IBM OpenPower 720, Технический обзор и введение

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Chapter 2. Architecture and technical overview
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Table 2-3 Available tape drives
2.7.2 Internal SCSI disks
The OpenPower 720 can have up to eight disk drives plugged in the two 4-pack disk drives
backplanes. The two 4-pack disk drives backplanes can accommodate the devices listed in
Table 2-4 on page 29.
Table 2-4 Disk drive options
At the time of writing, if a new order is placed with two 4-pack DASD backplanes (FC 6592)
and more than one disk, the system configuration shipped from manufacturing will balance
the total number of SCSI disks between the two 4-pack SCSI backplanes. This is for
manufacturing test purposes, and not because of any limitation. Having the disks balanced
between the two 4-pack DASD backplanes allows the manufacturing process to
systematically test the SCSI paths and devices related to them.
Hot-swap disks and Linux
Hot-swappable disk drive is only available with Linux 2.6 kernel. A OpenPower 720 system
not running the Linux 2.6 kernel must be shut down and powered off before you replace any
disk drives.
2.7.3 RAID options
Internal hardware RAID is available on the OpenPower 720. Three options are available:
򐂰 Install the Dual Channel SCSI RAID Enablement Card (FC 1976). Install four disk drives in
the first 4-pack DASD backplane (FC 6592). This will allow RAID 0, 5, or 10 capabilities
within a single 4-pack of DASD with one RAID controller.
򐂰
Install FC 1976. Install a second FC 6592. Install four additional disk drives in the second
4-pack DASD backplane. This will allow RAID 0, 5, or 10 capabilities across two 4-packs
of DASD with one RAID controller.
򐂰 Install feature number 1976. Install the Ultra320 SCSI 4-Pack Enclosure for Disk Mirroring
(FC 6593). Install the PCI-X Dual Channel Ultra320 SCSI RAID Adapter (FC 1975). Install
the SCSI Cable which connects the PCI Adapter to the second 4-pack DASD backplane
(FC 4267). This will allow RAID 0, 5, or 10 capabilities within each 4-pack of DASD with
two RAID controllers.
Feature code Description
1991 4-mm 36/72 GB tape (LVD)
6134 8-mm 60/150 GB tape (LVD)
1992 VXA 80/160 GB tape (LVD)
Feature code Description
1970 36.4 GB 15 K RPM Ultra3 SCSI disk drive assembly
1968 73.4 GB 10 K RPM Ultra3 SCSI disk drive assembly
1971 73.4 GB 15 K RPM Ultra3 SCSI disk drive assembly
1969 146.8 GB 10 K RPM Ultra3 SCSI disk drive assembly
1972 146.8 GB 15 K RPM Ultra3 SCSI disk drive assembly
1973 300 GB 10 K RPM Ultra3 SCSI disk drive assembly