Bull DPX/20, Installing And Maintaining

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Installing and Maintaining a DAS 150
Disk-drive modules
Ready light
(green)
Fault light
(amber)
Busy light
(green)
Disk-drive
module’s label
A disk-drive module, also called a disk module, consists of a disk drive, a power
regulator board, internal cabling, and a plastic carrier. The carrier has a handle and
guides for inserting and holding the module in the storage system’s chassis. A label
attached to the carrier’s top shows the drive module’s size and speed.
Three status lights on the module indicate the following:
Ready light (green) — Lights while the disk-drive module is powered up and ready
for use.
Busy light (green) — Lights while the drive is in use; for example, during formatting
or user I/O operations.
Fault light (amber) — Lights when this module is shut down by the SP because the
module failed. Also lights after you replace the drive, while the replacement drive
spins up to speed.
You can remove or install any one disk-drive module within an array group while the
storage system is running. You should never open a disk-drive module or attempt to
replace any of its internal components.
Power converters (VSCs)
System power
light (green)
System service
light (amber)
Fan fault
light (amber)
VSC fault
light (amber)
The VSCs are dc power modules that convert the installation site’s ac line voltage to
the dc voltages required to power the modules in the storage-system chassis. A
storage system contains two VSCs to provide high-availability operation.