On Sun, Feb 28, 2016 at 05:15:32PM -0300, Christian Robottom Reis wrote: > Hello there, > > I'm running a btrfs RAID-1 on two 128GB SSDs that were getting kind > of full. I found two 256GB SSDs that I plan to use to replace the 128TB > versions. > > I've managed to do the actual swap using a series of btrfs replace > commands with no special arguments, and the system is now live and > booting from the 256GB drives. However, I haven't actually noticed any > difference in btrfs fi show output, and usage looks weird. Has anyone > seen this before or have a clue as to who?
Device replace doesn't change the amount of the device that the FS will use -- Like most FSes, btrfs has its own concept of the amount of a device it should use. You probably need to run btrfs fi resize on the FS for each device: # btrfs fi resize 1:max /mountpoint # btrfs fi resize 2:max /mountpoint Hugo. > The relevant partition sizes are now (sdb is identical): > > /dev/sda1 * 2048 83888127 41943040 83 Linux > /dev/sda3 92276736 427821055 167772160 83 Linux > > Here's the show output: > > Label: 'root' uuid: 670d1132-00dc-4511-a2f6-d28ce08b4d3a > Total devices 2 FS bytes used 9.33GiB > devid 1 size 13.97GiB used 11.78GiB path /dev/sda1 > devid 2 size 13.97GiB used 11.78GiB path /dev/sdb1 > > Label: 'var' uuid: 815b3280-e90f-483a-b244-1d2dfe9b6e67 > Total devices 2 FS bytes used 56.14GiB > devid 1 size 80.00GiB used 80.00GiB path /dev/sda3 > devid 2 size 80.00GiB used 80.00GiB path /dev/sdb3 > > Those sizes have not changed over the resize; i.e. the original sda1/sdb1 pair > was 14GB and the sda3/sdb3 pair was 80GB, and after the replace, they haven't > changed. > > And usage for / is now weird: > > Overall: > Device size: 27.94GiB > Device allocated: 21.56GiB > Device unallocated: 6.38GiB > Device missing: 0.00B > Used: 18.66GiB > Free (estimated): 3.99GiB (min: 3.99GiB) > Data ratio: 2.00 > Metadata ratio: 2.00 > Global reserve: 208.00MiB (used: 0.00B) > > Data,RAID1: Size:9.00GiB, Used:8.20GiB > /dev/sda1 9.00GiB > /dev/sdb1 9.00GiB > > Metadata,RAID1: Size:1.75GiB, Used:1.13GiB > /dev/sda1 1.75GiB > /dev/sdb1 1.75GiB > > System,RAID1: Size:32.00MiB, Used:16.00KiB > /dev/sda1 32.00MiB > /dev/sdb1 32.00MiB > > Usage for /var also looks wrong, but in a different way: > > Overall: > Device size: 160.00GiB > Device allocated: 160.00GiB > Device unallocated: 2.00MiB > Device missing: 0.00B > Used: 112.28GiB > Free (estimated): 21.20GiB (min: 21.20GiB) > Data ratio: 2.00 > Metadata ratio: 2.00 > Global reserve: 512.00MiB (used: 0.00B) > > Data,RAID1: Size:74.97GiB, Used:53.77GiB > /dev/sda3 74.97GiB > /dev/sdb3 74.97GiB > > Metadata,RAID1: Size:5.00GiB, Used:2.37GiB > /dev/sda3 5.00GiB > /dev/sdb3 5.00GiB > > System,RAID1: Size:32.00MiB, Used:16.00KiB > /dev/sda3 32.00MiB > /dev/sdb3 32.00MiB > > Unallocated: > /dev/sda3 1.00MiB > /dev/sdb3 1.00MiB > > > Version information: > > async@riff:~$ uname -a > Linux riff 4.2.0-30-generic #36~14.04.1-Ubuntu SMP Fri Feb 26 18:49:23 > UTC 2016 x86_64 x86_64 x86_64 GNU/Linux > > async@riff:~$ btrfs --version > btrfs-progs v4.0 > > Thanks, -- Hugo Mills | You stay in the theatre because you're afraid of hugo@... carfax.org.uk | having no money? There's irony... http://carfax.org.uk/ | PGP: E2AB1DE4 | Slings and Arrows
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