Installation guide

Installing the SF7x Storage Enclosure in a DECarray Cabinet

6.3 Where to Install the SF7x Storage Enclosure

Storage enclosures must be installed in the DECarray cabinet in ascending

numerical order. Storage enclosure positions are numbered from 1 to 8 on the

left and right chassis side rails. These numbers are visible only when the front

or rear doors of the DECarray cabinet are open.

SF7x storage enclosures can only occupy positions 1, 2, 3, 4, 7, and 8.

In split-bus mode, the following drives are part of the same DSSI bus (note

that split-bus mode is supported in the single-system conﬁguration only):

1. Four drives in position 1 with the two left drives of position 3

2. Four drives in position 2 with the two right drives of position 3

3. Four drives in position 4 with the two left drives of position 8

4. Four drives in position 7 with the two right drives of position 8

Note

In a stripeset conﬁguration, all SF7x storage enclosures must be in

split-bus mode. Each DSSI bus is connected to two ISEs in each SF7x

enclosure. Two DSSI adapter ports are required for each SF7x storage

enclosure.

All SF7x storage enclosures must be in through-bus mode when the DECarray

is in the DSSI VAXcluster conﬁguration:

1. Four drives in position 1

2. Four drives in position 2

3. Four drives in position 3

4. Four drives in position 4

5. Four drives in position 7

6. Four drives in position 8

6–6 Installing the SF7x Storage Enclosure in a DECarray Cabinet