HPE Smart Array SR Gen10 Controller - How to Change the Spare Management Mode
https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=emr_na-a00076345en_us
Changing the spare management mode
The spare management feature provides multiple methods for handling spare behavior. User can choose from the following options:

Dedicated - When the failed data drive is replaced, it must be rebuilt from the data on the spare drive. In Dedicated mode, one spare can be dedicated to multiple arrays.
Auto-Replace Drives - The spare for the failed data drive automatically becomes the replacement data drive. When the spare is replaced, the data drive does not need to be rebuilt. In Auto-replace mode, spare drives cannot be shared between arrays.


HPE Smart Array SR Gen10 User Guide / Published: May 2019 / Edition: 4a
https://support.hpe.com/hpesc/public/docDisplay?docId=emr_na-a00019059en_us

Auto-replace spare
Auto-replace spare allows an activated spare drive to become a permanent member of the drive array.
The original drive location becomes the location of the spare drive.
This method has the benefit of avoiding the copy-back operation after replacing the failed drive

HPE Smart Array SR Gen10 User Guide / Published: November 2017 / Edition: 2

Roaming spare
Roaming spare allows an activated spare drive to become a permanent member of the drive array.
The original drive location becomes the location of the spare drive.
This method has the benefit of avoiding the copy-back operation after servicing the failed drive

Roaming spare replaced to Auto-replace spare (renamed)

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