I recently added a second parity disk which is 10TB. My primary parity is 8TB. All other disks in the array are 8TB. I've now decided I need the extra storage so want to make the 10TB HDD parity 1 and use the original parity disk as storage. They both have recently checked valid parity data. Is there any way I can do this without rebuilding the parity? 

 

My idea was to use new config and change parity 2 to parity 1 and add the original parity 1 disk as a new array disk. All the other disks would remain in their same slots, but this will rebuild parity.

2 hours ago, b0ll0xxx said:

I recently added a second parity disk which is 10TB. My primary parity is 8TB. All other disks in the array are 8TB. I've now decided I need the extra storage so want to make the 10TB HDD parity 1 and use the original parity disk as storage. They both have recently checked valid parity data. Is there any way I can do this without rebuilding the parity? 

 

My idea was to use new config and change parity 2 to parity 1 and add the original parity 1 disk as a new array disk. All the other disks would remain in their same slots, but this will rebuild parity.

Not as you describe it as the calculations for parity1 are different to parity2 so they are not simply interchangeable.

 

You could keep the 10TB drive as parity2 and simply remove parity1 ready to use it as a data drive,  this would avoid rebuilding parity.  It all depends on whether running with parity2 present and parity1 missing offends your sense of order

 

Having said that, it is worth mentioning that the calculations for parity1 are simpler than those for parity2, so can impose less load on the CPU.   This tends to affect older CPUs in particular.