10 More Discussions You Might Find Interesting
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Hello,
Please, I have a little problem, I hope you propose a solution. Thank you very much.
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Hello ;
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3. IP Networking
Hello,
I work with Freepastry API (overlay: pastry)
I would like someone to explain me this situation
I have a machine A: ip = @ 196.205.x.y
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-> I run freepastry it work on this @
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5. UNIX for Dummies Questions & Answers
I am setting up a test system and grabbed the /etc/vfstab file from the prod system. I don't want to overlay the /etc/vfstab file from the prod box on the test box so I just copied the prod /etc/vfstab file over to the test server and put the file in the /tmp/ directory.
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6. Solaris
Hi Everyone,
How to find the wrong entry in etc/vfstab or wrong mount point in etc/vfstab ?
Thanks & Regards
Padmaja. (4 Replies)
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7. UNIX and Linux Applications
Hi,
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8. Solaris
In the end of /etc/vfstab file :
/dev/md/dsk/d30 /dev/md/dsk/d30 /odb0 ufs no no -
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Also they don't mount after comand mount -a
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Hi, guys !
Could someone clarify one thing for me:
I start machine from disk0, and want to check the /etc/vfstab on disk1. How do i do it ?
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cd /
mount /dev/dsk/c0t1d0s0 /mnt
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10. UNIX for Dummies Questions & Answers
If i wish to make a mount permanent, is it /etc/vfstab that i have to the entry add to? If so does anybody know the syntax, ie. is it tab or space delimited ? etc etc
any help would be greatly appreciated (3 Replies)
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lofs(7FS) File Systems lofs(7FS)
NAME
lofs - loopback virtual file system
SYNOPSIS
#include <sys/param.h>
#include <sys/mount.h>
int mount (const char* dir, const char* virtual, int mflag, lofs, NULL, 0);
DESCRIPTION
The loopback file system device allows new, virtual file systems to be created, which provide access to existing files using alternate
pathnames. Once the virtual file system is created, other file systems can be mounted within it, without affecting the original file sys-
tem. However, file systems which are subsequently mounted onto the original file system are visible to the virtual file system, unless or
until the corresponding mount point in the virtual file system is covered by a file system mounted there.
virtual is the mount point for the virtual file system. dir is the pathname of the existing file system. mflag specifies the mount options;
the MS_DATA bit in mflag must be set. If the MS_RDONLY bit in mflag is not set, accesses to the loop back file system are the same as
for the underlying file system. Otherwise, all accesses in the loopback file system will be read-only. All other mount(2) options are
inherited from the underlying file systems.
A loopback mount of '/' onto /tmp/newroot allows the entire file system hierarchy to appear as if it were duplicated under /tmp/newroot,
including any file systems mounted from remote NFS servers. All files would then be accessible either from a pathname relative to '/' or
from a pathname relative to /tmp/newroot until such time as a file system is mounted in /tmp/newroot, or any of its subdirectories.
Loopback mounts of '/' can be performed in conjunction with the chroot(2) system call, to provide a complete virtual file system to a
process or family of processes.
Recursive traversal of loopback mount points is not allowed. After the loopback mount of /tmp/newroot, the file /tmp/newroot/tmp/newroot
does not contain yet another file system hierarchy; rather, it appears just as /tmp/newroot did before the loopback mount was performed
(for example, as an empty directory).
Examples
lofs file systems are mounted using:
mount -F lofs /tmp /mnt
SEE ALSO
lofiadm(1M), mount(1M), chroot(2), mount(2), sysfs(2), vfstab(4), lofi(7D)
NOTES
All access to entries in lofs mounted file systems map to their underlying file system. If a mount point is made available in multiple
locations via lofs and is busy in any of those locations, an attempt to mount a file system at that mount point fails unless the overlay
flag is specified. See mount(1M). Examples of a mount point being busy within a lofs mount include having a file system mounted on it or it
being a processes' current working directory.
WARNINGS
Because of the potential for confusing users and applications, you should use loopback mounts with care. A loopback mount entry in
/etc/vfstab must be placed after the mount points of both directories it depends on. This is most easily accomplished by making the loop-
back mount entry the last in /etc/vfstab.
SunOS 5.11 10 Apr 2001 lofs(7FS)
