这是我的简单设置:
~$ sudo btrfs device usage /
/dev/sda3, ID: 4
Device size: 100.00GiB
Device slack: 103.01MiB
Data,RAID1: 73.00GiB
Metadata,RAID1: 2.00GiB
System,RAID1: 32.00MiB
Unallocated: 24.87GiB
/dev/sdb3, ID: 5
Device size: 100.00GiB
Device slack: 0.00B
Data,RAID1: 73.00GiB
Metadata,RAID1: 2.00GiB
System,RAID1: 32.00MiB
Unallocated: 24.97GiB
# /etc/fstab
UUID=..... / auto compress=zlib,autodefrag,noatime 0 1
~$ mount | grep btrfs
/dev/sda3 on / type btrfs (rw,noatime,compress=zlib:3,space_cache,autodefrag,subvolid=5,subvol=/)
是否可以互换设备以sdb3
获得较低的 ID(可能重置为1
)并因此出现在mount
结果中?
设备顺序是否会影响 I/O 操作的优先级?