QuickSpecs

T
ECHNOLOGY
B
RIEF
(cont.)
17
TC000604TB
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Hot-Plug Capability
When a power supply is hot swapped, the microcontroller governs the power-up and power-down
sequence, enables the health drivers to calculate redundancy “on the fly,” and informs the health
drivers of changes in load. Compaq hot-plug power supplies are readily identifiable by their port-
colored bezel, as shown in Figure 11.
Port-colored bezel
Figure 11: Front view of hot-plug power supply with port-colored bezel.
Hot-Plug Hard Disk Drives
The ProLiant 8500 server supports four 1-inch, Wide Ultra-3 SCSI, internal hot-plug hard disk
drives. The internal drives can be controlled by an Integrated Smart Array Controller (see “Storage
Technologies”) to optimize them for OS and boot support. When the server is configured for
maximum capacity, it can support 73 GB of internal storage. Capacity will increase in the future as
new drive technologies emerge.
Auto Processor Bus Recovery
Auto processor bus recovery is a feature of the ProLiant 8500 server that maintains server
availability in the unlikely event that one of the cache accelerators fails. If a cache accelerator fails,
the server will go through the Automatic Server Recovery (ASR) process and reboot. Typically, a
failed cache accelerator would prevent the server from rebooting; however, auto processor bus
recovery enables the server to recover and maintain availability of the processor bus with the good
cache accelerator. With the server still available, the administrator can replace the failed
accelerator at the most convenient time.
S
TORAGE
T
ECHNOLOGIES
As corporations commit more critical information to computers, the requirements for more storage
capacity and faster data movement are increasing at a startling rate. The Compaq ProLiant 8500
server includes new storage technologies that help meet these requirements. New hard drive
technology and a specially designed integrated array controller allow the ProLiant 8500 server to
deliver the highest levels of external storage capacity faster and with more reliability.
Hard Drive Technology
The Compaq ProLiant 8500 server uses low-voltage differential (LVD) Ultra-3 SCSI hard drives.
Ultra-3 SCSI hard drives use a 16-bit bus and a double pumped 40-MHz clock rate to achieve
maximum transfer rates of 160 MB/s. This bus speed provides the performance demanded by
today’s data-intensive applications and prevents system performance from becoming I/O limited as
drive throughputs increase.