Configuring The Priority Of Rdr Virtual Disk Resynchronization; Using Volume Mirroring For Fault Tolerance - NEC Express5800/320Ma Administrator's Manual

Using Volume Mirroring for Fault Tolerance

Configuring the Priority of RDR Virtual Disk Resynchronization

The resynchronization priority establishes the portion, expressed in megabytes per
second (Mbps) in the details pane, of I/O bandwidth that is used for the RDR disk
resynchronization operation.
To prioritize resynchronization for all RDR disks in the system
1. In ftSMC, expand ftServer Drivers, right-click SCSI Port Duplex
Driver - Sradisk_Driver, and select Properties.
2. In the dialog box, click the third Properties tab from the left.
3. Set GlobalResyncPriority to Low, Normal, or High and click OK.
To prioritize resynchronization for individual RDR disks
1. In ftSMC, expand the appropriate I/O Enclosure node and click Logical Disk
Information.
2. Right-click the target RDR virtual disk.
3. Select Set Resync Priority.
4. Select Low, Medium, or Normal and click OK.

Using Volume Mirroring for Fault Tolerance

When using Windows Disk Management to implement data fault tolerance, format
volumes as NTFS volumes.
•
Configure disks as dynamic disks. Dynamic disks organize data within volumes on
a disk and support fault-tolerant operation and disk migration between systems.
•
Mirror each volume (the boot volume on the system disk and all data volumes) on
two or more physical disks. See
System" on page 4-24
•
Assign system disks and data disks to the same disk group.
!
System disk usage topics include mirroring disks,
information about
A mirror is an identical copy of data that you can access if your primary data becomes
unavailable. NEC Solutions (America), Inc. requires that you mirror the boot volume on
the system disk. The resulting mirrored pair of disks work together to provide a
4-20 Express5800/320Ma: System Administrator's Guide
for details.
C A U T I O N
Failure to set up your disk storage as required results in
storage that is not fault tolerant.
inserting more than one disk at
"Mirroring Disks in Your Express5800/320Ma
mirror
time.
resynchronization, and