NEC Express 5800/320Lc, User Manual

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Windows Setup and Operation 3-15
Disk Operations Using the RDR (Rapid Disk Resync)
Function
RDR (Rapid Disk Resync)
Models supporting the RDR function secure reliability by making disks duplexed per disk using the
ft control software’s RDR function. Duplexing disks by the RDR function enables the disks to be
resynchronized in a short period of time when their mirror has been broken due to causes such as
PCI module replacement.
Setting RDR to disks duplicates the disks of paired slots as shown in the figure below and Windows
(ex. Disk Management and Device Manager) recognizes paired disks as a single virtual disk.
[Paired slots]
Corresponding slots Virtual disk name given by the RDR
Utility
PCI module#1 Slot 1 PCI module#2 Slot 1
PCI module#1 Slot 2 PCI module#2 Slot 2
PCI module#1 Slot 3 PCI module#2 Slot 3
RDR Virtual Disk 1
RDR Virtual Disk 2
RDR Virtual Disk 3
Note: In the above table, the PCI module names correspond to the following modules:
PCI module (for Group1): PCI module#1
PCI module (for Group2): PCI module#2
[Cautions for using the RDR function]
1.
RDR can be set only to the disks inserted into the built-in slots of NEC Express5800/ft series.
2.
Be sure to specify RDR to all disks inserted to the built-in slots and make duplex settings.
3.
RDR can be set only to basic disks.
If a span volume or stripe volume is needed, make settings of RDR to a basic disk and then
change the disk to a dynamic disk from [Disk Management].
4.
The disks to set RDR must have the same capacity and must be new or physically formatted.
(For physical format, refer to “SCSI BIOS ~ Fast!UTIL ~” in Chapter 4 “System
Configuration” and perform Low-Level Format using SCSI Disk Utility.)