Back View - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

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Back view

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IBM TotalStorage DS4300 Fibre Channel Storage Subsystem: Installation, User's, and Maintenance Guide
General-system-error LED
When on, this amber LED indicates that the storage subsystem has a fault,
such as in a power supply, fan unit, or hard disk drive.
The DS4300 single-controller storage subsystem (model 6LU and 6LX) has
a single power supply therefore; when the power supply fails, the
General-system-error LED and the Power-on LED are not lit.
Note: If the General-system-error LED is on continuously (not flashing),
there is a problem with the storage subsystem. Use the storage
management software to diagnose and repair the problem. For more
information, see "Checking the LEDs" on page 97.
Locator LED
When on, this blue light indicates the storage management software is
locating the server.
Hot-swap drive CRU
You can install up to 14 hot-swap drive customer replaceable units (CRUs)
in the storage subsystem. Each drive CRU consists of a hard disk drive and
tray. The drive CRU is also referred to as disk drive modules (DDM).
Note: The DS4300 drive CRU does not have the same form factor as the
EXP100 or the EXP810 storage expansion enclosure drive CRUs.
Filler panel
The storage subsystem comes without drives installed and contains filler
panels in the unused drive bays. Before installing new drives, you must
remove the filler panels and save them. Each of the 14 bays must always
contain either a filler panel or a drive FRU. Each filler panel contains a filler
piece for use with a slim drive.
Drive activity LED
Each drive CRU has a green Drive activity LED. When flashing, this green
LED indicates drive activity. When on continuously, this green LED indicates
that the drive is properly installed.
Drive fault LED
Each drive CRU has an amber Drive fault LED. When on, this amber LED
indicates a drive failure. When flashing, this amber LED indicates that a
drive identify is in progress.
Latch This multipurpose blue latch releases or locks the drive CRU in place.
Tray handle
You can use this multipurpose handle to insert and remove a drive CRU in
the bay.
For information on how to install and replace drive CRUs, see "Working with
hot-swap drives" on page 120. For more information about the LEDs, see "Checking
the LEDs" on page 97.
Figure 2 on page 13 shows the components at the back of the DS4300
dual-controller storage subsystem (model 60U and 60X).