diff options
Diffstat (limited to 'cddl/contrib/opensolaris/cmd/zfs/zfs.8')
| -rw-r--r-- | cddl/contrib/opensolaris/cmd/zfs/zfs.8 | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/cddl/contrib/opensolaris/cmd/zfs/zfs.8 b/cddl/contrib/opensolaris/cmd/zfs/zfs.8 index 8fac48a..d14ce13 100644 --- a/cddl/contrib/opensolaris/cmd/zfs/zfs.8 +++ b/cddl/contrib/opensolaris/cmd/zfs/zfs.8 @@ -30,7 +30,7 @@ .\" .\" $FreeBSD$ .\" -.Dd March 20, 2014 +.Dd April 5, 2014 .Dt ZFS 8 .Os .Sh NAME @@ -1306,6 +1306,38 @@ Consequently, writes to a sparse volume can fail with when the pool is low on space. For a sparse volume, changes to .Sy volsize are not reflected in the reservation. +.It Sy volmode Ns = Ns Cm default | geom | dev | none +This property specifies how volumes should be exposed to the OS. +Setting it to +.Sy geom +exposes volumes as +.Xr geom 4 +providers, providing maximal functionality. +Setting it to +.Sy dev +exposes volumes only as cdev device in devfs. +Such volumes can be accessed only as raw disk device files, i.e. they +can not be partitioned, mounted, participate in RAIDs, etc, but they +are faster, and in some use scenarios with untrusted consumer, such as +NAS or VM storage, can be more safe. +Volumes with property set to +.Sy none +are not exposed outside ZFS, but can be snapshoted, cloned, replicated, etc, +that can be suitable for backup purposes. +Value +.Sy default +means that volumes exposition is controlled by system-wide sysctl/tunable +.Va vfs.zfs.vol.mode , +where +.Sy geom , +.Sy dev +and +.Sy none +are encoded as 1, 2 and 3 respectively. +The default values is +.Sy geom . +This property can be changed any time, but so far it is processed only +during volume creation and pool import. .It Sy vscan Ns = Ns Cm off | on The .Sy vscan |
