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Update documentation for TRIM/Discard on virtio-blk

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Windows drivers currently don't feature any support for this feature,
only Linux Kernel 5.0+

Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
This commit is contained in:
Stefan Reiter 2019-07-23 12:04:42 +02:00 committed by Thomas Lamprecht
parent ca8c30096d
commit 43975153f0
1 changed files with 4 additions and 4 deletions
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@ -221,10 +221,10 @@ set and a _TRIM_-enabled guest OS footnote:[TRIM, UNMAP, and discard
https://en.wikipedia.org/wiki/Trim_%28computing%29], when the VM's filesystem
marks blocks as unused after deleting files, the controller will relay this
information to the storage, which will then shrink the disk image accordingly.
For the guest to be able to issue _TRIM_ commands, you must either use a
*VirtIO SCSI* (or *VirtIO SCSI Single*) controller or set the *SSD emulation*
option on the drive. Note that *Discard* is not supported on *VirtIO Block*
drives.
For the guest to be able to issue _TRIM_ commands, you must enable the *Discard*
option on the drive. Some guest operating systems may also require the
*SSD Emulation* flag to be set. Note that *Discard* on *VirtIO Block* drives is
only supported on guests using Linux Kernel 5.0 or higher.
If you would like a drive to be presented to the guest as a solid-state drive
rather than a rotational hard disk, you can set the *SSD emulation* option on