Users guide

337 Intel® RAID Software User Guide
Hot spare A standby drive that can automatically replace a failed drive in a
virtual drive and prevent data from being lost. A hot spare can be
dedicated to a single redundant drive group or it can be part of the
global hot spare pool for all drive groups controlled by the controller.
When a drive fails, the GUI management utility software
automatically uses a hot spare to replace it and then rebuilds the
data from the failed drive to the hot spare. Hot spares can be used
in RAID 1, 5, 6, 10, 50, and 60 storage configurations.
I
Initialization The process of writing zeros to the data fields of a virtual drive and,
in fault-tolerant RAID levels, generating the corresponding parity to
put the virtual drive in a Ready state. Initialization erases all
previous data on the drives. Drive groups work without initialization,
but they can fail a consistency check because the parity fields have
not been generated.
IO policy A virtual drive property indicating whether Cached I/O or Direct I/O
is being used. In Cached I/O mode, all reads are buffered in cache
memory. In Direct I/O mode, reads are not buffered in cache
memory. Data is transferred to cache and the host concurrently. If
the same data block is read again, it comes from cache memory.
(The IO Policy applies to reads on a specific virtual drive. It does not
affect the read ahead cache.)
L
Learning cycle A battery calibration operation performed by a RAID controller
periodically to determine the condition of the battery. You can start
battery learn cycles manually or automatically.
Learn delay interval Length of time between automatic learn cycles. You can delay the
start of the learn cycles for up to 168 hours (seven days).
Learn mode Mode for the battery auto learn cycle. Possible values are Auto,
Disabled, and Warning.
Learn state Indicates that a learn cycle is in progress.
Load-balancing A method of spreading work between two or more computers,
network links, CPUs, drives, or other resources. Load balancing is
used to maximize resource use, throughput, or response time.
Low-power storage
mode
Storage mode that causes the battery pack to use less power, which
saves battery power consumption.
LKM Local Key Management
M
Manufacturing date Date on which the battery pack assembly was manufactured.
Manufacturing name Device code that indicates the manufacturer of the components
used to make the battery assembly.