I am in the middle of shrinking my array while preserving parity according to these instructions. I have zeroed the 1st data disk. I have 2 questions about next steps. [1] I presume I could zero the 2nd data disk & then do a new config, or must I go through the whole process once per disk? [2] If I were to start the array sans zeroed disk, with parity preserved checked, I'm still warned about writes to parity. Is this expected behavior on v6.12.13?

On reflection, I suspect I did not toggle on retaining the array configuration. Does this change things? I do have a spreadsheet of my assignments.

Yes the message isn't suppressed invalid when "parity is already valid" is checked. It won't be overwritten then.

 

With dual parity I think you need to do both separately.

Edited November 24, 20241 yr by Kilrah

1 minute ago, inkindar said:

On reflection, I suspect I did not toggle on retaining the array configuration. Does this change things? I do have a spreadsheet of my assignments.

 

As long as everything you want to keep is put back in the same slot it's fine. You cannot move slots around with dual parity if you want to keep it, i.e. if one disk you remove is in the middle you'll have to live with an empty slot. 

Thanks for the assurances. The warnings indeed didn't apply.

For the record, I indeed have 2 parity disks. 

 

I'm also locked in to one iteration per disk by my experimentation, so I can't comment on the outcome of zeroing all disks before a config, but I imagine it would have worked out.