Notes On Using Rdr To Mirror Disks In Internal Storage; Disk Failures During Resynchronization - NEC Express5800/320Ma Administrator's Manual

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Reusing dynamic disks
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Recovering a disk
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Verifying disk integrity
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Prioritizing resynchronization
To use RDR to mirror dynamic disks, see the Express5800/320Ma: Software
Installation and Configuration Guide.
You can also set disk parameters from the SCSI Port Duplex Driver - Sradisk_Driver
node shortcut menu in the ftSMC.

Notes on Using RDR to Mirror Disks in Internal Storage

The procedure used to mirror disks with RDR is the same used to upgrade a disk to
RDR. If you are upgrading disks to use RDR, be sure that the disks are basic disks. If
the disks have been configured as dynamic disks,
before upgrading them to RDR.
Although you can only create RDR disks from basic disks, you can make RDR disks
dynamic if your policies require it.
If you insert a non-RDR-configured disk into a slot whose partner slot is occupied by
an RDR virtual disk, the system automatically adds the inserted disk to the RDR virtual
disk.
Not all RDR commands and procedures are valid on all physical disks. Error messages
appear if you attempt an invalid RDR command. Error messages also suggest possible
corrective actions, where applicable.
Some RDR configuration changes, especially those made on simplex RDR virtual
disks, may require the operating system to restart, in order to complete. When the
Windows restart warning appears, you can restart the system immediately or defer
restart until a more convenient time.
An RDR disk is brought online as Unconfigured if you insert it into a slot whose
companion slot contains an RDR configured disk that is not the inserted disk's partner.
An RDR disk is brought online normally if you insert it into a slot whose companion slot
either is empty or contains an unconfigured disk.

Disk Failures during Resynchronization

In RDR resynchronization, the partnered RDR virtual disks relate as source and target
disks. The source is the disk from which the target disk is being resynchronized.
If a source disk fails or is removed from service during resynchronization, the target
disk is removed from the system and treated as a deported disk. If the target disk fails
Using RDR for Fault Tolerance
convert the disks to basic disks
Disk Storage Management 4-5