Configurations for the 3995-1xx models

Figure 1 shows a sample hardware configuration for the IBM 3995 Optical Library Dataserver with two parallel channel adapters.

Note: Although Figure 1 shows a configuration with two parallel channel adapters, most 3995-133 and 3995-113 Optical Library Dataservers are ESCON attached.

Figure 1. Sample Hardware Configuration—IBM 3995 Models 131, 132, 133, 111, 112, 113

Each channel adapter can be configured to run in one of the following modes, as shown in Table 1 via the IBM 3995 Optical Dataserver’s RAS package.

Table 1. PCA card speed setting to match CPU channel speeds.
CPU rated channel speed	Optical Library Controller PCA speed setting
High speed DC interlock	1.5 MB/second
2.0 MB/second data streaming	1.9 MB/second
3.0 MB/second data streaming	2.7 MB/second
3.5 MB/second data streaming	3.4 MB/second
4.5 MB/second data streaming	4.5 MB/second
ESCON channel speed	17.5 MB/second