I plan to redeploy my SuperMicro server with FreeNAS and need some advice on the best way to configure the drives.
Currently have the following hardware:
192GB ECC RAM
1TB Samsung 970 EVO NVME
18 x 6TB 7200rpm NAS drives
SuperMicro 846 24-bay chasis
My thoughts are to either:
1) 3 x 6 raidz2 vdevs in a pool + 1TB NVMe l2arc
2) buy 2 more 6TB drives and do 2 x 10 raidz2 vdevs in a pool + 1TB NVME l2arc
3) 1 x 18 raidz2 vdev in a pool + 1TB NVMe l2ard (can buy a additional drive and run raidz3)
I like the first option as it gives me up to a 6 disk loss (2 per vdev) before the pool is dead. Spreads the IO over multiple vdevs. Has a better ratio of parity of 2:1 as opposed to 4:1 and 8:1.
I have a secondary SuperMicro 45-bay JBOD enclosure for expansion so this configuration would be permanent for the life of the equipment. I could add additional vdevs to it in 6, 10 or 18 disk chunks down the road.
Currently have the following hardware:
192GB ECC RAM
1TB Samsung 970 EVO NVME
18 x 6TB 7200rpm NAS drives
SuperMicro 846 24-bay chasis
My thoughts are to either:
1) 3 x 6 raidz2 vdevs in a pool + 1TB NVMe l2arc
2) buy 2 more 6TB drives and do 2 x 10 raidz2 vdevs in a pool + 1TB NVME l2arc
3) 1 x 18 raidz2 vdev in a pool + 1TB NVMe l2ard (can buy a additional drive and run raidz3)
I like the first option as it gives me up to a 6 disk loss (2 per vdev) before the pool is dead. Spreads the IO over multiple vdevs. Has a better ratio of parity of 2:1 as opposed to 4:1 and 8:1.
I have a secondary SuperMicro 45-bay JBOD enclosure for expansion so this configuration would be permanent for the life of the equipment. I could add additional vdevs to it in 6, 10 or 18 disk chunks down the road.