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MegaRAID SAS Software User Guide Chapter 5: MegaRAID Command Tool
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Enclosure-Related Options
5.15.17 Set the Mapping Mode of the
Drives to the Selected Controller(s)
Use the command in the following table to set the mapping mode of the physical
devices connected to the selected controller(s).
5.15.18 Perform the Copyback
Operation on the Selected Drive
Use the command in the following table to the perform the Copyback Operation on the
selected Drive.
The copyback feature allows you to copy data from a source drive of a virtual drive to a
destination drive that is not a part of the virtual drive. Copyback is often used to create
or restore a specific physical configuration for a drive group (for example, a specific
arrangement of drive group members on the device I/O buses).
Typically, when a drive fails or is expected to fail, the data is rebuilt on a hot spare. The
failed drive is replaced with a new disk. Then the data is copied from the hot spare to
the new drive, and the hot spare reverts from a rebuild drive to its original hot spare
status. The copyback operation runs as a background activity, and the virtual drive is
still available online to the host.
5.16 Enclosure-Related
Options
The commands in this section are used for enclosures.
5.16.1 Display Enclosure Information
Use the command in the following table to display enclosure information for selected
controller(s).
Table 102: Set the Mapping Mode of the Drive to the Selected Controller
Convention
MegaCli -DirectPdMapping -Enbl|-Dsbl|-Dsply
-aN|-a0,1,2|-aALL
Description Sets the mapping mode of the drives connected to the specified
controller(s).
Enbl
: Enables the direct physical drive mapping mode.
Dsbl
: Disables the direct physical drive mapping mode.
Dsply
: Displays the current state of the direct physical drive mapping.
Table 103: Perform the Copyback Operation on the Selected Drive
Convention
MegaCli -PDCpyBk -Start | -Stop|-ShowProg|-ProgDsply
-PhysDrv[E0:S0] -aN|-a0,1,2|-aALL
Description Performs the copyback operation on the selected physical drive.
Start
: Initializes the copyback operation on the selected drive.
Stop
: Stops the copyback operation on the selected drive.
ShowProg
: Displays a snapshot of the ongoing copyback operation.
ProgDsply
: Allows you to view the ongoing copyback operation. The
routine continues to display progress until at least one copyback is
completed or a key is pressed.
-Physdrv[E0:S0,...]
: Specifies the physical drive enclosure and the
slots for the drives.
Table 104: Display Enclosure Information
Convention
MegaCli –EncInfo -aN|-a0,1,2|-aALL
Description Displays information about the enclosure for the selected controller(s).