1 .\" Copyright (c) 2007 The DragonFly Project. All rights reserved.
3 .\" This code is derived from software contributed to The DragonFly Project
4 .\" by Matthew Dillon <dillon@backplane.com>
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33 .\" $DragonFly: src/sbin/mount_hammer/mount_hammer.8,v 1.9 2008/07/03 06:36:27 dillon Exp $
39 .Nd mount a HAMMER file system
42 .Op Fl o Ar mount-options
43 .Op Fl T Ar transactionid
48 .Op Fl o Ar mount-options
53 utility mounts a HAMMER filesystem backed by one or more block devices.
55 The options are as follows:
56 .Bl -tag -width indent
57 .It Fl o Ar mount-options
58 Specify mount options, which are a comma delimited set of options (see
60 Supported mount options are:
61 .Bl -tag -width indent
63 Issue a read-only mount.
65 Put the entire filesystem in no-history mode. Change history is not
67 Use of this option may increase the overhead of doing mirroring.
68 This option is generally only used in an emergency.
70 .It Fl T Ar transactionid
71 Mount the filesystem as-of a particular
73 The mount will automatically be made read-only.
76 must be specified as a 64 bit hex value prefixed with "0x".
78 Update the mount point. This is typically used to upgrade a mount to
79 read-write or downgrade it to read-only.
82 Note that issuing a read-only mount which requires UNDOs to be run will
83 still run the UNDOs, but will not flush the buffer cache buffers until/if
84 the mount is updated to read-write.
86 .Bd -literal -offset indent
87 mount_hammer -o ro,noatime /dev/ad0s1d /dev/ad1s1d /mnt
90 Mount a hammer filesystem made up of two volumes onto
93 Exit status is 0 on success and 1 on error.
102 utility first appeared in
105 .An Matthew Dillon Aq dillon@backplane.com