Specifications

94 IBM Power 770 and 780 Technical Overview and Introduction
The following SAS X cables are available for usage with a PCIe2 1.8 GB Cache RAID SAS
adapter (#5913):
򐂰 3 meters (#3454)
򐂰 6 meters (#3455)
򐂰 10 meters (#3456)
In all of these configurations, all 12 SAS bays are controlled by a single controller or a single
pair of controllers.
A second EXP 12S Expansion Drawer can be attached to another drawer by using two SAS
EE cables, providing 24 SAS bays instead of 12 bays for the same SAS controller port. This
configuration is called cascading. In this configuration, all 24 SAS bays are controlled by a
single controller or a single pair of controllers.
There is a maximum of up to 110 EXP 12S Expansion Drawer on SAS PCI controllers.
The #5886 can be directly attached to the SAS port on the rear of the Power 770 and 780,
providing a very low-cost disk storage solution.
Adding the optional 175 MB Cache RAID - Dual IOA Enablement Card (#5662) to the
Power 770 and Power 780 causes the pair of embedded controllers in that processor
enclosure to be configured as dual controllers, accessing all six SAS bays. Using the internal
SAS Cable Assembly for SAS Port (#1819) connected to the rear port, the pair of embedded
controllers is now running 18 SAS bays (six SFF bays in the system unit and twelve 3.5-inch
bays in the drawer). The disk drawer is attached to the SAS port with a SAS YI cable. In this
18-bay configuration, all drives must be HDD.
A second unit cannot be cascaded to a EXP 12S Expansion Drawer attached in this way.
Various disk options are available to be installed in the EXP 12S Expansion Drawer.
Table 2-35 shows the available disk drive feature codes.
Table 2-35 Disk options for the EXP 12S drawer
For detailed information about the SAS cabling, see the Serial-attached SCSI cable
planning documentation:
http://publib.boulder.ibm.com/infocenter/powersys/v3r1m5/index.jsp?topic=/p7had/p7
hadsascabling.htm
Feature code Description OS support
#3586 69 GB 3.5" SAS Solid State Drive AIX, Linux
#3646 73.4 GB 15K RPM SAS Disk Drive AIX. Linux
#3647 146.8 GB 15K RPM SAS Disk Drive AIX, Linux
#3648 300 GB 15 K RPM SAS Disk Drive AIX, Linux
#3649 450 GB 15 K RPM SAS Disk Drive AIX, Linux
#3587 69 GB 3.5” SAS Solid State Drive IBM i
#3676 69.7 GB 15 K RPM SAS Disk Drive IBM i
#3677 139.5 GB 15 K RPM SAS Disk Drive IBM i
#3678 283.7 GB 15 K RPM SAS Disk Drive IBM i
#3658 428.4 GB 15 K RPM SAS Disk Drive IBM i