NEC Express5800/320Ma Betriebsanweisung PDF herunterladen (Seite 68)

Using RDR for Fault Tolerance

4-18 Express5800/320Ma: System Administrator’s Guide

2. Select Resynchronize This Physical Disk From RDR Virtual Disk.

A message appears, indicating a successful start of the command. See step 7 in

“Read-load Balancing” on page 4-7 for a description of how to verify completion of

the resynchronization process.

See “Disk Failures during Resynchronization” on page 4-5 for instructions on what to

do if the source RDR virtual disk fails during resynchronization.

Resynchronizing a Backup Boot RDR Disk

1. Verify that the original partner disk of the backup boot disk is inserted into its

original slot in the storage enclosure.

2. Reinsert the backup boot disk into its original slot in the storage enclosure.

The backup boot disk automatically resynchronizes with the original partner. The

command takes some time to run. See step 7 in “Read-load Balancing” on

page 4-7 for a description of how to verify completion of the resynchronization

process.

Recovering and Replacing RDR Disks

In your disk-management tool, if the status of an RDR disk appears as Offline,

Missing, or Online (Errors), you can try to recover the disk manually. Verify that the

disk is securely seated in the enclosure and that it has power. Perform the following

procedures to recover the disk.

To recover an RDR disk

1. Delete the RDR configuration on the disk, and then physically remove it from the

enclosure.

NOTE

Disregard any “Unsafe Removal of Device” messages that

appear when you remove an internal physical disk from

the enclosure.

2. Replace the defective disk and add the disk to an RDR virtual disk.

In the unlikely event of a system failure resulting from disk failures, restore the system

by performing one of the following procedures, as appropriate:

• Restore the system by using a backup system disk. See the discussion of creating

spare bootable hard disks in the Express5800/320Ma: Software Installation and

Configuration Guide for information.

• Reload the Express5800/320Ma System software, as described in the

Express5800/320Ma: Software Installation and Configuration Guide.

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NEC Express5800/320Ma Betriebsanweisung Seite 68