Disk Operations; Disk Operations Using The Rdr (Rapid Disk Resync) Function - NEC Express5800/R320a-E4 User Manual

DISK OPERATIONS

This section explains the disk operation by the RDR (Rapid Disk Resync) function.
NEC Express5800/ft 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.
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]
Slot 1 Slot 3
Slot 0 Slot 2
Slot 0 Slot 2
Slot 1 Slot 3
Slots corresponding to the mirroring process
Windows Setup and Operation 3-3
Slot 5 Slot 7
Slot 4 Slot 6
Slot 4 Slot 6
Slot 5 Slot 7