Power supplies, Disk modules, Power supplies disk modules – Grass Valley K2 Lx0 RAID Storage User Manual

Page 19: Power supply1 power supply 0

July 31, 2008

K2 Lx0 RAID Instruction Manual

Power supplies

Power supplies

There are two auto-ranging power supplies, each with a power cord. Each supply
supports a fully configured K2 Lx0 External RAID and shares load currents with the
other supply, if it is present. The power supplies are designed so as to protect the disk
drives if you install them while the K2 Lx0 External RAID is powered up. A disk with
power-related faults will not adversely affect the operation of any other disk.

Each power supply has status LEDs visible from the rear panel. The status LEDs are
described in the

“Interpreting power supply status LEDs” on page 39

. You can add or

remove one power supply in the RAID Storage Chassis while the RAID Storage
Chassis is powered up, but the operation must be completed within two minutes. Even
if a power supply is disabled, the fan in the non-functioning power supply can run off
the second power supply to cool the RAID for a couple of minutes.

Disk modules

Each disk module consists of a SAS or SATA disk drive in a carrier assembly. If a
disk drive fails, and needs replacing, you can do so while the RAID Storage Chassis
is powered up. Replacement disk drives begin rebuilding immediately after being
installed. (See

“Removing and installing disk modules” on page 40

The following table shows how disk modules are identified based on the chassis
address and physical location. The chassis with an address set to 0 contains drives
from 00 to 0B; the expansion chassis are numbered X0 through XB, where X indicates
the chassis number.

For information on cabling expansion chassis, see the K2 Storage System Instruction
Manual

An operating primary RAID chassis must have, at a minimum, the first three physical
drives (00 - 02) installed, as the RAID configuration information is written to these
drives. Microcode is also written to these disks when RAID controller microcode is
loaded.

The SAS and SATA disk drives are shown in the following illustrations. The SATA
drive has an adapter to fit it to the K2 Lx0 RAID Chassis.

BBU IN

MODEM

FLT/LNK

HPE

FLT

A/L

BACKUP

ACT/LNK

LNK/ACT

FLT

5 4 3 2

RDY

LAN

BAT

MNT

ACS

DP1

DP0

HP
1 0