Users guide

339 Intel® RAID Software User Guide
O
Offline A drive is offline when it is part of a virtual drive but its data is not
accessible to the virtual drive.
P
Patrol read A process that checks the drives in a storage configuration for drive
errors that could lead to drive failure and lost data. The patrol read
operation can find and sometimes fix any potential problem with
drives before host access. This enhances overall system
performance because error recovery during a normal I/O operation
might not be necessary.
Patrol read rate The user-defined rate at which patrol read operations are run on a
computer system.
Predicted battery
capacity status (hold
24hr charge)
Indicates whether the battery capacity supports a 24-hour data
retention time.
Product info A drive property indicating the vendor-assigned model number of
the drive.
Product name A controller property indicating the manufacturing name of the
controller.
R
RAID A group of multiple, independent drives that provide high
performance by increasing the number of drives used for saving and
accessing data.
A RAID drive group improves input/output (I/O) performance and
data availability. The group of drives appears to the host system as
a single storage unit or as multiple virtual drives. Data throughput
improves because several drives can be accessed simultaneously.
RAID configurations also improve data storage availability and fault
tolerance. Redundant RAID levels (RAID levels 1, 5, 6, 10, 50, and
60) provide data protection.
RAID 0 Uses data striping on two or more drives to provide high data
throughput, especially for large files in an environment that requires
no data redundancy.
RAID 00 Uses data striping on two or more drives in a spanned drive group to
provide high data throughput, especially for large files in an
environment that requires no data redundancy.
RAID 1 Uses data mirroring on pairs of drives so that data written to one
drive is simultaneously written to the other drive. RAID 1 works well
for small databases or other small applications that require
complete data redundancy.
RAID 5 Uses data striping and parity data across three or more drives
(distributed parity) to provide high data throughput and data
redundancy, especially for applications that require random access.