43
Redundancy Check is a routine maintenance procedure for fault-tolerant disk arrays (those with redundancy)
that ensures all the data matches exactly. Redundancy Check can also correct inconsistencies.
Note
You can use the scheduler to set up a Redundancy Check Schedule.
To set up a schedule, click the menu expander to the right of the
Scheduler
tab
and select
Redundancy Check Schedule
.
Redundancy Check Rate
To change Redundancy Check Rate setting the in Background Activities Settings menu:
1. Click the Redundancy Check Rate drop-down menu and choose a rate:
•
Low
– Fewer system resources to Redundancy Check,
more to data read/write operations.
•
Medium
– Balances system resources between Redundancy
Check and data read/write operations.
•
High
– More system resources to Redundancy Check,
fewer to data read/write operations.
2. Click the
Submit
button.
PDm
Predictive Data Migration (PDM) is the migration of data from the suspect physical drive to a spare drive,
similar to rebuilding a logical drive. But unlike Rebuilding, PDM constantly monitors your physical drives and
automatically copies your data to a spare drive before the physical drive fails and your logical drive goes Critical.
PDM Settings
To change PDM setting the in Background Activities Settings menu:
1. Click the PDM Rate drop-down menu and choose a rate:
•
Low
– Fewer system resources to PDM, more to data read/write operations.
•
Medium
– Balances system resources between
PDM and data read/write operations.
•
High
– More system resources to PDM, fewer to data read/write operations.
2.
Highlight the current values in the block threshold fields and input new values.
Reassigned Block Threshold
range is 1 to 512 blocks.
Error Block Threshold
range is 1 to 2048 blocks.
3. Click the
Submit
button.
t
rAnsition
Transition is the process of replacing a revertible spare drive that is currently part of a disk array with an
unconfigured physical drive or a non-revertible spare drive.
Transition Rate
To change Transition Rate setting the in Background Activities Settings menu:
1. Click the Transition Rate drop-down menu and choose a rate:
•
Low
– Fewer system resources to Transition, more to data read/write operations.
•
Medium
– Balances system resources between
Transition and data read/write operations.
•
High
– More system resources to Transition, fewer to data read/write operations.
2. Click the
Confirm
button.
Promise Technology
Product Manual
