Storage DRS Recommendations details

 

You can apply a subset of the recommendations by selecting the Override Suggested DRS Recommendations
check box and selecting each recommendation to apply

Label	Description
Priority	Priority level (1-5) of the recommendation. (Hidden by default.)
Recommendation	Action being recommended by Storage DRS
Reason	Why the action is needed.
Space Utilization % Before (source) and (destination)	Percentage of space used on the source and destination datastores before migration.
Space Utilization % After (source) and (destination)	Percentage of space used on the source and destination datastores after migration.
I/O Latency Before (source)	Value of I/O latency on the source datastore before migration.
I/O Latency Before (destination)	Value of I/O latency on the destination datastore before migration.

How to enable Ignore Storage DRS Affinity Rules for Maintenance Mode

Storage DRS affinity or anti-affinity rules might prevent a datastore from entering maintenance mode. You can ignore these rules when you put a datastore in maintenance mode.

Procedure

1. In the vSphere Client inventory, right-click a datastore cluster and select Edit Settings.
2. In the right pane of the Edit Datastore Cluster dialog box, select SDRS Automation.

3. Click Advanced Options.
4. Select IgnoreAffinityRulesForMaintenance.
5. In the Value column, type 1 to enable the option.
Type 0 to disable the option.(Default option as shown in figure below)

6 Click OK.

SDRS Runtime Rules

Utilized Space: Storage DRS generates recommendations or performs migrations when the percentage of space utilization on the datastore is greater than the threshold you set in the vSphere Client. In below case space threshold is configured at 80% utilized space. When space of datastore exceeds 80% space utilization threshold Storage DRS is invoked.

I/O latency: Storage DRS generates recommendations or performs migrations when the 90th percentile I/O latency measured over a day for the datastore is greater than the threshold