Disk Storage Management; Data Fault Tolerance - NEC Express5800/320Ma Administrator's Manual

The following disk-management topics apply to your Express5800/320Ma system:
•
"Data Fault Tolerance" on page 4-1
•
"Guidelines for System Disks" on page 4-2
•
"Using RDR for Fault Tolerance" on page 4-2
•
"Using Volume Mirroring for Fault Tolerance" on page 4-20
•
"Mirroring Disks in Your Express5800/320Ma System" on page 4-24
•
"Finding a Physical Disk" on page 4-25

Data Fault Tolerance

Your Express5800/320Ma system offers two methods of ensuring data fault tolerance
and continuous availability of its disk media:
•
Rapid Disk Resync (RDR), a disk-replicating technology, is supported only on the
internal disk drives.
To create striped volumes across the mirrored internal disks, refer to the
documentation for your disk-management tool.
You choose to implement RDR, for internal disk drives, or volume-mirroring, for all
disks, during the software installation and configuration procedure. However, you can
upgrade your disks to RDR after software installation.

Disk Storage Management

Disk Storage Management
Chapter 4
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4-1