1-24 System Overview
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 for 36Gb and 73GB storage capacity
disk drives; 15,000 RPM for 18GB storage capacity disk drives.
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 1-5.
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.
PCI Adapter Cards
For fault-tolerant systems the 32/64-bit PCI adapter cards must be installed in the PCI
modules as redundant pairs. This is so that if a PCI card fails in one PCI module its
equivalent PCI card in the other PCI module takes over the I/O operation without the
processing being interrupted or having any loss of data or performance.
Located on the rear of each PCI module are PCI adapter-slot status LEDs that monitor
the status of each PCI card. See Table 1-4 for a list and description of these PCI
adapter-slot status LEDs.