* make OpenBSD release list dynamic
* Regenerated docs for 4.4 Release
README and man pages regenerated incorporating documentation updates from Release 4.4
* FreeBSD 13.1 released
Release avaiability made dynamic
macOS refuses to enable TRIM on any disk models that are not in Apple's verified approval list. However, there is a command that you can run via `sudo` to forcibly tell macOS to enable TRIM even though the disk model is unsupported by Apple.
Here we add the instructions to `README.md` for forcibly enabling TRIM support.
In a previous commit we dropped usage of VirtIO Block Media from backing the hard disk device in macOS guests. The instructions therefore are updated here to drop the split between macOS versions that we had previously enabled VirtIO Block Media disks and those we didn't. This simplifies the instructions to a single hard disk name for all supported macOS version installations.
The previous commit removes our usage of VirtIO Block Media as a backing for the macOS hard disk. We therefore need to drop our descriptions of this functionality now we're not using it any more.
Currently, the virtio specification does not include provision for the TRIM (aka DISCARD) command that allows a guest operating system to signal the disk hardware that blocks have become unused so that the underlying device may clear the physical data.
The TRIM/DISCARD command was introduced for SSD disks as an extension to the AHCI specification that is used in SATA systems.
With Virtual Machines we can use this command to tell QEMU's Qcow2 driver to reclaim unused space in the disk image. This ensures the disk image file is kept to the smallest size possible where without the TRIM/DISCARD command it grows to it's maximum configured size and never shrinks again when data is deleted.
Let's swap our default disk driver from `virtio-blk-pci` which does not support TRIM to `ahci` which does.
(We cannot use `virtio-scsi-pci` when running macOS, like we do in our default disk device, because macOS does not support SCSI disks at all on x86_64 systems.)
Martin Wimpress
Phil Clifford
hi-phile
Alan Pope
Luca Weiss
Ryan Barth
Matus Mastena
TenTypekMatus
goosepirate
George Sokianos
DimitrisPa
Donny Kurnia
Dani Llewellyn
Yannick Mauray
interorbital
szorfein
Phil Clifford