B-7
NVRAM
Acronym for non-volatile random access memory. A storage system that
does not lose the data stored on it when power is removed. NVRAM is
used to store firmware and configuration data on the RAID controller.
NVRAM present
A controller property indicating whether an NVRAM is present on the
controller.
NVRAM size
A controller property indicating the capacity of the controller’s NVRAM.
offline
A drive is offline when it is part of a virtual drive but its data is not
accessible to the virtual drive.
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
prior to host access. This enhances overall system performance because
error recovery during a normal I/O operation may not be necessary.
patrol read rate
The user-defined rate at which patrol read operations are run on a
computer system.
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.
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.
Summary of Contents for ThinkServer RD230
Page 1: ...ThinkServer RD230 RD240 and TD230 MegaRAID SAS Software User Guide ...
Page 2: ......
Page 3: ...ThinkServer RD230 RD240 and TD230 MegaRAID SAS Software User Guide ...
Page 16: ...Contents ...
Page 24: ...Contents ...
Page 68: ...2 36 Introduction to RAID ...
Page 252: ...7 10 MegaRAID Storage Manager Window and Menus ...
Page 300: ...8 48 Configuration ...
Page 328: ...9 28 Monitoring System Events and Storage Devices ...
Page 334: ...10 6 Maintaining and Managing Storage Configurations ...
Page 360: ...B 12 Glossary ...
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