Lines Matching +full:set +full:- +full:top

67 utility is used to track changes to a read-only disk on a writable disk.
68 Logically, a writable disk is placed over a read-only disk.
71 on the top (writable disk) and if found are returned.
72 If they have not been written on the top disk,
87 on the top disk be written to the lower disk.
102 If the top disk is about 2.5 percent larger for 512 byte sector disks
115 If long-term persistance is desired,
119 is written to the top device.
124 .Bl -tag -width "destroy"
127 The first device given is used as the top device and must be writable.
129 The second device may be mounted read-only but it is recommended
132 .Pa /dev/ Ns Ao Ar upperdev Ac Ns - Ns Ao Ar lowerdev Ac Ns Pa .union .
141 .Bl -tag -width "-Z gunionname"
168 .Bl -tag -width "-f"
175 Discard all the changes made in the top layer thus reverting to the
181 Write all the changes made in the top device to the lower device
185 .Bl -tag -width "-f"
195 flag may be specified to allow the lower device to be mounted read-only.
196 To prevent a filesystem panic on the mounted lower-device filesystem,
199 operation finishes the lower-device filesystem should be unmounted
201 If the lower-device filesystem is currently being used as the root
235 as the read-only disk on the bottom and
237 as the wriable disk on the top.
238 .Bd -literal -offset indent
239 gunion create -v md0 da0p1
240 mount /dev/md0-da0p1.union /mnt
245 .Bd -literal -offset indent
247 gunion commit -v md0-da0p1.union
251 .Bd -literal -offset indent
253 gunion revert -v md0-da0p1.union
257 .Bd -literal -offset indent
259 gunion destroy -v md0-da0p1.union
268 .Pa md0-da0.union
270 .Pa md0-da0p1.union ,
271 .Pa md0-da0p2.union ,
274 .Pa md0-da0.union
285 .Bd -literal -offset indent
287 newfs /dev/md0-da0p1.union
297 .Bl -tag -width indent
302 This can be set to a number between 0 and 4 inclusive.
303 If set to 0, no debug information is printed.
304 If set to 1, all the verbose messages are logged.
305 If set to 2, addition error-related information is logged.
306 If set to 3, mapping operations are logged.
307 If set to 4, the maximum amount of debug information is printed.