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Try to clarify wording to reduce zpool add incidents 

Try to clarify wording to reduce zpool add incidents.
Add an attach example.

Reviewed-by: Rich Ercolani <Rincebrain@gmail.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Paul Dagnelie <pcd@delphix.com>
Closes #15179
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Paul Dagnelie 2023-08-26 11:30:19 -07:00 committed by GitHub
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58
man/man8/zpool.8
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@ -110,9 +110,10 @@ Removes ZFS label information from the specified
.It Xo
.Xr zpool-attach 8 Ns / Ns Xr zpool-detach 8
.Xc
Increases or decreases redundancy by
.Cm attach Ns ing or
.Cm detach Ns ing a device on an existing vdev (virtual device).
Converts a non-redundant disk into a mirror, or increases the redundancy level of an existing mirror
.Ns (
.Cm attach Ns ), or performs the inverse operation (
.Cm detach Ns ).
.It Xo
.Xr zpool-add 8 Ns / Ns Xr zpool-remove 8
.Xc
@ -233,16 +234,16 @@ Invalid command line options were specified.
.El
.
.Sh EXAMPLES
.\" Examples 1, 2, 3, 4, 11, 12 are shared with zpool-create.8.
.\" Examples 5, 13 are shared with zpool-add.8.
.\" Examples 6, 15 are shared with zpool-list.8.
.\" Examples 7 are shared with zpool-destroy.8.
.\" Examples 8 are shared with zpool-export.8.
.\" Examples 9 are shared with zpool-import.8.
.\" Examples 10 are shared with zpool-upgrade.8.
.\" Examples 14 are shared with zpool-remove.8.
.\" Examples 16 are shared with zpool-status.8.
.\" Examples 13, 16 are also shared with zpool-iostat.8.
.\" Examples 1, 2, 3, 4, 12, 13 are shared with zpool-create.8.
.\" Examples 6, 14 are shared with zpool-add.8.
.\" Examples 7, 16 are shared with zpool-list.8.
.\" Examples 8 are shared with zpool-destroy.8.
.\" Examples 9 are shared with zpool-export.8.
.\" Examples 10 are shared with zpool-import.8.
.\" Examples 11 are shared with zpool-upgrade.8.
.\" Examples 15 are shared with zpool-remove.8.
.\" Examples 17 are shared with zpool-status.8.
.\" Examples 14, 17 are also shared with zpool-iostat.8.
.\" Make sure to update them omnidirectionally
.Ss Example 1 : No Creating a RAID-Z Storage Pool
The following command creates a pool with a single raidz root vdev that
@ -264,14 +265,21 @@ While not recommended, a pool based on files can be useful for experimental
purposes.
.Dl # Nm zpool Cm create Ar tank Pa /path/to/file/a /path/to/file/b
.
.Ss Example 5 : No Adding a Mirror to a ZFS Storage Pool
.Ss Example 5 : No Making a non-mirrored ZFS Storage Pool mirrored.
The following command converts an existing single device
.Ar sda
into a mirror by attaching a second device to it,
.Ar sdb .
.Dl # Nm zpool Cm attach Ar tank Pa sda sdb
.
.Ss Example 6 : No Adding a Mirror to a ZFS Storage Pool
The following command adds two mirrored disks to the pool
.Ar tank ,
assuming the pool is already made up of two-way mirrors.
The additional space is immediately available to any datasets within the pool.
.Dl # Nm zpool Cm add Ar tank Sy mirror Pa sda sdb
.
.Ss Example 6 : No Listing Available ZFS Storage Pools
.Ss Example 7 : No Listing Available ZFS Storage Pools
The following command lists all available pools on the system.
In this case, the pool
.Ar zion
@ -285,19 +293,19 @@ tank 61.5G 20.0G 41.5G - 48% 32% 1.00x ONLINE -
zion - - - - - - - FAULTED -
.Ed
.
.Ss Example 7 : No Destroying a ZFS Storage Pool
.Ss Example 8 : No Destroying a ZFS Storage Pool
The following command destroys the pool
.Ar tank
and any datasets contained within:
.Dl # Nm zpool Cm destroy Fl f Ar tank
.
.Ss Example 8 : No Exporting a ZFS Storage Pool
.Ss Example 9 : No Exporting a ZFS Storage Pool
The following command exports the devices in pool
.Ar tank
so that they can be relocated or later imported:
.Dl # Nm zpool Cm export Ar tank
.
.Ss Example 9 : No Importing a ZFS Storage Pool
.Ss Example 10 : No Importing a ZFS Storage Pool
The following command displays available pools, and then imports the pool
.Ar tank
for use on the system.
@ -318,7 +326,7 @@ config:
.No # Nm zpool Cm import Ar tank
.Ed
.
.Ss Example 10 : No Upgrading All ZFS Storage Pools to the Current Version
.Ss Example 11 : No Upgrading All ZFS Storage Pools to the Current Version
The following command upgrades all ZFS Storage pools to the current version of
the software:
.Bd -literal -compact -offset Ds
@ -326,7 +334,7 @@ the software:
This system is currently running ZFS version 2.
.Ed
.
.Ss Example 11 : No Managing Hot Spares
.Ss Example 12 : No Managing Hot Spares
The following command creates a new pool with an available hot spare:
.Dl # Nm zpool Cm create Ar tank Sy mirror Pa sda sdb Sy spare Pa sdc
.Pp
@ -341,12 +349,12 @@ The hot spare can be permanently removed from the pool using the following
command:
.Dl # Nm zpool Cm remove Ar tank Pa sdc
.
.Ss Example 12 : No Creating a ZFS Pool with Mirrored Separate Intent Logs
.Ss Example 13 : No Creating a ZFS Pool with Mirrored Separate Intent Logs
The following command creates a ZFS storage pool consisting of two, two-way
mirrors and mirrored log devices:
.Dl # Nm zpool Cm create Ar pool Sy mirror Pa sda sdb Sy mirror Pa sdc sdd Sy log mirror Pa sde sdf
.
.Ss Example 13 : No Adding Cache Devices to a ZFS Pool
.Ss Example 14 : No Adding Cache Devices to a ZFS Pool
The following command adds two disks for use as cache devices to a ZFS storage
pool:
.Dl # Nm zpool Cm add Ar pool Sy cache Pa sdc sdd
@ -359,7 +367,7 @@ Capacity and reads can be monitored using the
subcommand as follows:
.Dl # Nm zpool Cm iostat Fl v Ar pool 5
.
.Ss Example 14 : No Removing a Mirrored top-level (Log or Data) Device
.Ss Example 15 : No Removing a Mirrored top-level (Log or Data) Device
The following commands remove the mirrored log device
.Sy mirror-2
and mirrored top-level data device
@ -394,7 +402,7 @@ The command to remove the mirrored data
.Ar mirror-1 No is :
.Dl # Nm zpool Cm remove Ar tank mirror-1
.
.Ss Example 15 : No Displaying expanded space on a device
.Ss Example 16 : No Displaying expanded space on a device
The following command displays the detailed information for the pool
.Ar data .
This pool is comprised of a single raidz vdev where one of its devices
@ -411,7 +419,7 @@ data 23.9G 14.6G 9.30G - 48% 61% 1.00x ONLINE -
sdc - - - - -
.Ed
.
.Ss Example 16 : No Adding output columns
.Ss Example 17 : No Adding output columns
Additional columns can be added to the
.Nm zpool Cm status No and Nm zpool Cm iostat No output with Fl c .
.Bd -literal -compact -offset Ds