Dell PowerFlex 4.6.x Administration Guide

Enable the background device scanner

Enable the background device scanner to check for errors on the devices in the specified storage pool.

1. On the menu bar, click Block > Storage Pools.
2. In the list of storage pools, select the relevant storage pool check box, and click More Actions > Background Device Scanner.
3. In the Set Background Device Scanner for Storage Pool dialog box, select the relevant option for the following settings. By default, all options are selected.
   • Enable Background Device Scanner
   • Fix Local Device Errors— automatically fixes device errors.
   • Compare Data— compare between primary and secondary copies of data.
     NOTE:Zero padding must be enabled in order to set the background device scanner to data compare mode.
   • If Compare Data is selected, select or clear Fix Local Device Errors.
   • Bandwith Limit in KB/S. Default=3072 KB/S
     NOTE:High bandwidth may create negative impact on system performance and should be used carefully and in extreme cases only—for example, when there is an urgent need to check certain devices. When setting the background device scanner bandwidth, you should take into account the maximum bandwidth of the devices.
4. Click Apply.
5. Verify that the operation has finished and was successful, and click Dismiss.