IBM IntelliStation - ps-2

The xSeries 255 contains 10 standard bays with the option of adding an additional six HDD bays. The six standard slim-line hot-swap HDD bays are located on
the upper left half of the front of both tower and rack models. Four removable media bays are located on the right-side front of the chassis. The top bay contains
the standard floppy disk drive and the second bay from the top contains the standard CD-ROM drive. The remaining two removable media bays support tape or
optical drive options.
The standard Ultra320 hot-swap backplane supports six hot-swap HDD bays. The backplane is connected to the integrated dual-channel, Ultra160 SCSI
controller through a standard 16-bit LVD SCSI cable. If internal RAID support is required, this cable can be used to connect the backplane to a supported RAID
controller. A second optional hot-swap backplane with six hot-swap HDD bays is supported for installation directly below the standard backplane. The optional
backplane can be configured as an independent SCSI bus with the addition of an optional SCSI storage controller or it can be configured with the six standard hotswap
HDD bays by connecting each of the hot-swap backplanes to separate connectors of a two- or four-channel RAID controller. The optional backplane cannot
be connected to the integrated SCSI controller if the standard backplane remains connected, and there is no accommodation for connecting the two backplanes
directly.
Supported internal tape drives include a 34-inch terminated SCSI cable for connecting optional tape drives to either a supported SCSI controller or to channel A of
the integrated SCSi controller if the hot-swap backplane is connected to an optional controller. The standard CD-ROM is cabled to the IDE port on the planar
through a two-drop IDE cable.
External attachment of supported SCSI devices requires installation of the optional External SCSI Interface Kit (P/N 32P8164), which provides a SCSI cable with an
external 0.8mm VHDCI connector that attaches to the rear of the chassis and connects at the other end to the 68-pin connector of channel B on the planar.
For additional information regarding internal cabling, refer to Appendix F: Internal Cabling Overview.
Updated 07/01/03
Total Memor y 1 Quantity of RDIMMs Added 2
512MB
(2x256MB
models)
1GB
(2x512MB
models)
256MB
(33L3281)
512MB
(33L3283)
1GB
(33L3285)
2GB
(33L3287) 4
1GB - 2 - - -
2GB - 6 - - -
- 2GB - 2 - -
3GB - 10 - - -
- 3GB 4 2 - -
4GB - 6 4 - -
- 4GB 8 2 - -
5GB - 2 8 - -
- 5GB 4 6 - -
- 6GB - 2 4 -
7GB - 2 4 4 -
- 7GB 4 2 4 -
- 8GB - 6 4 -
9GB - 2 - 8 -
10GB 3
- - 4 8 -
- 10GB - 2 8 -
12GB 3 12GB 3 - - 12 -
16GB 3 16GB 3 8 4
20GB 3
20GB 3
4 8
24GB 3
24GB 3
- 12
This table does not represent all possible memory configurations. Four-way interleaving is assumed
for the purposes of this table. Memory modules may vary in price per MB. Selection of smaller
RDIMMs may provide a more cost-effective alternative to using larger RDIMMs.
1. Network operating systems may limit the maximum amount of addressable memory. See operating
system specifications for further information.
2. To obtain the Quantity of memory identified in the “Total Memory” column, select the appropriate
row and order the quantity of RDIMMs identified in all columns for that row.
3. Requires removal of standard RDIMMs.
xSeries 255 Internal SCSI Cabling
For the latest product & technical information, refer to the Information Sources on pages 2 & 3.
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IBM xSeries 255