Setting Or Clearing The Mtbf For Disks; Setting The Mtbf Faultcount Limit For Disks - NEC Express5800/320Ma Administrator's Manual

1. Verify the RDR virtual disk
of the RDR virtual disk are healthy.
2. In ftSMC, expand I/O Enclosure, Storage Enclosure, and then select Slot 1, 2, or
3 to access Disk 0, 1, or 2.
3. Right click on the target disk and select Break Physical Disk from RDR Virtual
Disk.
This command splits the plex from the RDR virtual disk, creates an exact copy of
its volumes, and adds them to Disk Management.
4. Use backup software to make a copy of these volumes created in Disk
Management; then remove the volumes from Disk Management.
5. To add the removed plex back to the RDR virtual disk, in ftSMC, right-click the disk
you broke in step 2, and select Add Physical Disk to RDR Virtual Disk.
The plex is now synchronized with its active partner and is again a partner in an
RDR virtual disk.

Setting or Clearing the MTBF for Disks

Clearing the MTBF resets the MTBF to infinity, the number of faults to 0, and the time
of last fault to never.
Setting the MTBF Threshold sets the MTBF threshold and views the current count
(seconds), number of faults, and date and time of last fault. NEC Solutions (America),
Inc. presets the MTBF threshold; you should not change it unless instructed to do so
by your support representative.
See "MTBF Statistics" on page 5-1
To set or clear the MTBF for disks
1. In ftSMC, right-click the target disk.
2. Select either Set MTBF Threshold or Clear MTBF.
•
If you select Set MTBF Threshold, specify the desired threshold value in the
Threshold field of the dialog box that appears, and then click Finish.
A message appears, indicating a successful operation.
•
If you select Clear MTBF, the MTBF is cleared and a message appears,
indicating a successful operation.

Setting the MTBF Faultcount Limit for Disks

The MTBF faultcount limit defines the number of times certain errors can occur before
the system sends threshold events that generate alarms.
that you are going to backup to ensure that both plexes
for an explanation of MTBF.
Using RDR for Fault Tolerance
Disk Storage Management 4-15