Internal Serial Ports; Internal Storage; Internal Media Devices; Internal Hot Swappable Scsi Disks - IBM p5 550 Technical Overview And Introduction

2.6 Internal serial ports

The serial 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
under AIX) and also a modem can be connected to the HMC. The S1 and S2 ports are not
usable in this case.
If additional serial port functionality is needed, optional PCI adapters are available (PCI 8-port
adapter FC 2943 or PCI 128-port adapter FC 2944).

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 5709) is installed (see 2.7.3, "RAID options" on page 27).
The p5-550 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 p5-550 provides two slim-line media bays for an optional DVD-ROM (FC 2640) and
optional DVD-RAM (FC 5751), and one media bay for a tape drive. These features are
summarized in Table 2-3.
Table 2-3 Available tape drives
Feature code
6258
6134
6120

2.7.2 Internal hot swappable SCSI disks

The p5-550 can have up to eight hot-swappable disk drives plugged in the two 4-pack disk
drives backplanes. The hot-swap process is controlled by the SCSI enclosure service (SES),
which is located in the 4-pack disk drives backplane (AIX assigns the name ses0 to the first
4-pack, and ses1 to the second, if present). The two hot-swappable 4-pack disk drives
backplanes can accommodate the devices listed in Table 2-4.
26
p5-550 Technical Overview and Introduction
virtual serial console
Description
4-mm 36/72 GB tape (LVD)
8-mm 60/150 GB tape (LVD)
VXA 80/160 GB tape (LVD)
is provided by the HMC (logical device vsa0