HP Surestore 1200ex - Optical Jukebox Manual page 6

Installing the 2-Drive Upgrade
Note
There are 2 drives installed in each drive enclosure.
If you are upgrading a 1/2-capacity configuration jukebox
that has 4 drives, you will currently be using the top 2 drive
enclosures, and will add 2 drives to the drive enclosure that is
3rd from the top.
If you are upgrading a 1/2-capacity configuration jukebox
with 6 drives, you must add the capacity upgrade (C1159F/G/
H, which includes 3 empty drive enclosures) at the same time
that you add the drive upgrade.
If you are adding two drives to a full configuration with 6, or
10 drives, install the drives in the first available empty drive
enclosure from the top. DO NOT skip drive mounting
locations. See the right-hand box in Figure 1.
If you are upgrading to a 10-drive unit, move the drives at
position #3 down to position #5, move the fan at position #5
up to position #3, and add the new drives in position #6.
Enclosure #3 must not contain drives. Positioning the drives
in this way in a 10-drive upgrade matches the way 10-drive
jukeboxes ship from the factory after February, 1998. This
configuration enables future connection into a high-
availability environment if requested by the customer. See the
left-hand box in Figure 1.
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