Avago Technologies MegaRAID Fast Path Software - Manual (Page 236)

Page 236 LSI Corporation Confidential | July 2011
MegaRAID SAS Software User Guide Chapter 5: MegaRAID Command Tool | Patrol Read-Related Controller Properties
NOTE: This command is reserved strictly for the SAS 8888ELP RAID controller at this
time. You must enable specific ports depending on how you intend to use the controller
5.9 Patrol Read-Related
Controller Properties
You can use the commands in this section to select the settings for patrol read. A patrol
read scans the system for possible drive errors that could lead to drive failure, then
takes action to correct the errors. The goal is to protect data integrity by detecting drive
failure before the failure can damage data. The corrective actions depend on the virtual
drive configuration and the type of errors. Patrol read affects performance; the more
iterations there are, the greater the impact.
5.9.1 Set Patrol Read Options Use the command in the following table on the selected controllers to set the patrol
read options.
Table 58: Set Connector Mode
Convention MegaCli -AdpSetConnectorMode
-Internal|-External|-Auto
-ConnectorN|-Connector0,1|-ConnectorAll
-aN|-a0,1,2|-aALL
Description Sets (enables) the connectors listed in the GetConnectorMode command.
For example, to enable internal ports 4-7 on controller 0, run the following
command:
MegaCli –AdpSetConnectorMode –Internal –Connector1
–a0
Table 59: Set Patrol Read Options
Convention MegaCli –AdpPR –Dsbl|EnblAuto|EnblMan|Start|Stop|-Suspend|-Resume|Info |
{-SetStartTime yyyymmdd hh} | maxConcurrentPD -aN| -a0,1,2|-aALL
Description Sets the patrol read options on a single controller, multiple controllers, or all controllers:
-Dsbl : Disables the patrol read for the selected controllers.
-EnblAuto : Enables the patrol read automatically for the selected controllers.
This means the patrol read will start automatically after the controller initialization is complete.
-EnblMan : Enables the patrol read manually for the selected controllers. This means that the patrol read does not start
automatically; it has to be started manually by selecting the Start command.
-Start : Starts the patrol read for the selected controllers.
-Stop : Stops the patrol read for the selected controllers.
-Suspend : Suspends the patrol read.
-Resume : Resumes a suspended partol read from the point that the patrol read was suspended.
-Info : Displays the following patrol read information for the selected controllers:
• Patrol read operation mode
• Patrol read execution delay value
• Patrol read status
–SetStartTime yyyymmdd hh : Set the start time for the patrol read in year/month/day format.
–maxConcurrentPD : Sets the maximum number of concurrent drives on which the patrol read runs.