Hello, I’m looking for suggestions on a drive layout. I have 56 - 9.1 tb drives, 1 - 2 tb nvme, and 2 - 500 gb ssds (os). I’m trying to find the sweet spot of performance and capacity (like everyone). 80% of my data is media and 10% is VMs. Then some miscellaneous documents and stuff. Sitting abou…

I’m still in process of removing enough disks. I’m getting close to the minimum I need to start migrating, but am not sure what layout to do. I’m hesitant for a bunch of mirrors as I’m hoping not to end up with that “low” of capacity.

Capacity wise, 4x14-Wide RAIDZ3 VDEVs should give you 70% or so usable capacity with a decent amount of redundancy. RAIDZ2 would be closer to 80% (but with a larger array like that I’d be less comfortable using it :slight_smile: ).

Network data c. 135TB of media files, VMs c. 15TB. A few questions about your requirements to help decide what to do with the SSDs/NVME? How do you access the data over the network? SMB or NFS? (Are your network writes Async or Sync? Will an SLOG help? If media files are rarely written, probably …

With spares in mind, perhaps 6x9-Wide RAIDZ2 arrays would be most ideal, keeping two as hot spares to replace any failures as and when (RAIDZ3 is of course ideal but if capacity is important, it becomes a balancing act) I typically keep VMs on mirrored NVMes for better read IOPS (which from what I’…

Will the system be used for VM storage or to actually host VMs? If storage, iSCSI or NFS? Doesn’t really matter. If you’re hosting VM Storage on rust your own real choice is mirrors. And you’ll need a good SLOG too.

[image] Protopia: Network data c. 135TB of media files, VMs c. 15TB. Hosting VMs = mirrors, under 50% use For 15 TB, that would be eight (ten) drives in four (five) 2-way mirrors. Make that twelve/fifteen drives for safer 3-way mirrors. That leaves 41-48 drives for media, in raidz2 or raidz…

Just adding a bit of info. The system has 512 gb of memory. My data is access via iscsi with a couple smb/nfs shares. At the moment I’m limited on ssds and the nvme. The 2 in the system are already used for the os. The nvme is currently used as the cache and it’s 3200 gb. All the hdds are sas. Th…

That is some SERIOUS hardware!!

[image] Protopia: That is some SERIOUS hardware! Jeez, just looked up the chassis. Makes my little lab look like a glorified USB in comparison! I’ll keep spirits high by remembering it’s not about the size of your storage… it’s about what you do with it

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TrueNAS General

winnielinnie May 15, 2024, 1:51am 2

Not to derail, but did you (safely) succeed in removing enough drives from the 54-wide stripe vdev to at least construct a mirror vdev at minimum?

I don’t believe member disks in a stripe vdev can be “upgraded” to a RAIDZx vdev.

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