Installation guide

Converting a Single-System Conﬁguration to a DSSI VAXcluster Conﬁguration

C.2 Conversion Procedure

C.2.2 Single-System to DSSI VAXcluster Cabling Conversion

Note

Ensure that both host systems and the DECarray are off-line and

powered down.

This procedure explains the steps to recable a DSSI bus conﬁgured for a

single-system application to a DSSI bus conﬁgured for a DSSI VAXcluster

application.

Figure C–3 shows the ﬁve possible single-system bus conﬁgurations.

Figure C–4 shows the three possible DSSI VAXcluster bus conﬁgurations.

The steps describe the conversion of each DSSI bus in the DECarray

individually. Follow each step for all DSSI buses present in the DECarray,

paying careful attention to all warnings, cautions, and notes.

The term DSSI bus n (where n = 1 to 6) refers to the DSSI buses used by the

host system, the DECarray, the SF7x storage enclosures, and the magazine

tape ISEs. In the single-system conﬁguration, the four DSSI buses used are:

DSSI bus 1, color code blue

DSSI bus 2, color code red

DSSI bus 3, color code yellow

DSSI bus 4, color code green

In the DSSI VAXcluster conﬁguration, the six DSSI buses used are:

DSSI bus 1, color code blue

DSSI bus 2, color code red

DSSI bus 3, color code yellow

DSSI bus 4, color code green

DSSI bus 5, color code blue with a white stripe

DSSI bus 6, color code red with a white stripe

Use Table C–2 to convert the existing DECarray from single-system conﬁgured

DSSI buses to the DSSI VAXcluster conﬁguration and to Figures C–3 and C–4

for the actual bus conﬁguration.

C–8 Converting a Single-System Conﬁguration to a DSSI VAXcluster Conﬁguration