Hello

 

I am replacing my 3TB parity drive with a 4TB parity drive. I pre-cleared the new drive, then stopped the array, changed my parity from 3TB disk to 4TB disk and left the old 3TB drive as unassigned.

 

I restarted Unraid and it is currently rebuilding parity on the new drive. Once this is done can I simply stop the array, assign the old parity drive as new data drive and restart? Do I have to pre-clear it again or will it be automatically cleared as I add it to the array?

 

thanks

It will automatically get cleared when you add it, but the entire server will be unavailable while this is happening. (Hours)

 

You would probably be better off preclearing it before adding it.

You can skip the preread (-W option I think) to speed it up.

You can skip the preread (-W option I think) to speed it up.

 

thanks

 

It looks like it's -n

 

-n = Do NOT perform preread and postread of entire disk that would allow

            SMART firmware to identify bad blocks.

 

You can skip the preread (-W option I think) to speed it up.

 

thanks

 

It looks like it's -n

 

-n = Do NOT perform preread and postread of entire disk that would allow

            SMART firmware to identify bad blocks.

You probably should not skip the post-read as otherwise you have not validated that the zeroing phase completed correctly.

-W      = skip pre-read, start with "write" of zeros to clear the disk.

          useful if disk has already been completely read to locate bad sectors.

thanks everyone, looks like -W it is. I was only looking at -w.

 

I will give it a go once my new parity drive is completed.