NAME

DESCRIPTION

SYNOPSIS

zhack

feature stat pool

List feature flags.

zhack

feature enable [-d description] [-r] pool guid

Add a new feature to pool that is uniquely identified by guid, which is specified in the same form as a zfs(8) user property.

The description is a short human readable explanation of the new feature.

The -r flag indicates that pool can be safely opened in read-only mode by a system that does not understand the guid feature.

zhack

feature ref [-d|-m] pool guid

Increment the reference count of the guid feature in pool.

The -d flag decrements the reference count of the guid feature in pool instead.

The -m flag indicates that the guid feature is now required to read the pool MOS.

zhack

label repair device

Repair corrupted labels by rewriting the checksum using the presumed valid contents of the label.

GLOBAL OPTIONS

-c cachefile

Read pool configuration from the cachefile, which is /etc/zfs/zpool.cache by default.

-d dir

Search for pool members in dir. Can be specified more than once.

EXAMPLES

#
 zhack
 feature stat
 tank

for_read_obj:
	org.illumos:lz4_compress = 0
for_write_obj:
	com.delphix:async_destroy = 0
	com.delphix:empty_bpobj = 0
descriptions_obj:
	com.delphix:async_destroy = Destroy filesystems asynchronously.
	com.delphix:empty_bpobj = Snapshots use less space.
	org.illumos:lz4_compress = LZ4 compression algorithm support.

#
 zhack
 feature enable
 -d
 'Predict future disk failures.'
 tank com.example:clairvoyance

#
 zhack
 feature ref
 tank com.example:clairvoyance

SEE ALSO