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Table 28 shows the supported EXP810 and EXP710 storage expansion enclosures
combinations per redundant drive channel pair in a DS4700 Express configuration.
The table assumes that a DS4700 Express storage subsystem is generally capable
of addressing the maximum of 112 fibre channel hard drives for each redundant
drive channel pair. Note that the maximum number of storage expansion enclosures
per redundant drive channel pair in a DS4700 Express Storage Subsystem
configuration is six. This maximum is one less than the maximum in a DS4800 or
DS4500 storage subsystem configuration because of the 16 internal drive slots in
the DS4700 Express Storage Subsystem.
When intermixing EXP100s, EXP710s and EXP810s, it is recommended that you
do not mix different storage expansion enclosure types in the same drive loop.
Figure 35 on page 59 shows an example of intermixing EXP810s and EXP710s in
different drive loops.
58
IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User's and Maintenance Guide
Table 28. Supported EXP810 and EXP710 enclosure combinations per redundant drive
channel/loop pair in a DS4700 Express configuration
Total
Number
number of
of
drives in
EXP810s
EXP810s
0
0
1
16
2
32
3
48
4
64
5
80
6
96
Total
number of
Number of
drives in
EXP710s/
EXP710s/
EXP100s
EXP100s
6
84
5
70
4
56
3
42
2
28
1
14
0
0
Total
number of
Total
drives in a
number of
mixed
drives in the
EXP710 and
DS4700
EXP810
Express
drive loop
16
=
100
16
=
102
16
=
104
16
=
106
16
=
108
16
=
110
16
=
112
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