Grass Valley K2 Level 3 RAID Dec.09 2005 - Manual (Page 58)

58 Level 3 RAID Instruction Manual November 23, 2005
Glossary
FC-AL address ID
A number that identifies a device as a node on a fibre channel loop. You select the
FC-AL address ID using switches on the RAID controller.
Fibre Channel Disk board
The name for the printed-circuit board within the K2 Media Server that allows the
server to access the Fibre Channel loop and thence the disk drives within a K2 Level
3 Expansion Chassis.
field-replaceable unit
See FRU (field-replaceable unit).
FRU (field-replaceable unit)
A hardware assembly that can be replaced on site, instead of at the point of
manufacture.
hot repair
See replace under power.
hub
An FC_AL switching device that allows multiple servers and targets such as storage
systems to connect at a central point. A single hub configuration appears as a single
loop.
Level 3 RAID Storage
A storage system that includes a chassis, up to 15 disk modules, one or two RAID
controllers, and one or two power supplies. A K2 Level 3 can support up to seven K2
Level 3 Expansion Chassis (with up to 15 disk modules each) in addition to its own
15 disk modules.
K2 Level 3 Expansion Chassis
A storage system that includes a chassis, up to 15 disk modules, one or two expansion
adapters, and one or two power supplies.
LUN (logical unit)
One or more disk modules (each having a head assembly and spindle) bound into a
group - usually a RAID group. The operating system sees the LUN, which includes
one or more disk modules, as one contiguous span of disk space.
memory module
See RC memory module.
node
Any device with a Fibre Channel interface that connects to a Fibre Channel loop.
power supply
An essential element of the storage-system power supply. A storage system can have
two power supplies. With two, it can survive failure of one supply. You can replace a
power supply under power, without interrupting applications.