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Lost Data/Bad Blocks
Clicking Configure RAID > Lost Data takes you to the Lost Data/Bad Blocks page. In RAID 0 arrays, data
is lost if any of the component disks fail or develop errors. In RAID 1, RAID 4, and RAID 5 arrays, data is only
lost if two or more component disks fail or develop errors simultaneously. In RAID 6 arrays, data is only lost if
three or more component disks fail or develop errors simultaneously. See
Appendix C , RAID levels on
page 252 for more information.
Normally, the Lost Data/Bad Blocks page looks like this:
Figure 3-81: Lost Data/Bad Blocks page with no error message
When there is a lost data warning, the Lost Data/Bad Blocks page looks like this:
Figure 3-82: Lost Data/Bad Blocks page with bad data blocks message
Click the Acknowledge Lost Data Warning button to acknowledge the warning. A message is displayed,
confirming the acknowledgment. Click the Back button to return to the Lost Data/Bad Blocks page.
Notes:
After acknowledging lost data, it is STRONGLY RECOMMENDED that you run an array verification
immediately. See
Verify RAID Array on page 133 for instructions.
Lost data warnings also appear on the Home page and can be acknowledged from there (see Home page
on page 57).
Chapter 3: The Graphical User Interface — Configure RAID
Nexsan High-Density Storage
User Guide
www.nexsan.com
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