4405ch02 Architecture and technical overview.fm Draft Document for Review May 28, 2009 1:59 pm
56 IBM Power 570 Technical Overview and Introduction
paging space. Specific client requirements can be satisfied with the several external disk
possibilities that the 570 supports.
2.11.1 IBM System Storage EXP 12S (FC 5886)
The IBM System Storage EXP 12S is a high density rack-mountable disk drive enclosure for
supporting a total of twelve 3.5-inch disk drives on POWER6 systems only. Using
hot-swappable 300 GB SAS disk drives the EXP 12S drawer can provide 3.6 TB of disk
capacity. The expansion drawer provides redundant power device, cooling, and SAS
expanders all devices are hot-swappable. The SAS disks are front accessible, using the same
disk carrier and 3.5 inch SAS disk drives as used in IBM POWER6 Power Systems. As a two
unit, 19-inch rack-mountable disk enclosure supports 73 GB, 146 GB, and 300 GB
hot-swappable SAS disk drives.
The IBM System Storage EXP 12S drawer offers :
Modular SAS disk expansion drawer
Up to 12 3.5-inch SAS disk drives
Variety of supported connection options, from single attachment to a HACMP solution
Redundant hot-plug power and cooling with dual line cords
Redundant and hot-swappable SAS expanders
IBM System Storage EXP 12S drawer physical description
The EXP 12S drawer must be mounted in a 19-inch rack, such as the IBM 7014-T00 or
7014-T42. The EXP 12S drawer has the following attributes:
One drawer EXP 12S
– Width: 481.76 mm (18.97 in)
– Depth: 511.00 mm (20.12 in)
– Height: 87.36 mm ( 3.38 in)
– Weight: 18 kb (39.70 lp)
Connecting a EXP 12S drawer to a POWER6 system
To connect a EXP 12S SAS drawer to a POWER6 system an additional adapter is needed.
Table 2-19 provides the current list of available adapters.
Table 2-19 SAS adapters
Depending on the required configuration a different set of cables are needed to connect the
EXP 12S drawer to the system or drawer. A list of cables are provided in Table 2-20.
Table 2-20 SAS connection cables
Feature Description
5900 PCI-X DDR dual SAS adapter
Feature Description
3652 SAS cable (EE) drawer to drawer 1 meter
3652 SAS cable (EE) drawer to drawer 3 meter
3654 SAS cable (EE) drawer to drawer 3 meter
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