How to release the hold bit on a symmetrix device?
symdev -sid 1234 unhold AAAA
Resets the hold bit on a device. The hold bit is automatically removed from a target of a Snap device when the TimeFinder/Snap pair is stopped. However, the unhold argument can be used if there was a problem removing the hold bit.
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symdev -sid 1234 hold AAAASets the hold bit on device AAAA. The hold bit is automatically placed on a target device during a TimeFinder/Snap operation.