Installation guide

Installing an Sx72–UK Upgrade Kit

This appendix describes how to install the Sx72–UK upgrade kit while the

host system and the disk integrated storage elements (ISEs) in the Sx72–HK

storage enclosure are off-line. See Section B.1 for instructions on how to take a

disk ISE off-line.

To make sure the integrity of the host system, follow the steps in this

procedure in order and exactly as instructed.

Note

You must upgrade the two-drive Sx72–HK storage enclosure to contain

four drives before adding any other Sx72 storage enclosures on that

bus of the Sx300 storage array.

Only one Sx72–HK storage enclosure can exist in an Sx300 storage

array at one time.

WARNING

The following procedure assumes that the Sx300 storage array, and the

Sx72 storage enclosures and magazine tape subsystems in the array,

have been correctly installed and conﬁgured according to the standard

bus and conﬁguration guidelines in this guide.

Locate the system conﬁguration sheet and make sure that it is ﬁlled out.

• At this point, the host system must be brought down to continue.

• If the system conﬁguration sheet reﬂects a conﬁguration other than

what is recommended in this guide, you must maintain that particular

conﬁguration throughout this procedure and work to make sure that no

two devices on a DSSI bus have the same DSSI ID number. Should this

Installing an Sx72–UK Upgrade Kit B–1