The standard advice here seems to be to use XFS if not using cache pool. But you wouldn't know that unless you are very familiar with unRaid and read these forums a lot.

 

The links in the FAQ are still broken btw, I thought the procedure to switch from BTRFS to XFS would be there but I don't see it.

Just now, MrCrispy said:

The standard advice here seems to be to use XFS if not using cache pool. But you wouldn't know that unless you are very familiar with unRaid and read these forums a lot.

Not going to pretend to speak for LT, but I'd assume the reasoning is that a single cache drive formatted as the default BTRFS is very easy to convert to a cache pool (a simple rebalance) for redundancy where as a single cache drive formatted as XFS would require you to copy the files off, reformat, set up the pool, then copy back....

 

My understanding is that btrfs and unRaid is rock-solid if there are no hardware issues, clean power downs are always performed etc.

 

FWIW, I run a single cache as XFS, but everything is backed up weekly to the array for my redundancy.  I can deal with Plex's appdata being out of date by a week in the event of a cache drive failure.

4 minutes ago, MrCrispy said:

The links in the FAQ are still broken btw,

Which one?   I fixed all of them in another post if you follow the linked post in the OP of the FAQ's

I don't know btrfs works, so that may well be true. I'd think that adding a 2nd drive to make a pool (which may well be a different size) is going to be destructive. In any case, if BTRFS is safe then its no issue. If the advice is to use XFS without a pool, as I've read, then IMO the upgrade procedure can easily copy the files off and back, and things should always favor safety first. But again, maybe that's forum advice and not officially from LT.

 

Thanks for pointing me to the updated FAQ link, I missed that, sorry.