X-Git-Url: https://git.wh0rd.org/?p=dump.git;a=blobdiff_plain;f=dump%2Fdump.8.in;h=1cc17231e49bcf5bc8068227f9732f070f59d697;hp=555b7ac6cd63da96e3bea1f04eec01f650c56f72;hb=f39dae9975f9d3480f18eed5c7660e38fe332a97;hpb=1753ce6722c4acbc6afb049672da6ca4c28207b3

diff --git a/dump/dump.8.in b/dump/dump.8.in
index 555b7ac..1cc1723 100644
--- a/dump/dump.8.in
+++ b/dump/dump.8.in
@@ -26,7 +26,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$Id: dump.8.in,v 1.58 2005/06/01 13:44:35 stelian Exp $
+.\"	$Id: dump.8.in,v 1.61 2009/06/18 09:36:52 stelian Exp $
 .\"
 .TH DUMP 8 "version __VERSION__ of __DATE__" BSD "System management commands"
 .SH NAME
@@ -87,14 +87,15 @@ The following options are supported by
 .B dump:
 .TP
 .BI \-level#
-The dump level (any integer). A level 0, full backup, guarantees the
-entire file system is copied (but see also the
+The dump level (any integer). A level 0, full backup, specified by
+.B \-0
+guarantees the entire file system is copied (but see also the
 .B \-h
 option below). A level number above 0, incremental backup, tells
 .B dump
 to
 copy all files new or modified since the last dump of a lower level. The 
-default level is 9. Historically only levels 0 to 9 were usable in
+default level is 0. Historically only levels 0 to 9 were usable in
 dump, this version is able to understand any integer as a dump level.
 .TP
 .BI \-a 
@@ -520,8 +521,8 @@ Always start with a level 0 backup, for example:
 This should be done at set intervals, say once a month or once every two months,
 and on a set of fresh tapes that is saved forever.
 .IP \(em
-After a level 0, dumps of active file systems are taken on a daily basis, using
-a modified Tower of Hanoi algorithm, with this sequence of dump levels:
+After a level 0, dumps of active file systems are taken on a daily basis,
+with this sequence of dump levels:
 .RS 14
 .B 3 2 5 4 7 6 9 8 9 9 ...
 .RE
@@ -534,6 +535,12 @@ set of tapes per dumped file system is used, also on a cyclical basis.
 After several months or so, the daily and weekly tapes should get rotated out
 of the dump cycle and fresh tapes brought in.
 .PP
+Another backup strategy is the Tower of Hanoi sequence, which reuses
+older tapes in a way that for newer dates the available restore points
+are more frequent, then for older dates (see
+http://en.wikipedia.org/wiki/Backup_rotation_scheme for additional
+information).
+.PP
 (The 4.3BSD option syntax is implemented for backward compatibility but is not
 documented here.)
 .SH ENVIRONMENT