ufsdump for root partition
 

hi,

i executed two ufsdump commands as follows. As you can see, the difference of these commands is just a -(dash) character. I cloured the dash with red.

The first command taked the dump of the /dev/rfssnap/1 device and the second command taked the ufsdump of the /dev/rdsk/c1t0d0s0 device.

Could someone give me any idea what is excatly doing this dash character with ufsdump command. Which one is a correct dump way for /(root) partition.


httpdb# ufsdump 0ufN /oradata/sil2sil /dev/rdsk/c1t0d0s0 /dev/rfssnap/1
DUMP: Date of this level 0 dump: Thu 06 Dec 2007 01:09:32 PM EET
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rfssnap/1 to /oradata/sil2sil.
DUMP: Mapping (Pass I) [regular files]
DUMP: Mapping (Pass II) [directories]
DUMP: Writing 32 Kilobyte records
DUMP: Estimated 9050050 blocks (4418.97MB)
------------------------------------------

httpdb# ufsdump 0ufN /oradata/sil2sil2 - /dev/rdsk/c1t0d0s0 /dev/rfssnap/1
DUMP: Date of this level 0 dump: Thu 06 Dec 2007 01:10:55 PM EET
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rdsk/c1t0d0s0 (httpdb:/) to /oradata/sil2sil2.
DUMP: Mapping (Pass I) [regular files]
DUMP: Mapping (Pass II) [directories]
DUMP: Writing 32 Kilobyte records


Thanks in advace,

The second syntax looks bogus to me.

You are using four options, 0ufN, two of which , f and N), require a parameter.

the f option got /oradata/sil2sil, this is the file to dump to instead of the default tape. Make sure you have enough space of the /oradata file system.
the N option is supposed to get the name of the device but "-" isn't exactly that.

As the second syntax has an extraneous parameter, the dump is done on the live file system instead of the snapshot, which may create an unusable backup.