I have a question about removing HPA from my system. I have read through the various posts made regarding this and understand what is required to remove it from the system, like run the hdparm -N pxxxxxxxxxx /dev/xxx command, then hdparm -N /dev/xxx to verify that it has been removed.

 

I also understand that I can only do one drive per power cycle, but am a little confused about the rebuilding process. I understand that I will have to do a parity check once hpa is removed but I have it on two drives. Does this mean that I can only do one drive then rebuild parity, then do the second drive and rebuild parity for that drive or can I remove hpa from one drive, cycle the power and remove it from the second drive, then rebuild parity? 

 

One at a time if you want to rebuild.

The parity checking / correction mechanism can only work with one item of disk data (i.e. one disk) changing at a time. so as dgaschk says, do them one at a time with a rebuild after each HPA removal operation. 

That's what I thought but as  I said I was a bit confused. Thanks for the help.

Cheers