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NAME
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virt-alignment-scan - Check alignment of virtual machine partitions
 
SYNOPSIS
SYNOPSIS
virt-alignment-scan [--options] -d domname
 
virt-alignment-scan [--options] -a disk.img [-a disk.img ...]
 
virt-alignment-scan [--options]
 
DESCRIPTION
BESCHRIJVING
When older operating systems install themselves, the partitioning tools place partitions at a sector misaligned with the underlying storage (commonly the first partition starts on sector C<63>). Misaligned partitions can result in an operating system issuing more I/O than should be necessary.
 
The virt-alignment-scan tool checks the alignment of partitions in virtual machines and disk images and warns you if there are alignment problems.
 
Currently there is no virt tool for fixing alignment problems. You can only reinstall the guest operating system. The following NetApp document summarises the problem and possible solutions: L<http://media.netapp.com/documents/tr-3747.pdf>
 
OUTPUT
 
To run this tool on a disk image directly, use the I<-a> option:
 
$ virt-alignment-scan -a winxp.img
/dev/sda1 32256 512 bad (alignment < 4K)
 
$ virt-alignment-scan -a fedora16.img
/dev/sda1 1048576 1024K ok
/dev/sda2 2097152 2048K ok
/dev/sda3 526385152 2048K ok
 
To run the tool on a guest known to libvirt, use the I<-d> option and possibly the I<-c> option:
 
# virt-alignment-scan -d RHEL5
/dev/sda1 32256 512 bad (alignment < 4K)
/dev/sda2 106928640 512 bad (alignment < 4K)
 

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../align/virt-alignment-scan.pod:1 • ../appliance/libguestfs-make-fixed-appliance.pod:1 • ../builder/virt-builder-repository.pod:8 • ../builder/virt-builder.pod:8 • ../builder/virt-index-validate.pod:1 • ../cat/virt-cat.pod:1 • ../cat/virt-filesystems.pod:1 • ../cat/virt-log.pod:1 • ../cat/virt-ls.pod:1 • ../cat/virt-tail.pod:1 • ../customize/virt-customize.pod:1 • ../daemon/guestfsd.pod:1 • ../df/virt-df.pod:1 • ../dib/virt-dib.pod:1 • ../diff/virt-diff.pod:1 • ../docs/guestfs-building.pod:1 • ../docs/guestfs-faq.pod:1 • ../docs/guestfs-hacking.pod:1 • ../docs/guestfs-internals.pod:1 • ../docs/guestfs-performance.pod:1 • ../docs/guestfs-recipes.pod:8 • ../docs/guestfs-release-notes-1.10.pod:1 • ../docs/guestfs-release-notes-1.12.pod:1 • ../docs/guestfs-release-notes-1.14.pod:1 • ../docs/guestfs-release-notes-1.16.pod:1 • ../docs/guestfs-release-notes-1.18.pod:1 • ../docs/guestfs-release-notes-1.20.pod:1 • ../docs/guestfs-release-notes-1.22.pod:1 • ../docs/guestfs-release-notes-1.24.pod:1 • ../docs/guestfs-release-notes-1.26.pod:1 • ../docs/guestfs-release-notes-1.28.pod:1 • ../docs/guestfs-release-notes-1.30.pod:1 • ../docs/guestfs-release-notes-1.32.pod:1 • ../docs/guestfs-release-notes-1.34.pod:1 • ../docs/guestfs-release-notes-1.36.pod:1 • ../docs/guestfs-release-notes-1.38.pod:1 • ../docs/guestfs-release-notes-1.4.pod:1 • ../docs/guestfs-release-notes-1.40.pod:1 • ../docs/guestfs-release-notes-1.42.pod:1 • ../docs/guestfs-release-notes-1.6.pod:1 • ../docs/guestfs-release-notes-1.8.pod:1 • ../docs/guestfs-release-notes-historical.pod:1 • ../docs/guestfs-security.pod:1 • ../docs/guestfs-testing.pod:1 • ../edit/virt-edit.pod:1 • ../erlang/examples/guestfs-erlang.pod:1 • ../examples/guestfs-examples.pod:1 • ../fish/guestfish.pod:1 • ../fish/libguestfs-tools.conf.pod:1 • ../fish/virt-copy-in.pod:1 • ../fish/virt-copy-out.pod:1 • ../fish/virt-tar-in.pod:1 • ../fish/virt-tar-out.pod:1 • ../format/virt-format.pod:1 • ../fuse/guestmount.pod:1 • ../fuse/guestunmount.pod:1 • ../get-kernel/virt-get-kernel.pod:1 • ../gobject/guestfs-gobject.pod:1 • ../golang/examples/guestfs-golang.pod:1 • ../inspector/virt-inspector.pod:1 • ../java/examples/guestfs-java.pod:1 • ../lib/guestfs.pod:1 • ../lua/examples/guestfs-lua.pod:1 • ../make-fs/virt-make-fs.pod:1 • ../ocaml/examples/guestfs-ocaml.pod:1 • ../perl/examples/guestfs-perl.pod:1 • ../python/examples/guestfs-python.pod:1 • ../rescue/virt-rescue.pod:1 • ../resize/virt-resize.pod:1 • ../ruby/examples/guestfs-ruby.pod:1 • ../sparsify/virt-sparsify.pod:1 • ../sysprep/virt-sysprep.pod:1 • ../test-tool/libguestfs-test-tool.pod:1 • ../tools/virt-list-filesystems:27 • ../tools/virt-list-partitions:27 • ../tools/virt-tar:28 • ../tools/virt-win-reg:32
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po-docs/nl.po, string 1