Disk Operations; Disk Operations Using The Rdr (Rapid Disk Resync) Function - NEC NovaScale R630 User Manual

DISK OPERATIONS

This section explains the disk operation by the RDR (Rapid Disk Resync) function.
Fault Tolerant Server series duplicates disks to secure data by using "Rapid Disk Resync (RDR) function". This section
describes operations such as configuration of dual settings to disks and replacement of disks.
IMPORTANT:
On the disks containing the OS, it is recommended to create only the system partition. To create a partition other than
a system partition on the disk with the OS, note the following:
If you reinstall the OS, the entire disk will be cleared. If there is any data partition other than the system partition, the
data must be backed up before reinstalling the OS.

Disk Operations Using the RDR (Rapid Disk Resync) Function

RDR (Rapid Disk Resync)
RDR function of ft control software secures reliability by making disks duplexed per disk. 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.
[Corresponding slots]
Note: In the above table, the PCI module names correspond to the following modules:
PCI module (for CPU/IO module 0): PCI module 0
PCI module (for CPU/IO module 1): PCI module 1
[Cautions for using the RDR function]
1.
RDR can be set only to the disks inserted into the built-in slots of Fault Tolerant Server 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].
Slots corresponding the mirroring process
Corresponding slots
PCI module 0 Slot 1
PCI module 0 Slot 2
PCI module 0 Slot 3
Slot 3
Slot 2
Slot 1
Slot 3
Slot 2
Slot 1
PCI module 1 Slot 1
PCI module 1 Slot 2
PCI module 1 Slot 3
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