User guide

84 Managing the Storage Solution
Figure 66. Verify Options Screen
The following table provides a description of each option.
Option Description
Check Parity This option reads all the data and parity, calculates the XOR of
the data, and compares it to the parity. If there is an error, it is
displayed in the event log.
Rewrite Parity This option reads all the data, calculates the XOR of the data, and
writes this out as the new parity. This is the fastest to complete,
since it does not have the overhead of a comparison.
Check and Rewrite Parity This option reads all the data and parity, calculates the XOR of the
data, and compares it to the parity. Then, if there is a discrepancy,
it writes this out as the new parity and creates a log entry. This is
the slowest to complete, since it has the overhead of a comparison
as well as a rewrite.
During the verification, the drive members icons in the front enclosure view of that array will display
an animated icon indicating a verification is in progress. Also, adjacent to the array name in the Main
screen, a progress bar will indicate the percent complete. When you place the mouse pointer over
the progress bar a pop-up will display the value of the percent complete.