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Unable to upgrade storage using two identical 10TB drives.

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So I had a hard drive go out recently and I decided to take the opportunity to get more storage.

 

I decided to put in two 10TB Western Digital drives (one for parity and one for data). I bought two directly from WD: 

https://www.wdc.com/products/internal-storage/wd-red.html

 

So first I put one in the parity drive and had the parity rebuilt. This was a success. I then swapped out a data drive with the other 10TB drive and I am unable to start up the data rebuild process because it says:

 

"Stopped. Disk in parity slot is not biggest."

 

I then figured that I'm in no rush, I'll just swap the two 10TB drives and start again. I swapped out the current 10TB parity drive with the opposite 10TB drive. I'm now at the same spot in the process and I am getting the same message again.

 

 

How do I go about adding this other 10TB drive into my data pool? Can I get some help with this please?

Edited by jeremytodd1

Both Parity 1 AND 2 have to be 10TB for any data drive to be 10TB.  Parity 1 is only 3TB

  • Author
10 minutes ago, Squid said:

Both Parity 1 AND 2 have to be 10TB for any data drive to be 10TB.  Parity 1 is only 3TB

Aw shit. I thought I remember reading that at least one of the parity drives has to be as big as the biggest data drive. I guess I was mistaken.

 

Looks like I'm buying another 10TB drive.

 

Thanks for the help!

  • Community Expert
44 minutes ago, jeremytodd1 said:

Aw shit. I thought I remember reading that at least one of the parity drives has to be as big as the biggest data drive. I guess I was mistaken.

 

Looks like I'm buying another 10TB drive.

 

Thanks for the help!

No, the rule is that all parity drives have to be the same size or larger than the largest data disk.

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