Note: Each front-end director and back-end director consists of a set of two
blades, as indicated by the numbers in the figure. A VSD, however, uses a
single slot, but is sold and installed in pairs.
• 8 of 12 I/O slots support different types of devices.
• Slots 1C/2C and 1D/2D are reserved for the first two front-end directors
• Slots 1E/2E and 1F/2F support the installation of both front-end directors
and VSDs
• Slots 1A/2A and 1B/2B support the installation of both back-end directors
and VSDs
The following table shows the order of front-end director (FED) installation. If
the storage system includes internal drives, the controller requires a
minimum of a single pair of back-end directors and can be configured to
support up to two back-end directors. The term "standard" describes a
controller configured with a single back-end director, while "high
performance" describes a controller configured with two back-end directors. A
storage system that does not include any internal drives is referred to as a
"diskless" configuration.
36 Introduction
Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide
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