Pears Posted September 13, 2018 Share Posted September 13, 2018 (edited) Hello, I'm trying to expand an existing array I have on unraid 6.5.3 and am receiving the "Disk in parity slot is not biggest." error. I've attached my diagnostics zip to this post. My array is as follows: Parity Disk 1: 2TB WD Drive Parity Disk 2: 1TB WD Drive Data Disk 1: 1TB Samsung Drive I'm trying to replace Data Disk 1 with a 2TB Seagate drive and add the 1TB Samsung drive as Data Disk 2. I've checked the disk sizes and the 2TB and 1TB drives each match their pair, and all four drives have HPA disabled. I've tried all different combinations to solve the size issue but can't seem to resolve it. Any help would be greatly appreciated! diagnostics-20180913-1600.zip Edited September 16, 2018 by Pears Quote Link to comment
xman111 Posted September 13, 2018 Share Posted September 13, 2018 don't both parity drives need to be larger than the data drives? 1 Quote Link to comment
Pears Posted September 13, 2018 Author Share Posted September 13, 2018 1 minute ago, xman111 said: don't both parity drives need to be larger than the data drives? They can't be exact matches, at least in size? Quote Link to comment
xman111 Posted September 13, 2018 Share Posted September 13, 2018 I'm just guessing here but I thought your 2 2tb drives would both have to be parity drives and the 1tb drives would have to be data. someone smarter than me I'm sure will chime in. Quote Link to comment
JonathanM Posted September 14, 2018 Share Posted September 14, 2018 1 hour ago, Pears said: They can't be exact matches, at least in size? Yes, your data drives can be an exact match of your SMALLEST parity drive. You have a 1TB parity drive, so the largest data drive allowed is 1TB. https://wiki.unraid.net/Parity#Size Quote Link to comment
Pears Posted September 14, 2018 Author Share Posted September 14, 2018 2 minutes ago, jonathanm said: Yes, your data drives can be an exact match of your SMALLEST parity drive. You have a 1TB parity drive, so the largest data drive allowed is 1TB. https://wiki.unraid.net/Parity#Size Got it, thanks for the help! Still learning unRAID after a recent switch from freeNAS. ☺️ Quote Link to comment
trurl Posted September 14, 2018 Share Posted September 14, 2018 Unless you plan to add even more drives (and I don't recommend going for more with such small drives) then you should consider just single parity of 2TB and let all the others be data. 2 Quote Link to comment
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