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1.3.2 Memory features
The processor cards used in the p5-550 system have eight sockets for memory DIMMs that
must be ordered in quads. Each of the memory features available (at the time of writing) listed
in Table 1-4, therefore, provides four DIMMs.
Table 1-4 Memory feature codes
Feature code
4444
4447
4445
4450
4449
It is recommended that each processor card have an equal amount of memory installed.
Balancing memory across the installed processor cards allows distributed memory accesses
that provide optimal performance. The memory controller will detect a variety of memory
configurations of mixed memory sized DIMMs and DIMMs installed in pairs.
1.3.3 Disk and media features
The minimum p5-550 configuration includes a 4-pack disk drive enclosure. A second 4-pack
disk drive enclosure can be installed by ordering FC 6592 or FC 6593; therefore, the
maximum internal storage capacity is 1.17 TB (using the disk drive features available at the
time of writing). The p5-550 also features two slim-line media device bays and one half-height
media bay. The minimum configuration requires at least one disk drive. Table 1-5 shows the
disk drive feature codes that each bay can contain.
Table 1-5 Disk drive feature code description
Feature code
3273
3277
3274
3278
3275
Any combination of DVD-ROM and DVD-RAM drives of the following devices can be installed
in the two slim-line bays:
DVD-RAM drive, FC 5751
DVD-ROM drive, FC 2640
A logical partition running a supported release of the Linux operating system requires a
DVD-ROM drive or DVD-RAM drive to provide a way to boot hardware diagnostics from CD.
Concurrent diagnostics, as provided by AIX, is not available on Linux at the time of writing.
Supplementary devices can be installed in the half-height media bay, such as:
IBM 80/160 GB Internal Tape Drive with VXA Technology, FC 6120
Description
1 GB (4x 256 MB) DIMMs, DDR1 SDRAM
2 GB (4x 512 MB), DIMMs, DDR1
4 GB (4x 1024 MB) DIMMs, DDR1
8 GB (4x 2048 MB) DIMMs, DDR1
16 GB (4x 4096 MB) DIMMs, DDR1
Description
36.4 GB 10 K RPM Ultra3 SCSI disk drive assembly
36.4 GB 15 K RPM Ultra3 SCSI disk drive assembly
73.4 GB 10 K RPM Ultra3 SCSI disk drive assembly
73.4 GB 15 K RPM Ultra3 SCSI disk drive assembly
146.8 GB 10 K RPM Ultra3 SCSI disk drive assembly
Chapter 1. General description
7
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