IBM eServer OpenPower 720, Technical Overview And Introduction

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OpenPower 720 Technical Overview and Introduction
2.5.4 SCSI adapters
To connect to external SCSI devices, the following adapters provided in Table 2-2 are
available, at the time of writing, to be used in OpenPower 720 system.
Table 2-2 Available SCSI adapters
There is also the option to make the internal Ultra320 SCSI channel externally accessible on
the rear side of the system by installing FC 4273. No additional SCSI adapter is required in
this case. If FC 4273 is installed, a second 4-pack disk enclosure (FC 6592 or FC 6593)
cannot be installed, which limits the maximum number of internal disks to four. FC 4273 also
requires one PCI-X slot.
For more information about the internal SCSI system, see 2.7, “Internal storage” on page 28.
2.6 Internal service processor communications ports
The service processor communications ports S1 and S2, at the rear of the system, are only
available if the system is not managed using a Hardware Management Console (HMC). In
this case, the S1 and S2 ports support the attachment of serial console and modem.
If an HMC is connected, a
virtual serial console
is provided by the HMC (logical device vsa0
under AIX) and also a modem can be connected to the HMC. The S1 and S2 ports are not
usable in this case.
2.7 Internal storage
There is one dual channel Ultra320 SCSI controller managed by the EADS-X chips,
integrated into the system planar, that is used to drive the internal disk drives. The eight
internal drives plug into the disk drive backplane, which has two separate SCSI buses with
four disk drives per bus.
The internal disk drive can be used in two different modes based on whether the SCSI RAID
Enablement Card (FC 1976) is installed (see 2.7.3, “RAID options” on page 29).
The OpenPower 720 supports a split 8-pack disk drive backplane that is designed for
hot-pluggable disk drives. The disk drive backplane docks directly to the system planar. The
virtual SCSI Enclosure Services (VSES) hot-plug control functions are provided by the
Ultra320 SCSI controllers.
2.7.1 Internal media devices
The OpenPower 720 provides two slim-line media bays for an optional DVD-ROM (FC 1994)
and optional DVD-RAM (FC1993), and one media bay for a tape drive. These features are
summarized in Table 2-3.
Feature code Adapter description Slot Size Max
1975 Ultra320 SCSI RAID, bootable 64 long 4
1974 Ultra320 SCSI 64 short 5