Compaq 9900 - Manual (Page 40)

26 Chapter 2 Subsystem Architecture and Components
2.4.3 Device Emulation Intermix
The 9900 subsystem supports an intermix of different device emulations (e.g., 3390-x LVIs,
3380-x LVIs, OPEN-x LUs) on the same ACP pair. Figure 2.8 illustrates an intermix of device
emulation types. The only requirement is that the devices within each array group must
have the same type of track geometry or format, as follows:
„
3390-1, -2, -3 or -9 can be intermixed within an array group.
„
3380-E, -J, or -K can be intermixed within an array group.
„
OPEN-3, -8, -9, -E, -L, and -M can be intermixed within an array group with the following
restrictions:
– OPEN-L devices can only be configured on array groups of 73, 146, or 180 GB HDDs.
– OPEN-M devices can only be configured on array groups of 47 or 180 GB HDDs.
„
OPEN-K cannot be intermixed with other device types within an array group.
Note: For the latest information on supported LU types and intermix requirements, please
contact your Hitachi Data Systems account team.
Note: The 9960 and 9910 subsystems may support different device emulations and intermix
configurations.
4th
ACP
Pair
2nd
ACP
Pair
3rd
ACP
Pair
1st
ACP
Pair
OPEN-3
3390-9
OPEN-9
9900
Controller
Disk Array
Unit
Disk Array
Unit
Disk Array
Unit
Disk Array
Unit
Disk Array
Unit
Disk Array
Unit
3390-9
3390-3
3380-K
Figure 2.8 Sample Device Emulation Intermix