NEC Express5800 320La, User Manual

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1-16 System Overview
For true dual modular redundancy, all the disk drives must be mirrored in the system, as
shown below.
Mirrored Drives
Drive Drive
1 4
2 5
3 6
All the disk drives must be added in pairs and only similar disks can mirror each other.
Figure 1-10.
G ro u p 1
G ro u p 2
Figure 1-10. Mirrored Hard Disk Drives
Table 1-9 summarizes the features of storage bays and hard disk drives.
Table 1-9. Features of the Storage Bays and Hard Disk Drives
Feature Description
Disk drives Hot pluggable and redundant.
Disk drive speeds
and storage
capacity Disk drive spindle speeds of 10,000 RPM. Storage capacities of 18, or 36 GB.
Disk drive carrier Each disk drive is mounted in a disk drive carrier containing a handle, latching
mechanism, and two status indicators. The status indicators are listed along
with a description of each in Table 1-2.
Storage bays The storage bays can contain any combination of disk drive carriers and
dummy disk drive carriers as long as equivalent drives are mirrored.
DO NOT remove dummy disk drive carriers from unused slots. They are
present to direct airflow around the devices.