hv_vss_daemon(8) manual page

The hv_vss_daemon daemon provides the ability to freeze and thaw the file system for FreeBSD guest partitions running on Hyper-V.

Hyper-V allows administrators to backup or restore the FreeBSD guest partition. Administrators can use Windows Powershell scripts to backup or restore the FreeBSD VM.

The hv_vss_daemon accepts file system freeze and thaw requests from the hv_utils(4) driver and performs the actual file-system operation.

The file system freeze and thaw functionality is useful when the Hyper-V host wants to do live backup of FreeBSD guest. Hyper-V host sends file system freezing request to hv_vss_daemon which conducts the real operation. After successfully freezing file system, Hyper-V host takes a snapshot of the VM. In the future, Hyper-V host can restore the FreeBSD VM through that snapshot.

The options are as follows:

-d

Run as regular process instead of a daemon for debugging purpose.

-n

Generate debugging output.

“	Do you laugh when the waiter drops a tray full of dishes? Unix weenies do. They're the first ones to laugh at hapless users, trying to figure out an error message that doesn't have anything to do with what they just typed.	”
— The Unix Haters' handbook

Manual Pages — HV_VSS_DAEMON

NAME

CONTENTS

SYNOPSIS

DESCRIPTION

SEE ALSO

HISTORY

AUTHORS

-d
	Run as regular process instead of a daemon for debugging purpose.
-n
	Generate debugging output.