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To verify a unit through 3DM
1 In 3DM, choose
Management > Maintenance.
2In the
Unit Maintenance section of the Maintenance page, select the unit
you want to verify and click
Verify Unit.
3DM puts the selected unit in verifying mode. If verify scheduling is not
enabled on the Scheduling page, the verification process begins almost
immediately. If verify scheduling is enabled, the unit will not start
actively verifying until the next scheduled time.
A
Stop Verify link appears next to the unit on the Maintenance page. If
you need to stop the verify process, use this link. (If initialization starts
because the unit had not previously been initialized, it cannot be halted, so
no
Stop Verify link appears.)
Rebuilding Units
Rebuilding is the process of generating data on a new drive after it is put into
service to replace a failed drive in a fault tolerant unit.
If a hot spare is specified and a redundant unit degrades, it will be used to
automatically replace the failed drive in the redundant unit without
intervention on your part. The rebuild process will automatically be launched
as a background process at the next scheduled time. If scheduling is turned
off, the rebuild process will start almost immediately (within a couple of
minutes). If 3DM is running and E-mail notification is enabled, an event
notification will be sent to specified users when the unit degrades and again
when the rebuild process is complete.
If the Auto Rebuild policy is enabled (see “Setting the Auto Rebuild Policy”
on page 31), the firmware will attempt to rebuild a degraded unit with an
available drive or a failed drive.
If desired, you can manually replace the drive, rescan the controller, and start
the rebuild process. Rebuilds on multiple units can take place simultaneously.
If multiple drives are faulted in a RAID 10 configuration, the drives are
rebuilt simultaneously. In a 4-drive RAID 10 configuration, up to two drives
can be rebuilt.
When a RAID 5 is running in Degraded mode and you rebuild it, the missing
data is reconstructed from all functioning drives.
Note: If both drives in a RAID 10 mirrored set are faulted, the data is not
recoverable. Up to half of the drives in a RAID 10 unit can become defective and
still have the user data retained, as long as the failed drives are only half of each
mirrored pair.