What’s the status of SMR drivies and the Linux kernel/BTRFS these days?
I seem to recall it didn’t work to well in the past, has this been resolved or should they still be avoided?
Slow write speed isn’t really an issue as my rockstor box is remote (I.e incoming is limited by WAN speeds anyway), having the drives drop offline however would be.
I have a 3TB drive I need to replace at some point (showing a few bad sectors), can’t decide to go for a raid5 with 4TB-5TB drives or a raid1 with 2x 8TB drives.
May 3, 2016, 1:59pm
@Dragon2611 I’m not aware of any progress on this one but haven’t really looked into it any more either.
Linking to a previous post of mine to help others with the context as I know you are already aware of it.
@dolphs Welcome to the Rockstor community. My main concern would be btrfs’s support for the SMR drivers:-
ie from:- http://www.spinics.net/lists/linux-btrfs/msg48072.html
"I assume you have the host-managed SMR drives. This type needs tweaks to
the operating system so the write patterns play well with the SMR
constraints. Btrfs does not support that out of the box, but my
colleague Hannes Reinecke managed to get it working with some minor
changes to the allocator and disabled writing of su…
Anyone else know of any progress or more up to date info.
It seems that from:-
that it depends on if the drive’s smr element is drive or host managed and
pointed to a kernel bug re the Seagate Archive 8TB disks.
which relates a mixed experience still.
I’m not convinced of their utility just yet but as I say I haven’t been following it really.
I can only add that I’ve had no issues with my 2 x 8TB Seagate Archives since installing five months ago. They are not RAIDed, one pool each so can’t vouch for anything more complex.