03-05-2003
Since you are using ufs I doubt you are using any type of volume manager like veritas. The one thing you need to be aware of is that the device may have changed between systems depending on the controller you attached it to. For example, on system1 it may have been c0t1d1 but on system2 it could be c1t1d1 or something else. You just need to be aware of this when you try to mount it on system2.
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LEARN ABOUT FREEBSD
sbread
SBREAD(3) BSD Library Functions Manual SBREAD(3)
NAME
sbread, sbwrite -- read and write superblocks of a UFS file system
LIBRARY
UFS File System Access Library (libufs, -lufs)
SYNOPSIS
#include <sys/param.h>
#include <sys/mount.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <libufs.h>
int
sbread(struct uufsd *disk);
int
sbwrite(struct uufsd *disk, int all);
DESCRIPTION
The sbread() and sbwrite() functions provide superblock reads and writes for libufs(3) consumers. The sbread() and sbwrite() functions oper-
ate on the superblock field, d_sb, associated with a given userland UFS disk structure. Additionally, the sbwrite() function will write to
all superblock locations if the all value is non-zero.
RETURN VALUES
The sbread() and sbwrite() functions return the value 0 if successful; otherwise the value -1 is returned and the global variable errno is
set to indicate the error.
ERRORS
The function sbread() may fail and set errno for any of the errors specified for the library function bread(3). Additionally, it may follow
the libufs(3) error methodologies in situations where no usable superblock could be found.
The function sbwrite() may fail and set errno for any of the errors specified for the library function bwrite(3).
SEE ALSO
bread(3), bwrite(3), libufs(3)
HISTORY
These functions first appeared as part of libufs(3) in FreeBSD 5.0.
AUTHORS
Juli Mallett <jmallett@FreeBSD.org>
BSD
June 4, 2003 BSD