what NAS model? What type of raid was configured? 0/1/Jbod?

How can we tell? You need to get at the minimum the kernel logs and something like badblocks and smartctl -a.

Additionally it’s probably 10+ years old? Yea, possibly it’s gone.

Try to connect the drives in another machine without enclosure if possible.

u/mrqwest, No (answer to your question in the title of your post, that ibased on the picture you submitted with your post).

Am I SOL in terms of data retrieval?

as other redditor already suggested, place your question in the r/datarecovery subreddit.

Data recovery is definitely possible, depends on your budget and level condition of the drive --read your own comment that you tried to ‘repair’ it… sometimes that creates more problems than solutions… in that case you’ll need a proffessional data recovery service, which again, depending on your budget and how valuable that data in the drive is to you (you never had a backup of that data?), then it will depend how you can go about recovering the data (or as much as possible) from the drive itself.

If you want to go the data recovery professional service router, then you’ll be best doing a google search in the area where you live, get in contact and go from there.