HP Integrity rx2800 Installation Guide - Page 14

RAID support, PCIe MPS 0ptimization, Processor subsystem

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Table 1-1 PCI slot descriptions (continued) Column Head 5 - low profile 6 - low profile 3-slot PCIe riser PCIe2 x8 (4, 2, 1) PCIe2 x8 (4, 2, 1) 2-slot PCIe riser PCIe2 x16 (8, 4, 2, 1) - RAID support The following levels of RAID support are offered: Zero memory • RAID 0, 1, 10 • Maximum 8 drives, 2 logical volumes • No cache or battery needed. Performance improved with cache Full feature • RAID 0, 10, 5 • Cache needed and installing it automatically enables the full feature firmware stack. BBWC optional. Advanced pack • RAID 6, 50, 60 • Cache needed. Advanced Pack license must be entered to enable. BBWC is required. PCIe MPS 0ptimization For PCIe-based systems, each PCIe device has a configurable MPS (maximum payload size) parameter. Larger MPS values can enable the optimization to gain higher performance. MPS Optimization is supported on PCIe systems running HP-UX and Open VMS. System firmware performs an optimization during boot time to set the MPS value to the largest size supported by both a PCIe root port and the devices below it. The default server state is optimization disabled. When disabled, system firmware sets MPS to the minimum value on each PCIe device. The info io command displays the current PCIe MPS optimization setting. To enable PCIe MPS optimization use the ioconfig mps_optimize command. Processor subsystem The server processor subsystem supports one or two dual or quad-core Itanium processors. When two processors are installed the speeds must be identical. 14 Overview

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Table 1-1 PCI slot descriptions
(continued)
2–slot PCIe riser
3–slot PCIe riser
Column Head
PCIe2 x16 (8, 4, 2, 1)
PCIe2 x8 (4, 2, 1)
5 — low profile
—
PCIe2 x8 (4, 2, 1)
6 — low profile
RAID support
The following levels of RAID support are offered:
Zero memory
•
RAID 0, 1, 10
•
Maximum 8 drives, 2 logical volumes
•
No cache or battery needed. Performance improved with cache
Full feature
•
RAID 0, 10, 5
•
Cache needed and installing it automatically enables the full feature firmware stack. BBWC
optional.
Advanced pack
•
RAID 6, 50, 60
•
Cache needed. Advanced Pack license must be entered to enable. BBWC is required.
PCIe MPS 0ptimization
For PCIe-based systems, each PCIe device has a configurable MPS (maximum payload size)
parameter. Larger MPS values can enable the optimization to gain higher performance. MPS
Optimization is supported on PCIe systems running HP-UX and Open VMS. System firmware
performs an optimization during boot time to set the MPS value to the largest size supported by
both a PCIe root port and the devices below it.
The default server state is optimization disabled. When disabled, system firmware sets MPS to
the minimum value on each PCIe device.
The
info io
command displays the current PCIe MPS optimization setting.
To enable PCIe MPS optimization use the
ioconfig mps_optimize
command.
Processor subsystem
The server processor subsystem supports one or two dual or quad-core Itanium processors.
When two processors are installed the speeds must be identical.
14
Overview