Hello,
It appears you recieved a drive that would fit into an HPE ProLiant Server instead of the MSA array. Those drives latch down a bit differently but their size is very similar to what works with an MSA. The problem is when the drive latches down it needs some kind of pressure against the back of the drive to unlatch properly. If you can get a finger nail under the drive edge to porivde a stop, and press the latch button while having a second person try to lift the latch it may be enough to get the latch open to remove the drive.
Cheers,
Shawn
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