- Joined
- May 19, 2017
- Messages
- 1,829
Great news.
When it comes to the # of drives to fit, consider the use case also. For example, I have a single-vdev Z3 array of 8 drives because I'm mostly focused on long-term, bit-rot-free storage, redundancy, etc. 3 disks provide parity, leaving 5 effectively for storage. Of those, I only intend to use 4, capacity-wise, to ensure that FreeNAS can operate efficiently (above 80% storage fill, data transfer performance plummets as FreeNAS starts to pack stuff into nooks and crannies).
My effective data capacity (4 drives) also matches the effective capacity on my backup arrays (RAID5 Oyen Digital Mobius 5 DAS) while using the same hard drives. That way, I only have to keep one spare on hand to drop in for a failure in either system.
If you want something more responsive re: IOPS, you'd want to consider a multi-VDEV system with more hard drives. (For example, a 12-drive pool consisting of two Z2 VDEVs with 6 drives each).
When it comes to the # of drives to fit, consider the use case also. For example, I have a single-vdev Z3 array of 8 drives because I'm mostly focused on long-term, bit-rot-free storage, redundancy, etc. 3 disks provide parity, leaving 5 effectively for storage. Of those, I only intend to use 4, capacity-wise, to ensure that FreeNAS can operate efficiently (above 80% storage fill, data transfer performance plummets as FreeNAS starts to pack stuff into nooks and crannies).
My effective data capacity (4 drives) also matches the effective capacity on my backup arrays (RAID5 Oyen Digital Mobius 5 DAS) while using the same hard drives. That way, I only have to keep one spare on hand to drop in for a failure in either system.
If you want something more responsive re: IOPS, you'd want to consider a multi-VDEV system with more hard drives. (For example, a 12-drive pool consisting of two Z2 VDEVs with 6 drives each).
Last edited: