On Thu, May 7, 2020 at 10:04 PM Andrew Pam <andrew@xxxxxxxxxxxxxx> wrote: > > On 8/5/20 1:55 pm, Chris Murphy wrote: > > OK what's the current output from > > $ sudo btrfs scrub status -d /home > > > > 21 hours ago, the report was that it'd take 9 hours to scrub. > > UUID: 85069ce9-be06-4c92-b8c1-8a0f685e43c6 > scrub device /dev/sda (id 1) status > Scrub started: Thu May 7 15:44:21 2020 > Status: running > Duration: 5:40:13 > Time left: 1:22:58 > ETA: Fri May 8 15:25:44 2020 > Total to scrub: 3.66TiB > Bytes scrubbed: 2.94TiB > Rate: 151.16MiB/s What does 'iotop -d 10 -o' report? I'm expecting around 300MB/s reads. The ETA is +14 hours what you posted 21 hours ago. So yeah that's fakaked, but at least it's not saying it'll be done in year 5544! I've always seen the ETAs be pretty accurate so I don't know what's going on. 3082813.44MB to go divided by 300MB/s is 171 minutes. Or just under 3 hours. So the time left / ETA is wrong based on this rate, if it's a stable rate, which it might not be. The gotcha if the rate is changing due to concurrent load or a decent amount of free space fragmentation, could be to blame. Hence iotop. What are the current mount options for this file system? -- Chris Murphy
