https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209791
Bug ID: 209791
Summary: To tunefs utilities I added flag for generate new
ufsid (unique filesystem id).
Product: Base System
Version: 10.3-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: bin
Assignee: freebsd-bugs@FreeBSD.org
Reporter: pavelivol...@gmail.com
Created attachment 170723
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=170723&action=edit
Added G flag.
In the superblock of the filesystem present unique id:
/usr/include/ufs/ffs/fs.h
/*
* Super block for an FFS filesystem.
*/
struct fs {
...
int32_t fs_id[2]; /* unique filesystem id */
...
It's may by used to mount filesystem (/dev/ufsid/...).
After duplicating the disc, it is necessary to change it, to restore the
uniqueness drives.
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