Help please.  I have a single profile cache 'pool' I'm trying to convert to RAID0.  I've tried:

 

btrfs balance start --dconvert=raid0 -mconvert=raid1 /mnt/disks/ud_pool

 

and

 

btrfs balance start --dconvert=raid1 -mconvert=raid1 /mnt/disks/ud_pool

 

neither worked.  What should I be using?  Thanks

 

root@Highlander:~# btrfs fi df /mnt/disks/ud_pool
Data, single: total=176.01GiB, used=72.13GiB
System, DUP: total=8.00MiB, used=48.00KiB
Metadata, DUP: total=3.00GiB, used=450.98MiB
GlobalReserve, single: total=240.84MiB, used=0.00B

 

1 hour ago, DZMM said:

btrfs balance start --dconvert=raid0 -mconvert=raid1 /mnt/disks/ud_pool

There's one too many - before dconvert, it should be -dconvert

thanks - so it's

 

btrfs balance start -dconvert=raid0 -mconvert=raid1 /mnt/disks/ud_pool

 

not

 

btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/disks/ud_pool

 

to go from single profile to RAID0?

Why did you post this in Unassigned Devices plugin support thread? I have split it into its own topic in General Support.

Yes, the first one

BTW, the most used pool configurations are listed here:

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=480421

7 hours ago, trurl said:

Why did you post this in Unassigned Devices plugin support thread? I have split it into its own topic in General Support.

Because I created my second cache pool using Unassigned Devices

 

 

49 minutes ago, johnnie.black said:

Yes, the first one

Thanks

5 minutes ago, johnnie.black said:

BTW, the most used pool configurations are listed here:

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=480421

Thanks - that's where I got the commands from, but I wasn't sure if the command was still correct if converting from single pool

Just now, DZMM said:

but I wasn't sure if the command was still correct if converting from single pool

Commands are always the same, it only matters what you're converting to.

Thanks.  One last question please.  It seems implicit in the description that the command can be run on a live pool - do I need to take any precautions before I start?

7 minutes ago, DZMM said:

It seems implicit in the description that the command can be run on a live pool - do I need to take any precautions before I start?

It can only be run on a live pool, and it's very low risk, but it can go wrong, especially if there are pre-existing issues with the pool, so if possible it's always a good idea to backup any important data before beginning.

Thanks - doing now

 

Edit: Worked fine - took around 15 mins on a 250GB pool

root@Highlander:~# btrfs balance start -dconvert=raid0 -mconvert=raid1 /mnt/disks/ud_pool
Done, had to relocate 177 out of 177 chunks

 

Edited September 18, 20187 yr by DZMM