11-14-2006
# lsvg rootvg
VOLUME GROUP: rootvg VG IDENTIFIER: 000cec8e00004c00000001042ce983d7
VG STATE: active PP SIZE: 64 megabyte(s)
VG PERMISSION: read/write TOTAL PPs: 542 (34688 megabytes)
MAX LVs: 256 FREE PPs: 5 (320 megabytes)
LVs: 17 USED PPs: 537 (34368 megabytes)
OPEN LVs: 13 QUORUM: 2
TOTAL PVs: 1 VG DESCRIPTORS: 2
STALE PVs: 0 STALE PPs: 0
ACTIVE PVs: 1 AUTO ON: yes
MAX PPs per PV: 1016 MAX PVs: 32
LTG size: 128 kilobyte(s) AUTO SYNC: no
HOT SPARE: no BB POLICY: relocatable
# lsvg rootvg -l
rootvg:
LV NAME TYPE LPs PPs PVs LV STATE MOUNT POINT
hd5 boot 1 1 1 closed/syncd N/A
hd6 paging 64 64 1 open/syncd N/A
hd8 jfslog 1 1 1 open/syncd N/A
hd4 jfs 2 2 1 open/syncd /
hd2 jfs 24 24 1 open/syncd /usr
hd9var jfs 2 2 1 open/syncd /var
hd3 jfs 9 9 1 open/syncd /tmp
hd1 jfs 200 200 1 open/syncd /home
hd10opt jfs 1 1 1 open/syncd /opt
lv00 jfs 47 47 1 closed/syncd /ptf
loglv00 jfs2log 1 1 1 open/syncd N/A
fslv00 jfs2 48 48 1 open/syncd /bea
lvora jfs2 81 81 1 open/syncd /oracle
ptcl2_redo01 raw 8 8 1 closed/syncd N/A
ptcl2_redo02 raw 8 8 1 open/syncd N/A
ptcl2_redo03 raw 8 8 1 closed/syncd N/A
lvbill jfs2 32 32 1 open/syncd /bill
# df -m
Filesystem MB blocks Free %Used Iused %Iused Mounted on
/dev/hd4 128.00 92.93 28% 2018 4% /
/dev/hd2 1536.00 24.34 99% 31878 9% /usr
/dev/hd9var 128.00 12.62 91% 610 2% /var
/dev/hd3 576.00 481.65 17% 279 1% /tmp
/dev/hd1 3072.00 20.90 100% 15126 2% /home
/proc - - - - - /proc
/dev/hd10opt 64.00 28.31 56% 626 4% /opt
/dev/fslv00 3072.00 1208.51 61% 19071 7% /bea
/dev/lvora 5184.00 412.23 93% 16058 15% /oracle
/dev/lvoradata 37120.00 1488.08 96% 26 1% /oradata
/dev/lvbill 2048.00 1099.20 47% 3637 2% /bill
/dev/lvjfdata 29312.00 8252.37 72% 27601 2% /jfdata
# du -sm /home
878.23 /home
Last edited by system-admin; 11-14-2006 at 08:16 AM..
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LEARN ABOUT FREEBSD
mksnap_ffs
MKSNAP_FFS(8) BSD System Manager's Manual MKSNAP_FFS(8)
NAME
mksnap_ffs -- take a file system snapshot
SYNOPSIS
mksnap_ffs snapshot_name
DESCRIPTION
The mksnap_ffs utility creates a snapshot named snapshot_name.
The group ownership of the file is set to ``operator''; the owner of the file remains ``root''. The mode of the snapshot is set to be read-
able by the owner or members of the ``operator'' group.
EXAMPLES
Create a snapshot of /usr/home file system and mount the snapshot elsewhere:
mksnap_ffs /usr/home/snapshot
mdconfig -a -t vnode -o readonly -f /usr/home/snapshot
mount -o ro /dev/md0 /mnt/
SEE ALSO
chmod(2), chown(8), mdconfig(8), mount(8)
HISTORY
The mksnap_ffs utility first appeared in FreeBSD 5.0.
CAVEATS
The disk full situation is not handled gracefully and may lead to a system panic when no free blocks are found.
Every filesystem can have only up to 20 active snapshots. When this limit is reached, attempting to create more snapshots fails with ENOSPC,
and mksnap_ffs reports that it is ``out of space''.
BSD
February 14, 2011 BSD