btrfs关于raid1的问题处理

raid1 似乎并没有生效

❯ sudo btrfs filesystem show
Label: 'worisur'  uuid: 586d7748-8b6f-47e4-b863-9821ec10c325
        Total devices 2 FS bytes used 811.10GiB
        devid    1 size 1.82TiB used 411.02GiB path /dev/nvme1n1p2
        devid    2 size 1.82TiB used 412.01GiB path /dev/nvme2n1p2
# 两块盘似乎是以raid 0 的方式存储本地数据的。

❯ sudo btrfs filesystem df ./
Data, single: total=819.01GiB, used=810.06GiB    #数据果然仅仅存了一份，而且是以raid 0 的方式存放的
System, RAID1: total=8.00MiB, used=112.00KiB
Metadata, RAID1: total=2.00GiB, used=1.03GiB
GlobalReserve, single: total=512.00MiB, used=0.00B

❯ sudo btrfs filesystem usage ./
Overall:
    Device size:                   3.64TiB
    Device allocated:            823.02GiB
    Device unallocated:            2.83TiB
    Device missing:                  0.00B
    Device slack:                    0.00B
    Used:                        812.13GiB
    Free (estimated):              2.84TiB      (min: 1.42TiB)
    Free (statfs, df):             2.84TiB
    Data ratio:                       1.00
    Metadata ratio:                   2.00
    Global reserve:              512.00MiB      (used: 0.00B)
    Multiple profiles:                  no

Data,single: Size:819.01GiB, Used:810.07GiB (98.91%)  #数据果然仅仅存了一份，而且是以raid 0 的方式存放的
   /dev/nvme1n1p2        409.01GiB
   /dev/nvme2n1p2        410.00GiB

Metadata,RAID1: Size:2.00GiB, Used:1.03GiB (51.51%)
   /dev/nvme1n1p2          2.00GiB
   /dev/nvme2n1p2          2.00GiB

System,RAID1: Size:8.00MiB, Used:112.00KiB (1.37%)
   /dev/nvme1n1p2          8.00MiB
   /dev/nvme2n1p2          8.00MiB

Unallocated:
   /dev/nvme1n1p2          1.42TiB
   /dev/nvme2n1p2          1.42TiB

问题处理

1	`btrfs balance start -dconvert=raid1,soft /`

❯ sudo btrfs filesystem usage ./
Overall:
    Device size:                   3.64TiB
    Device allocated:              1.59TiB
    Device unallocated:            2.04TiB
    Device missing:                  0.00B
    Device slack:                    0.00B
    Used:                          1.58TiB
    Free (estimated):              1.02TiB      (min: 1.02TiB)
    Free (statfs, df):             1.02TiB
    Data ratio:                       2.00
    Metadata ratio:                   2.00
    Global reserve:              512.00MiB      (used: 0.00B)
    Multiple profiles:                  no

Data,RAID1: Size:813.00GiB, Used:810.04GiB (99.64%)
   /dev/nvme1n1p2        813.00GiB
   /dev/nvme2n1p2        813.00GiB

Metadata,RAID1: Size:2.00GiB, Used:1.04GiB (51.89%)
   /dev/nvme1n1p2          2.00GiB
   /dev/nvme2n1p2          2.00GiB

System,RAID1: Size:8.00MiB, Used:144.00KiB (1.76%)
   /dev/nvme1n1p2          8.00MiB
   /dev/nvme2n1p2          8.00MiB

Unallocated:
   /dev/nvme1n1p2          1.02TiB
   /dev/nvme2n1p2          1.02TiB

lux@Worisur /home/3.os/0.btrfs                                                                                 17:36:36
❯ sudo btrfs filesystem df ./
Data, RAID1: total=813.00GiB, used=810.04GiB
System, RAID1: total=8.00MiB, used=144.00KiB
Metadata, RAID1: total=2.00GiB, used=1.04GiB
GlobalReserve, single: total=512.00MiB, used=0.00B

lux@Worisur /home/3.os/0.btrfs                                                                                 17:37:16
❯ sudo btrfs filesystem show ./
Label: 'worisur'  uuid: 586d7748-8b6f-47e4-b863-9821ec10c325
        Total devices 2 FS bytes used 811.08GiB
        devid    1 size 1.82TiB used 815.01GiB path /dev/nvme1n1p2
        devid    2 size 1.82TiB used 815.01GiB path /dev/nvme2n1p2

other

如果任意一块盘坏了，做如下操作，

1	`btrfs replace start 1 /dev/sdb2 /mnt #此处的1 2 为 btrfs filesystem show 看到的磁盘号`