07-10-2001
ufsdump...
hi.
it`s no problem to make an ufs-dump to a mounted filesystem, but the meaning is this: if you want a "consistent" state of datas, no process have to write to a file you wanna back up; so when you are really shure NO process is writing to the datas you want to back up, you can run "ufs-dump" unmounted. (check if there are processes with "fuser <dir>" or freeware "lsof").
when you are not shure, go to single-user mode to "kick" all user-processes from the system. but when you wanna be really shure, umount the filesystems to backup, cause there are always systemprocesses writing to filesystems like /var.
best regards,
alex...
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello all,
I was wondering is it possible to install Solaris over the network whit jumpstart and just ufsretore a dump file? The clinet's disk would totally be empty. I know that I can use the rules files, would I put the command to uferestore from the server in the pre install rules file. I... (0 Replies)
Discussion started by: larryase
0 Replies
2. UNIX for Dummies Questions & Answers
hi
i would like to backup my OS
what is the exact command to do?
beside backup to tapes can i back up to a directory in another server?
will the command be the same?
thanks. :confused: (4 Replies)
Discussion started by: legato
4 Replies
3. Solaris
Hi,
I want to how to take backup of File system From Disk to Disk using ufsdump?
Wheather we can take the backup of root file system from one disk to another if tape drive is not available? wheather it is reliable to restore root file system? (2 Replies)
Discussion started by: manoj.solaris
2 Replies
4. UNIX for Dummies Questions & Answers
I ran this dump (as root) and got the following.............
# ufsdump 0f /dev/rmt/0n /
DUMP: Writing 32 Kilobyte records
DUMP: Date of this level 0 dump: Tue 11 Dec 2007 06:07:35 AM PST
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rdsk/c2t1d0s0 (gambler:/) to... (1 Reply)
Discussion started by: shorty
1 Replies
5. UNIX for Advanced & Expert Users
I just completed a level 0 ufsdump of the following files:-
ufsdump 0uf /dev/rmt/0n /
ufsdump 0uf /dev/rmt/0n /usr
ufsdump 0uf /dev/rmt/0n /export/home
ufsdump 0uf /dev/rmt/0n /oracle
ufsdump 0uf /dev/rmt/0n /sapr3
I need to restore ALL the files onto a different machine and continue... (1 Reply)
Discussion started by: charleywasharo
1 Replies
6. Solaris
HI Gurus,
I have a sunfire V445 server running SAP ECC 6.0 with an Oracle database on Solaris 9 (SunOS 5.9). I recently completed a ufsdump to tape of the following files:-
/,
/usr,
/oracle,
/export,
/sapr3,
I want to restore these files from tape onto a different server of the same... (5 Replies)
Discussion started by: charleywasharo
5 Replies
7. UNIX for Dummies Questions & Answers
Hi,
I have 5 soraris boxes and i am trying to backup all to SAN.Which backup is more suitable tar or ufsdump? Also pls mention what are the important folders i need to back up.
Thanks (3 Replies)
Discussion started by: solaris5.10
3 Replies
8. UNIX for Dummies Questions & Answers
People i have 2 sun sparc solaris 10.
I have one filesystem to 98% and i need to do a ufsdump of that filesystem.
THe problem is that i don't have space to allocate the dump of the filesystem.
Thats why i want to do it from the other sun and bring the ufs dump to de /FREE filesystem.
... (4 Replies)
Discussion started by: enkei17
4 Replies
9. Solaris
Experts,
Before patching am advised to take backup :
so am going with:
ufsdump -0uf /dev/rmt0 / ---> to take the whole / bkp to tape.
some servers have /var in diff slice, In this case whether i need to take backup of /var also in tape?
ufsdump -ouf /dev/rmt0 /var ---> to take... (3 Replies)
Discussion started by: fizan
3 Replies
10. Solaris
Hi all,
I have a Solaris 10 running on a M4000.
I wanted to migrate it to M10
q1) can I do a ufsdump on / in the m4000 and restore it on the m10 ?
q2) how do we ufsrestore on the naked M10 without any OS being install/running in the 1st place ?
q3) if the answer to the... (5 Replies)
Discussion started by: javanoob
5 Replies
UMOUNT(8) Linux Programmer's Manual UMOUNT(8)
NAME
umount - unmount file systems
SYNOPSIS
umount [-hV]
umount -a [-dflnrv] [-t vfstype] [-O options]
umount [-dflnrv] {dir|device}...
DESCRIPTION
The umount command detaches the file system(s) mentioned from the file hierarchy. A file system is specified by giving the directory where
it has been mounted. Giving the special device on which the file system lives may also work, but is obsolete, mainly because it will fail
in case this device was mounted on more than one directory.
Note that a file system cannot be unmounted when it is `busy' - for example, when there are open files on it, or when some process has its
working directory there, or when a swap file on it is in use. The offending process could even be umount itself - it opens libc, and libc
in its turn may open for example locale files. A lazy unmount avoids this problem.
Options for the umount command:
-V Print version and exit.
-h Print help message and exit.
-v Verbose mode.
-n Unmount without writing in /etc/mtab.
-r In case unmounting fails, try to remount read-only.
-d In case the unmounted device was a loop device, also free this loop device.
-i Don't call the /sbin/umount.<filesystem> helper even if it exists. By default /sbin/umount.<filesystem> helper is called if one
exists.
-a All of the file systems described in /etc/mtab are unmounted. (With umount version 2.7 and later: the proc filesystem is not
unmounted.)
-t vfstype
Indicate that the actions should only be taken on file systems of the specified type. More than one type may be specified in a
comma separated list. The list of file system types can be prefixed with no to specify the file system types on which no action
should be taken.
-O options
Indicate that the actions should only be taken on file systems with the specified options in /etc/fstab. More than one option type
may be specified in a comma separated list. Each option can be prefixed with no to specify options for which no action should be
taken.
-f Force unmount (in case of an unreachable NFS system). (Requires kernel 2.1.116 or later.)
-l Lazy unmount. Detach the filesystem from the filesystem hierarchy now, and cleanup all references to the filesystem as soon as it is
not busy anymore. (Requires kernel 2.4.11 or later.)
--no-canonicalize
Don't canonicalize paths. For more details about this option see the mount(8) man page.
--fake Causes everything to be done except for the actual system call; this ``fakes'' unmounting the filesystem. It can be used to remove
entries from /etc/mtab that were unmounted earlier with the -n option.
THE LOOP DEVICE
The umount command will free the loop device (if any) associated with the mount, in case it finds the option `loop=...' in /etc/mtab, or
when the -d option was given. Any pending loop devices can be freed using `losetup -d', see losetup(8).
NOTES
The syntax of external umount helpers is:
/sbin/umount.<suffix> {dir|device} [-nlfvr] [-t type.subtype]
where the <suffix> is filesystem type or a value from "uhelper=" mtab option. The -t option is used for filesystems with subtypes support
(for example /sbin/mount.fuse -t fuse.sshfs).
The uhelper (unprivileged umount helper) is possible to used when non-root user wants to umount a mountpoint which is not defined in the
/etc/fstab file (e.g devices mounted by HAL).
FILES
/etc/mtab table of mounted file systems
SEE ALSO
umount(2), mount(8), losetup(8).
HISTORY
A umount command appeared in Version 6 AT&T UNIX.
AVAILABILITY
The umount command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
Linux 2.0 26 July 1997 UMOUNT(8)