Scrub on It's a Binary World 2.0 https://www.ericsbinaryworld.com/tags/scrub/ Recent content in Scrub on It's a Binary World 2.0 Hugo en Thu, 23 Mar 2017 00:59:17 +0000 btrfs scrub complete https://www.ericsbinaryworld.com/2017/03/22/btrfs-scrub-complete/ Thu, 23 Mar 2017 00:59:17 +0000 https://www.ericsbinaryworld.com/2017/03/22/btrfs-scrub-complete/ <p>This was the status at the end of the scrub:</p> <pre tabindex="0"><code>[root@supermario ~]# /usr/sbin/btrfs scrub start -Bd /media/Photos/ scrub device /dev/sdd1 (id 1) done scrub started at Tue Mar 21 17:18:13 2017 and finished after 05:49:29 total bytes scrubbed: 2.31TiB with 0 errors scrub device /dev/sda1 (id 2) done scrub started at Tue Mar 21 17:18:13 2017 and finished after 05:20:56 total bytes scrubbed: 2.31TiB with 0 errors </code></pre><p>I&rsquo;m a bit perplexed at this information. Since this is a RAID1, I would expect it to be comparing info between disks - is this not so? If not, why? Because I would have expected both disks to end at the same time. Also, interesting to note that the 1TB/hr stopped being the case at some point.</p>

Full post

 Speed of btrfs scrub https://www.ericsbinaryworld.com/2017/03/21/speed-of-btrfs-scrub/ Tue, 21 Mar 2017 22:39:24 +0000 https://www.ericsbinaryworld.com/2017/03/21/speed-of-btrfs-scrub/ <p>Here&rsquo;s the output of the status command:</p> <pre tabindex="0"><code>[root@supermario ~]# btrfs scrub status /media/Photos/ scrub status for 27cc1330-c4e3-404f-98f6-f23becec76b5 scrub started at Tue Mar 21 17:18:13 2017, running for 01:05:38 total bytes scrubbed: 1.00TiB with 0 errors </code></pre><p>So on Fedora 25 with an AMD-8323 (8 core, no hyperthreading) and 24GB of RAM with <a href="http://amzn.to/2n5myAJ">this hard drive</a> and its 3TB brother in RAID1 , it takes about an hour per Terabyte to do a scrub. (Which seems about equal to what a coworker told me his system takes to do a zfs scrub - 40ish hours for about 40ish TB)</p>

Full post