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docs: Fix typo in qemu-nbd -P replacement 

The suggested replacement for the deprecated 'qemu-nbd -P' refers to
'file.backing.opt' instead of 'file.file.opt'; using the example
verbatim results in:

qemu-nbd: Failed to blk_new_open 'driver=raw,offset=1m,size=100m,file.driver=qcow2,file.backing.driver=file,file.backing.filename=file4': A block device must be specified for "file"

Correct this text, prior to actually finishing the deprecation process.

Fixes: 0ae2d54645
Reported-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200123164650.1741798-2-eblake@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Eric Blake 2020-01-23 10:46:49 -06:00
parent deb6ccb077
commit 2e3cb7583a
1 changed files with 1 additions and 1 deletions
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qemu-deprecated.texi
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@ -329,7 +329,7 @@ top of any other existing blockdev. For example, if partition 1 is
can be rewritten as:
@code{qemu-nbd -t --image-opts driver=raw,offset=1M,size=100M,file.driver=qcow2,file.backing.driver=file,file.backing.filename=file.qcow2}
@code{qemu-nbd -t --image-opts driver=raw,offset=1M,size=100M,file.driver=qcow2,file.file.driver=file,file.file.filename=file.qcow2}
Alternatively, the @code{nbdkit} project provides a more powerful
partition filter on top of its nbd plugin, which can be used to select