Redundancy Check; Pdm - Bosch CIP5000 Series User Manual

36 en | Backgroud activities
Initialization is usually done after a logical drive is created from a disk array. Initialization sets
all data on the logical drive to zero. This operation is useful because the logical drive may have
previously configured legacy data. Therefore, whenever a logical drive is created, initialization
is recommended.
Logical drive initialization rate
To change the Logical Drive Initialization Rate Setting in the Background Activity Settings
menu:
1.
2.
8.1.4

Redundancy check

Redundancy check is a routine maintenance procedure for (redundant) fault-tolerant disk
arrays to ensure exact match of all data. Redundancy checks can also correct inconsistencies.
Notice!
You can use the scheduler to set up a redundancy check schedule.
To set up a schedule, click the menu expander on the right side of the Scheduler tab, and
select the redundancy check schedule.
Redundancy check rate
To change the redundancy check rate setting in the Background Activity Settings menu:
1.
2.
8.1.5

PDM

Predictive data migration (PDM) is the migration of data from a suspect physical drive to a
spare drive, similar to rebuilding a logical drive. Unlike rebuilding, however, the PDM
constantly monitors the physical drive and automatically copies the data to the spare drive
before the physical drive fails and the logical drive goes into critical.
PDM settings
To change PDM settings in the Background Activity Settings menu:
1.
2019-10 | V01 | F.01U.380.030
Click the Logical Drive Initialization Rate drop-down menu and select a rate:
– Low - Less system resources are used for initialization and more system resources
are used for data read / write operations.
– Medium - The system resources between the initialization and data read / write
operations are balanced.
– High - More system resources are used for initialization and less system resources
are used for data read / write operations.
Click the Submit button.
Click the Redundancy Check Rate drop-down menu and select a rate:
– Low - Less system resources are used for redundancy check and more system
resources are used for data read / write operations.
– Medium - The system resources between the redundancy check and data read /
write operations are balanced.
– High - More system resources are used for redundancy check and less system
resources are used for data read / write operations.
Click the Submit button.
Click the PDM Rate drop-down menu and select a rate:
– Low - Less system resources are used for PDM and more system resources are used
for data read / write operations.
– Medium - The system resources between the PDM and data read / write operations
are balanced.
– High - More system resources are used for PDM and less system resources are used
for data read / write operations.
User manual
CIP5000 series storage
Bosch Security Systems B.V.