IBM DS8700, Введение и руководство по планированию

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v With two DS8800 Model 95E expansion units, the DS8800 Model 951 (4-way)
supports up to 1,056 2.5" disk drives, for a maximum capacity of up to 950 GB,
and up to 16 Fibre Channel/FICON adapters.
v
With three DS8800 Model 95E expansion units, the DS8800 Model 951 (4-way)
supports up to 1536 2.5" disk drives, for a maximum capacity of up to 1.4 PB,
and up to 16 Fibre Channel/FICON adapters.
For more information about comparison values for Model 951 and 95E, see
“Overview of physical configurations” on page 89.
DS8800 storage enclosure overview
The DS8800 includes two types of high-density storage enclosure, the 2.5" small
form factor (SFF) enclosure and the new 3.5" large form factor (LFF) enclosure.
The previously introduced DS8800 high-density storage enclosure is a small form
factor (SFF) drive enclosure.The 3.5" enclosure is a large form factor (LFF) drive
enclosure. Both enclosures have the following features:
v Fibre Channel (FC) cable connection
v
A high performance 8 Gbps optical FC-AL fabric attachment from the device
adapter to the storage expansion enclosure
v An enclosure control card providing an FC to SAS bridge, matching industry
standards.
v
Device adapter (DA) attachment, which supports dual-trunked Fibre Channel,
allowing for higher bandwidth and an extra layer of redundancy
Figure 7 shows front and back views of the storage enclosure. This supports 24
SFF, 2.5” SAS drives. The storage enclosure is 2U (EIA units) or 3.5” in height. The
front of the enclosure contains slots for 24 drives, and also contains enclosure-level
status indicators. The back of the enclosure contains:
v
Two power supplies, N+1 for redundancy, each with four cooling elements at
the drawer-level.
v Two interface controller (IC) cards, N+1 for redundancy.
All power and signal cables exit from the back of the enclosure. An exception to
this would be the use of overhead cable management with feature code 1400 (top
exit bracket for Fibre cable). The top exit bracket for Fibre cable is an optional
configuration.
f2c01579
Front View
Status
Indicators
24 SFF Drives
Figure 7. Front view of the storage expansion enclosure
Chapter 1. Introduction to IBM System Storage DS8000 series
11