Enabling And Disabling The Background Device Scanner; Reset The Background Device Scanner Counters - Dell EMC VxFlex Ready Node User Manual
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Configuring the System using the VxFlex OS GUI
Enabling and disabling the background device scanner
Reset the background device scanner counters
Dell EMC VxFlex Ready Node AMS User Guide
232
About this task
The scanner can be enabled on all the devices in the specified Storage Pool. There are
two modes: device only mode, and data comparison mode:
Device only—Perform read operations. Fix from peer on errors.
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Data comparison—Perform the device-only test, and compare the data content
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with peer. Zero padding must be enabled in order to set the background device
scanner to data comparison mode.
To enable or disable the background device scanner, follow these steps:
Procedure
1. In the Backend
>
Pools.
2. From the Command menu or context-sensitive menu, select Set Background
Device Scanner Mode.
The Configure Storage Pool Background Device Scanner window is
displayed. The right pane of the window displays the Storage Pools that you are
configuring.
3. For the Enable Background Device Scanner option, perform one of the
following:
To enable the scanner, select the check box, and proceed to the next step.
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To disable the scanner, clear the check box, and click OK to finish.
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4. Select an option (selected=enable; clear=disable):
a. Device only
b. Data comparison
5. In the Bandwidth Limit box, accept the default or type a number in KB per
second (per device).
The given value should be in the range 10 KB-10 MB (default = 1 MB).
Note:
High bandwidth should be used very carefully for extreme cases only
(such as an urgent need to check some devices), as it may create negative
impact on system performance. Setting the background device scanner
bandwidth should take into account maximum bandwidth of the devices.
6. Click OK.
You can reset background device scanner error counters for specified Storage Pools.
Counters for data comparison errors, or corrected read errors, or both counter types
can be reset.
About this task
To reset counters, follow these steps:
Procedure
1. In the Backend
>
Pools.
Storage view, navigate to, and select the desired Storage
Storage view, navigate to, and select the desired Storage
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