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Hot-swappable and redundant components provide high availability for the
FAStT200 Storage Server. A fan or a power supply failure will not cause
downtime and such faults can be fixed while the system remains operational. The
same is true for a disk drive failure if fault-tolerant RAID levels are used. With two
RAID controller units and proper cabling, a RAID controller or path failure will not
cause loss of access to data.
Each RAID controller has one host and one drive FC connection. The FAStT200
HA model can use the two host and drive connections to provide redundant
connection to the host adapters and to EXP500 enclosures. Each RAID
controller unit also contains 128 MB of battery-backup cache.
Tip: The FAStT200 ships with IBM FAStT Storage Manager 7.10. When we
wrote this redbook, there was no Storage Manager version for IA-64
architecture. When available, you can download the latest version for IA-64
from
http://www.pc.ibm.com/support
The IBM TotalStorage FAStT500 Storage Server
The FAStT500 Storage Server is a 4U rack-mountable Fibre Channel RAID
controller device. It provides the levels of performance, availability, and
expandability needed to satisfy high-end storage requirements. You would
typically use the FAStT500 Storage Server in advanced cluster environments
and possibly with heterogeneous operating systems running on the host
systems. Another application would be where multiple servers are being
consolidated onto one or more x450 systems and there is a requirement to
centralize storage for these systems.
The FAStT500 Storage Server features two RAID controller units, redundant
power supplies, and fans. All these components are hot-swappable, which
ensures excellent system availability. You use the EXP500 external storage
expansion enclosures to install the FC disk drives and you can connect up to 22
EXP500 enclosures to the FAStT500. This means a total of up to 220 disk drives.
The enclosures can be connected in a fully redundant manner, which provides a
very high level of availability. On the host-side FC connections, you can use up to
four mini-hubs.
This allows you to establish up to eight host connections without needing an
external hub or a switch. For performance and availability, each RAID controller
unit contains 256 MB of battery-backed cache and this amount can be further
expanded.
The IBM TotalStorage FAStT700 Storage Server
The FAStT700 Storage Server is the newest addition to the FAStT range of
products. As with the FAStT 500 Storage Server, you would typically implement
.
Chapter 3. Planning
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