IBM p5 550, Technical Overview And Introduction

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Chapter 2. Architecture and technical overview
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Table 2-9 Ethernet LED descriptions
2.7 Internal storage
One dual channel Ultra320 SCSI controller, managed by the EADS-X chips, is integrated into
the system planar and 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 2.6.3, “Integrated RAID options” on page 36).
The p5-550 or p5-550Q 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 or p5-550Q provides two slim-line media bays for an optical drives and one media
bay for a tape drive. Table 2-10 summarizes these features.
Table 2-10 Available optical and tape drives
LED Light Description
Link Off
Green No link; could indicate a bad cable, not selected, or configuration error
Connection established
Activity On
Off Data activity
Idle
Feature code Description
1892 VXA-320 160/320 GB internal tape drive
1991 36/72 GB 4 mm internal tape drive
1992 IBM 80/160 GB internal tape drive with VXA technology
1993 4.7 GB IDE slimline DVD-RAM drive
1994 IDE slimline DVD-ROM drive
1997 200/400 GB half height Ultrium 2 tape drive