Hello,

I just upgraded to 6.4.1 and would like to upgrade to dual parity,  larger data drives and cache pool.

I only have room for 6 HDD and 2 SSD.

 

Currently I have:

1 x 3TB Parity drive

5 x 3TB Data drives (disk 1 is currently empty as it is failing)

1 x SSD cache drive

 

I would like to upgrade to:

2 x Parity drives (6TB or greater)

4 x Data drives (6TB or greater)

2 x SSD Cache pool

 

Should I upgrade single parity to a larger drive first before removing the failing drive?

Should I remove the failing drive, reassign the others and rebuild parity before upgrading to a larger parity drive?

Or could I remove the failing drive, reassign the others and upgrade to larger dual parity drives all at the same time?

 

Edited February 5, 20188 yr by prtsmgr
Solved

If you want to remove the failing drive best way would be to do a new config with the remaining data drives and new parity, a parity sync will be done at first array start, check that all other disks have healthy SMART reports before doing it though.

You might want to read this thread.  It presents some statistical calculation on the risk involved involving data arrays with no parity, single parity and dual parity.

 

         https://lime-technology.com/forums/topic/50504-dual-or-single-parity-its-your-choice/

 

 

I would suggest reading the entire thread as that were several interesting statistical points and other risks factors discussed.  ('Yes, Virginia, there are other risks of data loss besides drive failures') 

Thank you both for the replies, especially the link frank1940 provided on the benefits of single vs dual parity.

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