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84 IBM ^ xSeries 440 Planning and Installation Guide
15,000 RPM and the converged tray design are supported. To configure RAID-1,
a ServeRAID adapter is required. The ServeRAID-4Mx and ServeRAID-4Lx can
be used for connection to the hot-swap backplane of the internal drive bays.
Note: The x440 has two cables pre-installed for use with the internal drive bays,
but one is not connected. The shorter cable is initially connected from the
onboard SCSI to the drive backplane. When you install a ServeRAID adapter for
use with the internal drive bays, you will need to disconnect this cable and
connect
both ends of the longer cable. See “Cabling a ServeRAID adapter” in
Chapter 2 of the
IBM
^
xSeries 440 Installation Guide
for details.
Typically the x440 will be attached to an external disk enclosure for data storage
requirements. Some of the supported IBM storage options include:
SCSI RAID adapters and storage enclosures
Fibre Channel adapters and Storage Area Networks (SANs)
Network Attached Storage (NAS)
SCSI over IP (iSCSI)
IBM Enterprise Storage Server (ESS)
ESCON connectivity to a zSeries server
3.3.1 xSeries storage solutions
This section discusses some of the available xSeries storage solutions and
related technologies, as well as tape backup and performance considerations.
ServeRAID with external storage enclosures
The current ServeRAID-4 family of adapters includes the ServeRAID 4H, 4Mx
and 4Lx. These 64-bit, Active PCI controllers include advanced features such as
Logical Drive Migration, nine RAID levels including RAID 1E, 1E0 and 5E, as well
as adapter and cluster failover.
ServeRAID-4H features four Ultra160 SCSI channels, 128 MB of removable
battery-backed ECC cache memory, and an IBM PowerPC 750 processor
onboard. Up to 56 Ultra160 and Ultra2 SCSI devices are supported. (Using
73.4 GB hard disk drives produces 4.11 TB capacity per adapter.)
ServeRAID-4Mx features two Ultra160 SCSI channels, 64 MB of
battery-backed ECC cache memory, and an Intel i80303 processor. Up to 28
Ultra160 and Ultra2 SCSI devices are supported.
Important: The ServeRAID-4H is supported in the x440 when used for
external storage enclosure connectivity only, because the adapter is too high
for the 4U chassis when the internal SCSI connector is in use.