Dell PERC 4/SI - Manual (Page 50)

l Close the cabinet of the host system.
l Turn power on after completing the safety check.
9. Power on the system.
The controller then detects the RAID configuration from the configuration data on the drives.
Deleting Logical Drives
This RAID controller supports the ability to delete any unwanted logical drives and use that space for a new logical drive. You can have an array with multiple
logical drives and delete a logical drive without deleting the whole array.
After you delete a logical drive, you can create a new one. You can use the configuration utilities to create the next logical drive from a free space (`hole'), and
from the newly created arrays. The configuration utility provides a list of configurable arrays where there is a space to configure. In the BIOS Configuration
Utility, you must create a logical drive in the hole before you create a logical drive using the rest of the disk.
To delete logical drives, perform the following steps in the BIOS Configuration Utility:
1. Select Objects—> Logical Drive from the Management Menu.
The logical drives display.
2. Use the arrow key to highlight the logical drive you want to delete.
3. Press <Del> to delete the logical drive.
This deletes the logical drive and makes the space it occupied available for you to make another logical drive.
Patrol Read
The Patrol Read function is designed as a preventive measure to detect hard drive errors before drive failure can threaten data integrity. Patrol Read can find
and possibly resolve any potential problem with physical drives prior to host access. This can enhance overall system performance because error recovery
during a normal I/O operation may not be necessary.
Patrol Read Behavior
The following is an overview of Patrol Read behavior:
1. Patrol Read runs on all disks on the adapter that are configured as part of an array including hot spares. Patrol Read will not run on unconfigured
drives, which are drives that are not part of an array or that are in a ready state.
2. Patrol Read adjusts the amount of RAID controller resources dedicated to Patrol Read operations based on outstanding disk I/O. For example, if the
server is busy processing I/O operation, then Patrol Read will use less resources to allow the I/O to take a higher priority.
3. Patrol Read operates on all configured physical drives on the controller and there is no method to deselect drives from the Patrol Read operations.
4. If the server reboots during a Patrol Read iteration, Patrol Read will restart from zero percent if in Auto Mode. In Manual Mode, Patrol Read does not
restart upon a reboot. Manual Mode assumes you have selected a window of time dedicated to running Patrol Read and the server will be available
during that time.
Configuration
NOTE: Warning messages display about the effect of deleting an array. You must accept two warning statements before the array deletion is
completed.
NOTICE: The deletion of the logical drive can fail under certain conditions: During a rebuild, initialization or check consistency of a logical drive.