clicking the right
mouse button on the host drive and then selecting progress information logical_progress_info. See
Figure 91.
Parity Verify
Click the right mouse button on the array drive icon.
RAID 4 and RAID 5 drives contain parity information, which is used in the event of drive failure.
The parity information is calculated from the user data on the disk array. On RAID 4 disk arrays
the parity data is stored on a single disk (parity disk), on RAID 5 disk arrays the parity data is
distributed over all drives (parity striping). This option verifies online the parity information of the
selected RAID 4 or RAID 5 array drive. If this option is selected for several array drives, the
processes are put into a queue and performed one after the other.
If a parity error is detected, find the reason for the data corruption. A good indication of data
corruption can be retries terms_retry on the SCSI bus. If the retry-counter shows high numbers,
this might be the problem. Possible reasons for parity error are bad cabling terms_cabling,
termination terms_termination or hardware error from a defective drive or an overheated drive.
After removing the reason of the data corruption you can carry out parity recalculate
logical_precalc to ensure that the parity information of this disk array becomes valid.
Storage Console Plus
Figure 91. Array Build Information Dialog
Figure 92. Parity Verify
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