On Sun, Jan 11, 2009 at 11:40 AM, Marvin Wang, Min <mail...@yahoo.com> wrote:
> sorry, my question might be misleading, I mean the starting datablock of a
> file
"starting" is somewhat misleading, since zfs will allocate a new block
whenever a block is updated, so the physical blocks for a file is not
necessarily adjacent.
zdb -ddddd POOL_NAME/FS_NAME
shows something like this
Object lvl iblk dblk lsize asize type
5 1 16K 52.5K 52.5K 52.5K ZFS plain file
264 bonus ZFS znode
path /XP/Logs/VBox.log.2
uid 1000
gid 120
atime Tue Nov 25 14:50:45 2008
mtime Tue Nov 25 16:54:11 2008
ctime Tue Dec 23 15:16:36 2008
crtime Tue Nov 25 14:50:45 2008
gen 8419852
mode 100600
size 53438
parent 14
links 1
xattr 0
rdev 0x0000000000000000
Indirect blocks:
0 L0 0:f53165800:d200 d200L/d200P F=1 B=8421332
segment [0000000000000000, 000000000000d200) size 52.5K
I assume this is what you want (see Indirect blocks list)?
See http://www.cuddletech.com/blog/pivot/entry.php?id=980 for details.
Regards,
Fajar
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