Hi,

 

I have a long parity build on the go.

 

Is it possible to cancel it and have unraid resume or will it just start from the beginning if stopped and started?

 

Thanks

 

What version Unraid?

 

Actually I'm not sure it matters. The recent RCs allow pausing parity check but probably not parity build.

You can also pause a parity sync, but for now and like with a parity check it won't survive a reboot.

Hi

 

If a drive is added after parity is done. Is it just the new drive that has parity made for it or does the whole array get redone ?

 

Thanks

 

When a new drive is added to an existing parity protected array, unRaid will write zeros to the whole of the new disk before it actually adds it to the array;   This ensures that parity is correctly maintained.

 

so to answer your question, it is only the new drive that is written to when it is added to an existing array.

14 minutes ago, Lien1454 said:

Hi

 

If a drive is added after parity is done. Is it just the new drive that has parity made for it or does the whole array get redone ?

 

Thanks

 

Parity doesn't have data from any particular drive, it's the array as a whole. When you add a drive to a parity protected array, you have two options. Either allow unraid to write all zeroes to the drive, completely erasing it and syncing it with existing parity, or setting a new config and invalidating parity so it will rebuild with the new drive intact.

 

Normally when adding capacity, you allow unraid to clear the drive to keep parity valid when it is added. If you have a drive that you want to add that was used in unraid data slot before, and has data you don't wish to lose, you rebuild parity after doing a new config with all the drives where you want them.