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You're limited then to only mirroring, you can't do RAID6 or similar on a massive array where you're only giving up 2/10 drives space but can have a 2 disk fail
by problems 9y ago
You're limited then to only mirroring, you can't do RAID6 or similar on a massive array where you're only giving up 2/10 drives space but can have a 2 disk failure. Seems like a lot of wasted disks when the only thing I'm dependent on the NAS for is not losing my TV collection. Right now I know if that if I go out and buy 2 more 4 TB disk I get 8 TB more in my NAS and at the price of an only slightly increased risk of having more than 2 drives fail at once. That's probably my favorite feature of RAID6 for a home NAS.
I actually went custom because those off-the-shelf boxes are either very expensive or have weak CPUs so can't be used for video transcoding very well - it's cheaper to build it yourself, much cheaper if you already have old hardware to dedicate to the task.
- snuxoll 9y agoDifferent use cases I suppose, my FreeNAS box stores my video collection and all the usual stuff but I've also got all the VM's that run my home network stored on it - performance+resliver times are a lot more important to me than storage efficiency.
- deleted 9y ago[deleted]
- problems 9y agoAnd your network-running VMs have high disk IO requirements?
- snuxoll 9y agoAll of my virtual disks are hosted off my FreeNAS, I've got a direct 10GbE link between it and my oVirt host - raw throughput isn't so much the issue most of the time as IOPS are, I've got a local gitlab instance, OpenShift, some PostgreSQL databases, etc. and they like to hammer the crap out of my storage when in use. Having an L2ARC helps out quite a bit, but only having 32GB of memory and wanting to keep most of it for the L1ARC means I still hit my spinning disks regularly (and mirrored vdev's help read IOPS tremendously in this case).