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Chapter 3. Planning 85
ServeRAID-4Lx features one Ultra160 SCSI channel, 32 MB of ECC cache
memory, and an Intel i80303 processor. Up to 14 Ultra160 and Ultra2 SCSI
devices are supported.
Each ServeRAID adapter supports up to 14 drives (and 160 MB per second
throughput) per channel (for an aggregate of up to 56 drives and 640 MBps
for the 4-channel ServeRAID-4H adapter, for example). Multiple adapters can
be installed as needs and available slots dictate.
The EXP300 storage expansion unit has a maximum 1 TB of disk storage (14
73.4 GB drives) in a 3U package, allowing up to 14 expansion units to be
used in a standard 42U rack (meaning that a full rack of EXP300 units can
hold an amazing 14 TB). The EXP300 provides Predictive Failure Analysis
(PFA) on key components, including hot-swap fans, hard drives and
redundant power supplies. The EXP300 is optimized for Ultra160 SCSI, with a
sustained data transfer rate of 160 MBps.
For more information on IBM SCSI RAID storage solutions go to:
http://ibm.com/pc/ww/eserver/xseries/scsi_raid.html
IBM Fibre Array Storage Technology
The IBM Fibre Array Storage Technology (FAStT) family of Fibre Channel storage
solutions is designed for high-availability, high-capacity requirements. FAStT
solutions can support transfers over distances up to 10 km (6.2 miles) at rates of
up to 200 MBps.
The FAStT Storage Server is a RAID controller device that contains Fibre
Channel (FC) interfaces to connect the host systems and the disk drive
enclosures. The Storage Server provides high system availability through the use
of hot-swappable and redundant components. We briefly discuss the following
three products:
The IBM TotalStorage FAStT200 Storage Server
The IBM TotalStorage FAStT500 Storage Server
The IBM TotalStorage FAStT700 Storage Server
The IBM TotalStorage FAStT200 Storage Server
The FAStT200 Storage Server is a 3U rack-mountable Fibre Channel RAID
controller and disk drive enclosure. It targets the entry and midrange segment of
the FC storage market. A typical use of the FAStT200 would be in a two-node
cluster environment with up to 30 Fibre Channel disk drives attached to the
Storage Server.
Two models are available:
The FAStT200 Storage Server, with a single RAID controller.