.rrd files all failed writing at once - I/O write failure during scrub causes pool degredation

[fossnik]

Do you want to just copy all the current data over to the 8TB drive and use it as a single drive pool? Is your system physically large enough for you to put all the drives in the system at the same time?

Yeah, I just want to copy all the data. I have all three drives plugged in at the same time now.

 

[Chris Moore]

I would suggest zfs send and zfs receive. This method has been discussed a before on the forum and you can probably find a lot of info on it with a search. Here are a couple good links:

I have given this sort of advice many times on the forum:
https://www.ixsystems.com/community/threads/assistance-failing-drives.73898/post-518692
and
https://www.ixsystems.com/community...nd-snapshots-to-another-box.73322/post-508081

Basic idea is, create a new pool on the new drive. Create a snapshot of the pool on the stripe set. Use ZFS send to send that snapshot to the new pool. It makes a perfect copy as of the time the snapshot was taken. Just don't make any changes and the time to completion is dictated by how fast your new drive can write data.

You will probably want to be setup to SSH in to your NAS because this is mostly command line work.

 

[fossnik]

Thanks. You have been very helpful. I am at a bit of a crossroads... I love FreeNAS - even as a casual user, it has always been easy to use and worked flawlessly, but I'm not sure at this point if I ought to invest in building a new system, or just take my snapshot and keep it handy, so I can import it / mount on my linux workstation as needed. The portability of a drive enclosure might be preferable to having an always-on NAS. One sticking point is that I never exactly figured out the right way to do OS virtualization with FreeNAS - it wasn't practical for me to devote an entire physical block device to each virtual machine.
So I am kind of weighing my options.. It seems like you have built some pretty awesome NAS systems, with lots drives, but I am curious if you have any hardware recommendation for a much smaller-scale system. I'm thinking just a simple mirror, two 8TB drives. I would definitely build a new FreeNAS rig if I could also somehow get a little more versatility in OS level virtualization (like VirtualBox, where virtual machines are stored as files)

 

[Chris Moore]

I never exactly figured out the right way to do OS virtualization with FreeNAS - it wasn't practical for me to devote an entire physical block device to each virtual machine.

That is not how it works. Also, there have been new developments with regard to virtualization in the 11.2 series with more on the way. You should take some time to read up on the new features. There are also some videos that discuss it on YouTube.
Take a look:
https://www.youtube.com/watch?v=B8tIFnjzV90
https://www.youtube.com/watch?v=tw0ds0lElf8

 

[fossnik]

I wasn't able send the snapshot to my new pool successfully because of those pesky .rrd files. Checksum mismatch or incomplete stream it says.
Should I just delete them? How do I clear this error?