CONFIG_BTRFS_FS_CHECK_INTEGRITY is not enabled in config.

 

When I tried to enable it in the armbian build system, I saw the word "DANGEROUS".

Is this an unstable (or dangerous) feature ? 

Should I enabled it and use it ?

 

if not, how to ensure data integrity ? 

 

6 hours ago, edupv said:

Is this an unstable (or dangerous) feature ? 

Should I enabled it and use it ?

It also has a description

config BTRFS_FS_CHECK_INTEGRITY
	bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
	depends on BTRFS_FS
	help
	  Adds code that examines all block write requests (including
	  writes of the super block). The goal is to verify that the
	  state of the filesystem on disk is always consistent, i.e.,
	  after a power-loss or kernel panic event the filesystem is
	  in a consistent state.

	  If the integrity check tool is included and activated in
	  the mount options, plenty of kernel memory is used, and
	  plenty of additional CPU cycles are spent. Enabling this
	  functionality is not intended for normal use.

	  In most cases, unless you are a btrfs developer who needs
	  to verify the integrity of (super)-block write requests
	  during the run of a regression test, say N

 

6 hours ago, edupv said:

if not, how to ensure data integrity ? 

You can read the btrfs FAQ to start with

2 hours ago, zador.blood.stained said:

It also has a description

config BTRFS_FS_CHECK_INTEGRITY
	bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
	depends on BTRFS_FS
	help
	  Adds code that examines all block write requests (including
	  writes of the super block). The goal is to verify that the
	  state of the filesystem on disk is always consistent, i.e.,
	  after a power-loss or kernel panic event the filesystem is
	  in a consistent state.

	  If the integrity check tool is included and activated in
	  the mount options, plenty of kernel memory is used, and
	  plenty of additional CPU cycles are spent. Enabling this
	  functionality is not intended for normal use.

	  In most cases, unless you are a btrfs developer who needs
	  to verify the integrity of (super)-block write requests
	  during the run of a regression test, say N

 

You can read the btrfs FAQ to start with

Thanks for your explanation.