Btrfs shows incorrect disk size after running a replace command

[Kyle Bentley <kwbent@uab.edu>]

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I have just recently replaced two 750 GB disks with two 1 TB disks.  I
used the replace command to do so, aka "btrfs replace start /dev/sdX
/dev/sdY /mountpoint".  Each replacement went smoothly, with no errors
reporting.  I'm positive that the source and destination drives were
identified correctly.  However, when I run "btrfs filesystem show", the
output is

Label: none  uuid: b2dbc0e4-94fc-4089-9221-d79d7919f8cb
    Total devices 2 FS bytes used 494.23GB
    devid    2 size 698.64GB used 495.03GB path /dev/sda
    devid    1 size 698.64GB used 495.03GB path /dev/sdb

Btrfs v0.20-rc1

The disks show up as the 750 GB, when they are in fact 1 TB.  smartctl
for each drive shows

root@Lore:/home/kyle# smartctl -i /dev/sda |grep "User Capacity"
User Capacity:    1,000,204,886,016 bytes [1.00 TB]

root@Lore:/home/kyle# smartctl -i /dev/sdb |grep "User Capacity"
User Capacity:    1,000,204,886,016 bytes [1.00 TB]

Is there any harm in this?  If it is simply a superficial bug I will not
worry.  Would running a balance help?  As for the specifics, I'm using

Debian testing x64
Vanilla kernel 3.13.0
AMD hardware

Thanks,

Kyle Bentley

- ---------------------------------------
kwbent@uab.edu
UAB Dept of Physics
1300 University Blvd
CH 310
Birmingham, AL
- ---------------------------------------



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