Lenovo ThinkServer RD650, User Manual

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LSI Corporation
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12Gb/s MegaRAID SAS Software User Guide

March 2014
Glossary
Cycle count The count is based on the number of times the near fully charged battery has been
discharged to a level below the cycle count threshold.
D
Default write policy A virtual drive property indicating whether the default write policy is Write Through or
Write Back. In Write Back mode the controller sends a data transfer completion signal to
the host when the controller cache has received all of the data in a transaction. In Write
Through mode the controller sends a data transfer completion signal to the host when
the drive subsystem has received all of the data in a transaction.
Design capacity Designed charge capacity of the battery, measured in milliampere-hour units (mAh).
Design charge
capacity remaining Amount of the charge capacity remaining, relative to the battery pack design capacity.
Design voltage Designed voltage capacity of the battery, measured in millivolts (mV).
Device chemistry Possible values are NiMH (nickel metal hydride) and LiON (lithium ion).
Device ID A controller or drive property indicating the manufacturer-assigned device ID.
Device port count A controller property indicating the number of ports on the controller.
Drive cache policy A virtual drive property indicating whether the virtual drive cache is enabled, disabled, or
unchanged from its previous setting.
Drive group A group of drives attached to a RAID controller on which one or more virtual drives can
be created. All virtual drives in the drive group use all of the drives in the drive group.
Drive state A physical drive or a virtual drive property indicating the status of the appropriate drive.
Physical Drive State
A physical drive can be in any one of the following states:
 Unconfigured Good – A drive accessible to the RAID controller but not configured as a part of
a virtual drive or as a hot spare.
In the output of the StorCLI commands, Unconfigured Good is displayed as UGood .
 Hot Spare – A drive that is configured as a hot spare.

Online – A drive that can be accessed by the RAID controller and will be part of the virtual
drive.
In the output of the StorCLI commands, Online is displayed as onln .

Rebuild – A drive to which data is being written to restore full redundancy for a virtual drive.
 Failed – A drive that was originally configured as Online or Hot Spare, but on which the
firmware detects an unrecoverable error.

Unconfigured Bad – A drive on which the firmware detects an unrecoverable error; the drive
was Unconfigured Good or the drive could not be initialized.
In the output of the StorCLI commands, Unconfigured Bad is displayed as UBad .

Missing – A drive that was Online, but which has been removed from its location.
 Offline – A drive that is part of a virtual drive but which has invalid data as far as the RAID
configuration is concerned.
In the output of the StorCLI commands, Offline is displayed as offln .
 None – A drive with an unsupported flag set. An Unconfigured Good or Offline drive that has
completed the prepare for removal operation.