NEC Express5800/R320g-M4 Maintenance Manual page 132

Chapter 2 Configuring and Upgrading the System
(b) Stop Verify RDR Virtual Disk
Verification of RDR virtual disk in progress can be stopped.
1. Click Start – RDR – RDR Utility to start RDR Utility.
2. Right-click RDR Virtual Disk x in the left pane and click Stop Verify RDR Virtual Disk.
3. In the Stop Verify RDR Virtual Disk dialog box, click OK.
(c) Set Resync Priority
Priority of synchronization by RDR can be specified. By changing the priority, I/O load during
synchronization can be reduced. Priority can be changed during synchronization. And change will be
reflected immediately.
1. Click Start – RDR – RDR Utility to start RDR Utility.
2. Right-click RDR Virtual Disk x in the left pane and click Set Resync Priority.
3. When a dialog box appears, select Low, Normal or High (a default is Normal) and click OK.
4. In the Set Resync Priority dialog box, click OK.
Disk size
( HDD / SSD )
Per 10GB
Ex: 300GB
(d) Set RDR LUN Load Balancing
On or off of load balancing can be specified.
When the load balancing is on (default), the read process is performed alternately from two physical disks
forming the RDR Virtual Disk to improve performance. When it is off, the read process is performed from the
physical disk specified as Active RDR Plex.
1. Click Start – RDR – RDR Utility to start RDR Utility.
2. Right-click RDR Virtual Disk x in the left pane to change the priority and click Set RDR LUN Load
Balancing.
3. When a dialog box appears, select On or Off (a default is On) and click OK.
4. In the Set RDR LUN Load Balancing dialog box, click OK.
Express5800/R310g-E4, R320g-E4, R320g-M4 Maintenance Guide (Windows)
132

Note The verification process is automatically performed after 12 hours from system start
and at the beginning of every month.

The setting for automatic verification process is stored in Task Scheduler of Windows
OS in the following format.
Task name: RdrFirstVerify
Task name: RdrVerifyLun X (X: Virtual disk number)
Example: RdrVerifyLun 1 (when the virtual disk number is 1)

The task execution date and time can freely be set by using Task Scheduler.

The time required for verification depends on the disk size and load.
For 300GB disk, it takes about 80 minutes.
The approximate time required for synchronization
Low
16 minutes
480 minutes
Normal High
5.3 minutes 1.3 minutes
160 minutes 40 minutes
1. Hard Disk Drive Operations