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EMC Symmetrix DMX-3 Product Guide
Symmetrix DMX-3 Hardware
Fibre Channel disk subsystem
The Symmetrix DMX-3 disk subsystem are contained in the storage
bays. They are fully redundant components and can be replaced
nondisruptively. The disk subsystems consist of the following
components:
◆ Disk drives — One-inch low-profile 2 Gb/s Fibre Channel disk
drives available in 73 GB, 146 GB, 300 GB, 450 GB, and 500 GB
sizes. A fully populated drive enclosure holds 15 disk drives and
16 drive enclosures per storage bay.
â—† Two link control cards (Fibre Channel interface cards).
â—† Two power supply/cooling modules.
The drive enclosure supports 2 Gb/s back-end fibre interface
(FC-AL). The dual-loop configuration provides redundancy, port
bypass capability, and disk access up to 2 Gb/s per loop.
Disk drives
The Symmetrix DMX-3 uses industry-standard 2 Gb/s Fibre Channel
disk drives for physical disk drives. The disk drives are installed in
the front of storage bays and connect to a midplane. Each disk drive
is integrated with a dual-port Fibre Channel Arbitrated Loop (FC-AL)
controller with Fibre Channel interface that transports SCSI protocol.
The Symmetrix DMX-3 supports Fibre Channel loops ranging from
15 drives to 60 drives per loop. Table 11 on page 63 lists the features
for each type of Symmetrix DMX-3 disk drive.
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