SSD RAID-1 using Directory or SSD Raid-1 Single disk ZFS?

devinacosta

Active Member
Aug 3, 2017
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I am using Proxmox 6.4 (latest) and initially i was using just a single SSD drive (using directory) method on the box. I now want to ensure that if the SSD dies eventually that I have redundancy. So I added 2 new Intel DC series SSD Drives are created a RAID-1 at the Raid Controller level. I had someone suggest that I should use ZFS (single) disk on the RAID-1, and wanted to get opinions on this!

I know there are benefits like snapshots, compression and other features if i use ZFS on a hardware RAID-1. Would you suggest I just stick to RAID-1 using a directory that is mounted onto the box and shared? or to use ZFS on the RAID-1 with single disk in the pool?

The box is an HP DL360 G8, with 384GB RAM, so has plenty of resources.

Currently each of my Virtualization hosts has about 50-60 KVM VM's running on the box.
 
Do NOT use ZFS on a hardware RAID. It may work, but as stated in our documentation, it can lead to degraded performance and even data loss.

Either put a regular FS on your RAID-1, or put the RAID controller into HBA/IT mode and create a ZFS pool (e.g. 'mirror' would be similar to a RAID-1) out of the individual drives.