Hi All,
Noob here! built this NAS on centoOS in 2012, with 4x2T drives (WD caviar green, 64MB cache). recently migrated to FreeNAS-11.2-U6. two of those drives have errors (offline or unreadable sectors). I bought two replacements: seagate barracuda 7200rpm, 256MB cache. Of my ~3.5T capacity, i'm using 2.44T. I don't need more space anytime soon, but want to architect for expansion. Would love input on two options I see and confirmation that I understand VDEV expansion properly. Options: A) in each of the mirrored VDEV, place one old and one new HDD. B) VDEV1 is all new; VDEV2 is all old. I don't know if it is better to hedge my bets on those older (but still fully working) drives by pairing the old WD with a new Seagate. Or, if mixing old&new in same VDEV would create some issue due to read-write speed differences within the same mirrored VDEV. Then, can anyone also confirm: once I am ready to expand - can I move a VDEV which is currently 2x2T mirrored, to 2x3T or 2x4T by inserting the larger capacity HDD, resilver, then inserting the 2nd larger HDD, and once 2nd resilver the VDEV will expand to larger size?
Appreciate your time to help me think through these options and confirm my understanding on VDEV expansion.
Noob here! built this NAS on centoOS in 2012, with 4x2T drives (WD caviar green, 64MB cache). recently migrated to FreeNAS-11.2-U6. two of those drives have errors (offline or unreadable sectors). I bought two replacements: seagate barracuda 7200rpm, 256MB cache. Of my ~3.5T capacity, i'm using 2.44T. I don't need more space anytime soon, but want to architect for expansion. Would love input on two options I see and confirmation that I understand VDEV expansion properly. Options: A) in each of the mirrored VDEV, place one old and one new HDD. B) VDEV1 is all new; VDEV2 is all old. I don't know if it is better to hedge my bets on those older (but still fully working) drives by pairing the old WD with a new Seagate. Or, if mixing old&new in same VDEV would create some issue due to read-write speed differences within the same mirrored VDEV. Then, can anyone also confirm: once I am ready to expand - can I move a VDEV which is currently 2x2T mirrored, to 2x3T or 2x4T by inserting the larger capacity HDD, resilver, then inserting the 2nd larger HDD, and once 2nd resilver the VDEV will expand to larger size?
Appreciate your time to help me think through these options and confirm my understanding on VDEV expansion.