HP Array Configuration Utility 71
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At the low setting level, normal system operations take priority over an array expansion.
•
At the medium setting, expansion occurs for half of the time, and normal system operations occur for the
rest of the time.
•
At the high setting, the expansion takes precedence over all other system operations.
Syntax:
<target> modify ep=high|medium|low|?
where
<target>
is a controller.
Example command:
=> ctrl slot=3 modify ep=high
Setting the surface scan mode
The
surfacescanmode
keyword sets the surface mode for the controller. The available modes are disable,
high, or idle. If you specify the idle mode, you must also specify a surface scan delay value.
Syntax:
<target> modify [ surfacescanmode=disable | idle | high | ? ]
Example commands:
controller slot=1 modify surfacescanmode=high
controller slot=1 modify surfacescanmode=disable
controller slot=1 modify surfacescanmode=idle surfacescandelay=3
Changing the surface scan delay time
The setting for the surface scan delay determines the time interval for which a controller must be inactive
before a surface scan analysis is started on the physical drives that are connected to it.
Surface scan analysis is an automatic background process that ensures that you can recover data if a drive
failure occurs. The scanning process checks physical drives in fault-tolerant logical drives for bad sectors,
and in RAID 5 or RAID 6 (ADG) configurations, it also verifies the consistency of parity data.
Syntax:
<target> modify ssd=#
where
<target>
is a controller and
#
is a number between 1 and 30. This number determines the delay
time in seconds, but you do not need to include units with the command.
Example command:
=> ctrl sn=P56350D9IP903J modify ssd=3
Re-enabling a failed logical drive
If a logical drive has failed and the data on it is invalid or non-recoverable, you can re-enable the logical
drive so that it can be reused. This process preserves the structure of the logical drive and merely deletes
data, whereas a
delete
command applied to a logical drive deletes the logical drive structure as well as the
data.
Syntax:
<target> modify reenable [forced]
Example command:
=> ctrl slot=3 ld 1 modify reenable forced
