Section: System Administration (8)
Updated: February 2017
blkzone - run zone command on a device
is used to run zone command on device that support the Zoned Block Commands
(ZBC) or Zoned-device ATA Commands (ZAC). The zones to operate on can be
specified using the offset, count and length options.
argument is the pathname of the block device.
The command blkzone report
is used to report device zone information.
By default, the command will report all zones from the start of the
block device. Options may be used to modify this behavior, changing the
starting zone or the size of the report, as explained below.
|start||Zone start sector|
|len||Zone length in number of sectors|
|wptr||Zone write pointer position|
|reset||Reset write pointer recommended|
|non-seq||Non-sequential write resources active|
|nw||Not write pointer|
|x?||Reserved conditions (should not be reported)|
The command blkzone reset
is used to reset one or more zones. Unlike
this command operates from the block layer and can reset a range of zones.
The command blkzone open
is used to explicitly open one or more zones.
open action, this command operates from the block layer and can open a range
The command blkzone close
is used to close one or more zones. Unlike
close action, this command operates from the block layer and can close a range
The command blkzone finish
is used to finish (transition to full condition)
one or more zones. Unlike
finish action, this command operates from the block layer and can finish a range
By default, the reset, open, close and finish commands will operate from the zone
at device sector 0 and operate on all zones. Options may be used to modify this
behavior as explained below.
option arguments may be followed by the multiplicative suffixes KiB (=1024),
MiB (=1024*1024), and so on for GiB, TiB, PiB, EiB, ZiB and YiB (the "iB" is
optional, e.g., "K" has the same meaning as "KiB") or the suffixes
KB (=1000), MB (=1000*1000), and so on for GB, TB, PB, EB, ZB and YB.
Additionally, the 0x prefix can be used to specify offset
- -o, --offset sector
The starting zone specified as a sector offset. The provided offset in sector
units (512 bytes) should match the start of a zone. The default value is zero.
- -l, --length sectors
The maximum number of sectors the command should operate on. The default value
is the number of sectors remaining after offset. This option cannot be
used together with the option --count.
- -c, --count count
The maximum number of zones the command should operate on. The default value
is the number of zones starting from offset. This option cannot be
used together with the option --length.
- -f, --force
Enforce commands to change zone status on block devices used by the system.
- -v, --verbose
Display the number of zones returned in the report or the range of sectors
- -V, --version
Display version information and exit.
- -h, --help
Display help text and exit.
Shaun Tancheff <firstname.lastname@example.org>
Karel Zak <email@example.com>
The blkzone command is part of the util-linux package and is available from
Linux Kernel Archive