Brian Behlendorf bc0b5318aa Prevent scrubbing a read-only pool
While it would be nice to be able to scrub a pool imported read-only
this will currently trip an ASSERT.  Before we can support this there
are some designs challenges which need to be thought through first.

For starters, a read-only import skips reading certain information 
from disk which it knows won't be needed, such as the space maps.
Furthermore, the scrub process expects to be checkpoint it's progress, 
update the on disk error log, and issue repair IO.  None of which 
would be possible when the pool is imported read-only.  

Each of these wrinkles can certainly be handled, but that will take 
some signifcant work.  In the meanwhile we disable the 'zpool scrub' 
command when the pool is imported read-only.

Reviewed-by: Alan Somers <asomers@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #17527
Closes #17717
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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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