BTRFS scrub

[Jorge Fábregas]

On 01/27/2014 04:47 PM, Chris Murphy wrote:

> Data and metadata checksums enabled with default mount options. 
> They'd have to be explicitly disabled at mount time to not get them.


Thanks Chris for confirming this.  I wasn't sure about it.


> For scrubs that write corrections to disk, the volume needs to be mounted rw, and then:
> 
> btrfs scrub start /mnt
> 
> For read only scrubs you need -r flag to get useful information 
> of what fixes would be done if they were enabled. This works
> whether the device is mounted ro or rw.
> 
> btrfs scrub start -r /mnt

I didn't know about read-only scrubs.  I guess I'll use that because, at
the moment, I'm just using one single disk and therefore btrfs can't fix
any corrupt block.

Thanks!
Jorge