This section describes disk controllers. For
a list of parts for the DS4700 or DS3950, see the appropriate documentation for these controllers.
- TS7650 Appliance customers who purchased systems before August 2010 should have the DS4700 disk controller,
machine-type model 1814 70H.
- TS7650 Appliance customers who purchased systems in August 2010 or later should have
the DS3950 disk
controller.
- Appliance Express® should
have the DS4700 disk
controller, machine-type model 1814 70H.
- Appliance Express should
have the DS3950 disk
controller, machine-type model 1814-94H.
- Appliance Express should
have the EXP810 disk controller, 1812-81H.
Important: For TS7650 and TS7650G installations,
this section applies only if the customer back-end storage controller
is an IBM® System Storage® DS4700 Express or DS3950. If the customer
back-end storage controller differs, use the troubleshooting procedures
that were provided by the manufacturer with the controller in the
original configuration. All attached storage to the TS7650G is supported
separately, and problems are not called home for it.
The disk controller supports sixteen 450 GB, 4 Gbps, 15 krpm,
Fibre Channel disk drive modules (DDMs).
The disk controller comes with two RAID controllers, two power
supplies, and two cooling units. It provides dual, redundant controllers,
redundant cooling, redundant power, and battery backup of the RAID
controller cache. The disk controller is designed to provide maximum
host and drive-side redundancy, enabling full redundant drive loop
support to additional disk storage capacity in the expansion frames
via the drive loop port from each RAID controller. In addition, each
RAID controller supports direct attachment of two servers that contain
two Fibre Channel host bus adapters each. External cables and small
form-factor pluggable (SFP) modules connect the disk controller to
the expansion units and the servers. For optimum performance,
RAID 5 configuration is recommended.
Note: Currently, the only expansion unit that can be attached to the
IBM-provided disk controller is the 1812 81H disk expansion unit, Feature Code 3707: 4.8 TB Fibre
Channel Disk Expansion Unit.
For more support information about the disk controller, go to the IBM Support Portal and select .