Brian Behlendorf 5a03e358fc Update device removal documentation
Make a minor update to the 'zpool remove' man page to clarify both
raidz and draid pools do not support removal, and change sector to
ashift which is what we actually care about.

Update the big theory comment in vdev_removal.c to accurately reflect
which types of vdevs can be removed.  Furthermore, I've added some
discussion for the casual reader to briefly explain the top-level
vdev removal restrictions.  This has been a common area of confusion
and it's not intuitive where they come from without understanding
the implementation details.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Closes #17847
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OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community. This repository contains the code for running OpenZFS on Linux and FreeBSD.

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Official Resources

Installation

Full documentation for installing OpenZFS on your favorite operating system can be found at the Getting Started Page.

Contribute & Develop

We have a separate document with contribution guidelines.

We have a Code of Conduct.

Release

OpenZFS is released under a CDDL license. For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197

Supported Kernels

  • The META file contains the officially recognized supported Linux kernel versions.
  • Supported FreeBSD versions are any supported branches and releases starting from 13.0-RELEASE.
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