Hi,
I have tape that has some Oracle (RMAN) save sets on it created using
NMO. It also has some flat file backups of some Oracle log files and
some client indexes. I just wanted to test to see if I could read a save
set on the tape, low level, to test the integrity of the tape. I already
have a clone of it, which I guess is a valid enough test without
actually recovering it from RMAN, but I decided to try scanner just for
laughs.
Running scanner without actually recovering the data works fine, and
everything is reported - no errors, even when running with '-p' and '-v'
options. Recovering regular flat file backups, and even a client index
was also successful, but I get the following error when I try to recover
an actual save set that used NMO:
scanner -s server -f 333 -S 492892121 /dev/nst0 -x uasm -rv
8909:scanner: using 'rd=proust:/dev/nst0' as the device name
8936:scanner: scanning LTO Ultrium-4 tape ORA001L4 on rd=proust:/dev/nst0
c-171345260-20110902-00
4669:uasm: xdr bytes failed -- bad save stream
8767:scanner: write failed, Broken pipe
29485:scanner: ssid 492892121: scan complete
8786:scanner: ssid 492892121: 10 MB, 1 file(s)
It created a zero length file named c-171345260-20110902-00. The name in
the media database is: RMAN:c-171345260-20110902-00, and it's 10 MB.
Obviously, you can't recover Oracle save sets using save set recover.
These have to be recovered using RMAN. Yes, I knew that, and ditto with
a browseable recovery - again, RMAN is required - but I was thinking
that maybe scanner might be able to read the data off to disk since
NetWorker wrote it to tape to begin with, right? Anyway, I wasn't
expecting to be able to actually do anything with the recovered data,
since that requires RMAN, but thought maybe, just maybe scanner might
pull it off the tape anyway?
Is the error message surprising? Is this what one would expect to see?
Thanks.
George
--
George Sinclair
Voice: (301) 713-3284 x210
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