I'm trying to set up a silent server - now that I have the hardware together and I'm getting software installed I'm starting to run into tons of threads about SSDs being incompatible with Unraid, except all of the data is from years ago or people are giving half-answers and quoting things that seem to be out of date. I'm having a hard time understanding what's actually real.

 

I'm using Unraid Version 6.12.4

 

What I'm trying to accomplish is: 

• 2x SSDs for storage (expandable in the future)
• 1x SSD for parity
• 1x NVME for VMs and containers

 

The main selling point for me was the ability to add drives to my system, although data integrity is also important to me. I'm putting the three SSDs into the Array, and the NVME drive is assigned as the Cache - I thought this was correct structurally, but people are saying SSDs should be in the Cache Pool and the Array needs to have at least one drive in it so this might all be backwards. 

 

There's a lot of noise out there about SSD `trim` commands and ZFS subsystems both breaking drive parity. It's hard to get a straight answer on this one, but I want to make sure my parity drive isn't constantly wrong (without me knowing it). 

 

Any advice or more authoritative documentation would be extremely welcome. Thanks.

Edited October 10, 20232 yr by neznein9

From the documentation:

 

Quote

SSD support in the array is experimental. Some SSDs may not be ideal for use in the array due to how TRIM/Discard may be implemented. Using SSDs as data/parity devices may have unexpected/undesirable results. This does NOT apply to the cache / cache pool. Most modern SSDs will work fine in the array, and even NVMe devices are now supported, but know that until these devices are in wider use, we only have limited testing experience using them in this setting.

 

10 hours ago, neznein9 said:

I'm having a hard time understanding what's actually real.

Any advice or more authoritative documentation would be extremely welcome.

Welcome!

 

As strange as it is, besides the above-posted quote that can be found in the docs, there is no any other official statement given by Limetech on the situation of running SSDs in the array.

There are members on this forum who're reportedly running all SSD arrays for years without problems.

 

There's also a new all SSD, Unraid-oriented NAS system that was promised to be released in September.

It is been advertised to come complete with a pre-installed Basic Unraid License.

There was no word on the drive configuration.

Limetech have acknowledged the legitimacy of the license and product, with a note that it's still being tested.

 

https://www.lincplustech.com/products/lincstation-network-attached-storage-pre-order

 

 

 

Thanks for the responses, it makes sense why there are so many conflicting discussions out there. I guess for now it makes sense to look at alternative options.