APC RAID Subsystem SCSI-SATA II User Manual download pdf (Page 67)

SAS / SATA II NAS System

User’s Manual

5.3.5 Check Volume Set

Use this function to perform Volume Set consistency check, which verifies the

correctness of redundant data (data blocks and parity blocks) in a Volume Set. This

basically means computing the parity from the data blocks and comparing the results

to the contents of the parity blocks, or computing the data from the parity blocks and

comparing the results to the contents of the data blocks.

NOTE: The Volume Set state must be Normal in order to perform

Check Volume Set. Only RAID levels with parity (redundant data)

such as RAID Levels 3, 5, 6, 30, 50 and 60 support this function.

To perform Check Volume Set function:

1. Click on the Check Volume Set link.

2. Tick from the list the Volume Set you want to check. Select the Check Volume

Set options.

Check Volume Set Options:

 Scrub Bad Block If Bad Block Found, Assume Parity Data is Good

 Re-compute Parity if Parity Error, Assume Data is Good

NOTE: When the 2 options are not selected, it will only check

for errors. It is recommended to perform Check Volume Set

with the 2 options unselected at first. If the result shows error,

the two options can be selected and redo Check Volume Set to

correct the errors.

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APC RAID Subsystem SCSI-SATA II User Manual Page 67