Question 86 - D-PSC-MN-01 discussion

When performing drive replacements on a Dell EMC PowerScale Gen 6 node, it's crucial to adhere to specific time constraints to prevent unintended system behaviors.

Maximum Time Before Automatic SmartFail:

15 Minutes: If a drive sled is removed from its slot for more than 15 minutes, OneFS will automatically initiate a SmartFail process for all drives in that sled.

This time limit ensures data integrity by triggering data protection mechanisms if a drive is presumed lost.

Procedure Details:

Drive Sled Removal:

Carefully remove the sled containing the target drive.

Ensure that you have the replacement drive ready to minimize downtime.

Time Management:

Keep the sled out of the chassis for no more than 15 minutes.

Plan the replacement procedure to stay well within this time frame.

Consequences of Exceeding Time Limit:

Exceeding 15 minutes causes the system to treat the drives as failed.

The SmartFail process begins, impacting system performance and prolonging maintenance.

Dell PowerScale

Reference:

Dell EMC PowerScale Hardware Replacement Guide:

Section on Drive Replacement Procedures:

Specifies the 15-minute time limit for drive sled removal.

Emphasizes the importance of adhering to this limit to prevent unintended SmartFails.

Best Practices:

Preparation:

Have all necessary tools and replacement drives ready before starting.

Monitoring:

Use a timer to ensure the sled is reinserted within the allotted time.

Post-Replacement:

Verify the new drive is recognized and the cluster health is optimal.