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Re: Btrfs scrub going past 100%

On 7/2/21 5:48 PM, Dan Ritter wrote:
Paul wrote: 
I run regular btrfs scrubs through btrfsmaintenance on my disk array without
issues. This time, though, the scrub percentage went over 100%. I kept it
running so that I can file a bug if this is one.

Which package do I file this against? I believe it's in the Linux kernel not
btrfs-progs, but I thought I would ask since I'm new to this.

UUID:             xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
Scrub started:    Thu Jul  1 00:03:28 2021
Status:           running
Duration:         37:13:49
Time left:        21358913:01:19
ETA:              Mon Feb 11 06:18:36 4458
Total to scrub:   29.08TiB
Bytes scrubbed:   29.24TiB  (100.56%)
Rate:             228.79MiB/s
Error summary:    no errors found
Reported to the btrfs list last year, doesn't look like there's
any followup. Check out your time left calculation, too.

They mention "When the filesystem has grown during scrub...". I'm not sure if they mean they increased the size of the FS while it was scrubbing. Definitely not a good idea, IMO.
It is probably significant that over the last year, I see a fair
number of issues with crashes and unrecoverable data on the btrfs list.
I've been using Btrfs for several years. It works quite well. I chose it over ZFS for its flexibility. The only issues I had are mostly my idiocy. Thankfully I was able to recover and didn't lose any data.
Just a data point ;)
On the ZFS list, most of the discussion is about optimal


An update about the scrub: an hour or so later the percentage went back to 1%. I don't remember what happened to the other parameters, but I just cancelled it anyway. I didn't have any errors, thankfully, as usual.


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