RAID1 with 2 SSDs - on board RAID or ZFS?

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wywywywy

Active Member
Dec 6, 2017
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Hi all,

I have a spare HP Microserver N54L that I want to put Proxmox on and have a go.

It will have two SSDs only in RAID 1. But should I use the built in RAID 1 of the storage controller, or do it through ZFS? Is there any practical difference? And how about TRIM support?

On a related note, is MLC vs 3D-TLC still a thing? Or does it not matter nowadays?

Thanks.
 
Actually I followed the link to the Github issue and the thread seems to suggest that the change has been merged?
 
nope, it has been closed in favor of a new PR: https://github.com/zfsonlinux/zfs/pull/5925 which has not been merged yet (and when it gets merged, in will be released with 0.8 or even 0.9, and not as part of a 0.7 bug fix update)
 
Thanks. I think I'll go for ZFS anyway. Hopefully the built-in garbage collector works ok.

I've got the 2 SSDs delivered today and I'm currently burning the ISO and printing the 2.5 to 3.5 adapters for use in the caddies.
 
You can eliminate it (at least partially) by keeping enough free space for garbage collection. I have left ~20% unallocated, and i/o-speed seems to be not changing...
 
Yeah thanks, I had an oops that made a mess of things on that server. Didn't have autoexpand set when swapping out bigger drives, and the zpool filled b/c I moved more to it & missed that it hadn't expanded. I probably just need to nuke it and rebuild.

Rhinox said:
You can eliminate it (at least partially) by keeping enough free space for garbage collection. I have left ~20% unallocated, and i/o-speed seems to be not changing...
Click to expand...
 
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