A.4.2 Optical Libraries
The following optical libraries are available.
A.4.2.1 IBM 3995 Optical Library Dataserver
The 3995 combines multifunction optical drives (the number of drives depends
upon the model) with an automated picker and optical cartridge storage to
provide access to up to 376GB (unformatted) of optical storage. The 3995 models
all support both read/writeable as well as WORM optical technology on both
single sided and double sided 5.5″ cartridges. Optical technology is discussed in
2.2.4, “Optical Storage” on page 40. There are 4 types of cartridge:
•
1.3GB at 1024 bytes per sector (double sided)
•
650MB at 1024 bytes per sector (single sided)
•
1.19GB at 512 bytes per sector (double sided)
•
595MB at 512 bytes per sector (single sided)
There are three models directly attachable to the RS/6000:
•
Model A63
The 3995-A63 supports up to 16 optical cartridges giving a maximum total
unformatted capacity of 20GB of data. The unit contains a single
multifunction optical drive and attaches to the host system via either a
SCSI-2 or SCSI-2 differential adapter.
•
Model 063
The 3995-063 supports up to 32 optical cartridges giving a maximum total
unformatted capacity of 40GB of data. The unit contains two multifunction
optical drives, and attaches to the host system via either a SCSI-2 or SCSI-2
differential adapter.
•
Model 163
The 3999 163 supports up to 144 optical cartridges giving a maximum total
unformatted capacity of 188GB of data. The unit contains four multifunction
optical drives and attaches to the host system via a SCSI-2 differential
adapter.
Maximum data rates for the 3995 model optical drives are the same as for the
IBM 7209 optical drive described in A.4.1.1, “IBM 7209” on page 334.
Appendix A. Overview of Hardware Components 335
336 AIX Storage Management
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