[FileSystem] [ArchLinux] [Disk Encryption] [Btrfs] Btrfs

Fork from here http://www.cnblogs.com/hugetong/p/6914248.html

boot partition, MBR encryption: https://wiki.archlinux.org/index.php/Dm-crypt/Specialties#Securing_the_unencrypted_boot_partition

First, I chose to create btrfs on Luks. View the Btrfs section of the document above.

1. Btrfs does not support swap file and must use swap partition Https://wiki.archlinux.org/index.php/Btrfs#Swap_file

2. It is not recommended to use the Btrfs file system directly on bare disks. Https://wiki.archlinux.org/index.php/Btrfs#Partitionless_Btrfs_disk

3. Btrfs with compression improves performance. Https://wiki.archlinux.org/index.php/Btrfs#Compression

4. New Concept Subvolumes. Https://wiki.archlinux.org/index.php/Btrfs#Subvolumes

This is more detailed, speak more clearly, the above is not very clear on the said ... : Https://btrfs.wiki.kernel.org/index.php/SysadminGuide#Subvolumes

Btrfs Document: Https://wiki.archlinux.org/index.php/Btrfs (with the pile above, obviously is a ...) ）

Multiple disks can be composed of a pool,btrfs support raid0,1, 10, 5, 6. Https://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices

5. Do not use Btrfs RAID5, RAID6 mode.

6. Common commands

Https://btrfs.wiki.kernel.org/index.php/Getting_started#Basic_Filesystem_Commands

7. Maximum capacity 70%??

Be aware this for that size, it would report the full when reaching is about 75%.

-----------------------------------------------------------

1. Initializing a Btrfs file system

1[Email protected] ~ # mkfs.btrfs-l Vd_root-f/dev/mapper/Vd_root:(Btrfs-progs v4.10.2See http://btrfs.wiki.kernel.org for more information.Label:vd_rootUUID:ba0b8b0b-8753-455b-90f6-422f61d59df1node Size:16384Sector Size:4096Filesystem Size: -. 00GiBBlock group Profiles:Data:single8. 00MiB Metadata:dup1. 00GiB System:dup8. 00MiBSSD Detected:noincompat features:extref, skinny-Metadatanumber of Devices:1devices:id SIZE PATH1     -.00gib/dev/mapper/Vd_root[email protected]~ #

2. Create a Subvolume

[Email protected] ~ # Btrfs Subvolume Create mnt/'mnt/real_root'

3. Create a snapshot (obviously from the command point of view, the snapshot is also a subvolume)

[Email protected] ~ # btrfs Subvolume snapshot mnt/real_root mnt/'mnt/real_root' inch ' Mnt/snapshot_of_real_root '

4. Set the default

set-default257  mnt                                      get-default  mnt      2575 Path Real_root

5. Deleting a snapshot or Subvolume

[Email protected] ~ # Btrfs Subvolume list/root/mnt ID257Gen ATop level5Path Real_rootid258Gen -Top level5Path Snapshot_of_real_rootid259Gen ATop level5Path snapshot/Snapshot_of_real_root_2[email protected]~ # Btrfs Subvolume Create mnt/testcreate Subvolume'mnt/test'[email protected]~ # Btrfs Subvolume list/root/mnt ID257Gen ATop level5Path Real_rootid258Gen -Top level5Path Snapshot_of_real_rootid259Gen ATop level5Path snapshot/Snapshot_of_real_root_2id260Gen -Top level5path Test[email protected]~ # btrfs Subvolume Delete mnt/Test Delete subvolume (no-commit):'/root/mnt/test'[email protected]~ # Btrfs Subvolume list/root/mnt ID257Gen ATop level5Path Real_rootid258Gen -Top level5Path Snapshot_of_real_rootid259Gen ATop level5Path snapshot/Snapshot_of_real_root_2[email protected]~ #

6. According to the description in the document, choose Flat method to create Subvolume

Https://btrfs.wiki.kernel.org/index.php/SysadminGuide#Flat

[Email protected] ~# Find MNT mntmnt/real_rootmnt/real_root/rootmnt/real_root/homemnt/Snapshot[email protected]~ # Btrfs SubvolumeGet-defaultMntid257Gen -Top level5path Real_root[email protected]~# btrfs Subvolume list mnt ID257Gen -Top level5Path Real_rootid261Gen inTop level257Path real_root/Rootid262Gen -Top level257Path real_root/Home[email protected]~ #

[FileSystem] [ArchLinux] [Disk Encryption] [Btrfs] Btrfs