High Capacity Cooling Fans; Power Supplies; Security - NEC S1300 User Manual

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The DAU supports 36GB, 72GB and 146GB hard disk drives. The chassis includes
fifteen Fibre Channel hot-swappable hard disk drive bays for mounting up to fifteen
hard disk drives in easily removable drive carriers. Each bay accommodates 1-inch hard
disk drives.
The design of the drive mounting uses a carrier rail system making it possible to "hot
swap" a drive without shutting down the DAU.

High Capacity Cooling Fans

The DAU contains two power supplies, each of which contains two high capacity
cooling fans. The DAU will be adequately cooled even if one of the fans fails. Also,
should any of the fans fail, they may be replaced without powering down the DAU. The
fans draw air across the hard disk drives and electronics of the system and exhaust out
through the rear panel.

Power Supplies

The DAU contains two auto-sensing 480-watt power supplies at an operating frequency
of 50/60 Hz. With two power supplies installed, in the event of a power supply failure,
the load is transferred to the remaining power supply without interruption to normal
operation.
The power supplies are designed to comply with existing emission standards and
provide sufficient power for a fully loaded system configuration.

Security

A security lock on the front bezel of the DAU prevents unauthorized entry to the
storage drives. Rack-mounted DAUs are also secured in the system cabinet by locking
mechanisms installed on the system rack front and rear doors.
1-4 Disk Array Unit Overview
This Manual:http://www.manuallib.com/nec/s1300ug-disk-array-unit-user-guide.html
Disk Drive Bays
Note:
The DAU contains a hot-swap backplane that requires a
40-pin single connector attachment connector on the drives that you
install.
Note
: The power supplies are not hot swappable unless there
are two supplies installed.