Networker

Re: [Networker] Why isnt this browsable?

2012-04-02 16:16:53
Subject: Re: [Networker] Why isnt this browsable?
From: George Sinclair <george.sinclair AT NOAA DOT GOV>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Mon, 2 Apr 2012 16:16:30 -0400
On 2012-04-02 15:21, Michael Leone wrote:
Is it possible that your operation from last week hasn't actually
finished yet so it hasn't written anything to disk?
No, it has definitely finished. The command returned to a system prompt.

The first thing you tried (unintentionally since you meant to specify
-'i') was '-m' and then the nsrck -L7 command, right? This is exactly
what the man page suggests. But the last sentence in the man page has me
confused wherein it says: "However, if you have tapes for which there
are no index backups, then you will need to use the -i option to
reconstruct the index entries." Don't you have a backup of the index?
It is on the tape, with the saveset I wanted.

If  so, why would you need to use the 'i' option?
Nsrck -L7 did *not* work, as it claimed that no index entries existed for
that client (which was true). I've since been advised that I could
have/should have? Used "nsrck -L6", and not "-L7".

Why would the '-m',
followed by the 'nsrck -L7' not have worked, at least logically? We know
it didn't, but is this expected given your scenario? Why is the '-i'
necessary in this case? Just asking. I don't know.
Beats me. :-) I know that I usually do "scanner -m", then an mminfo to
determine what order the tape(s) were written, and then "scanner -i", in
that order. I've been told (I believe by EMC Tech Support) that you *must*
run "scanner -i" in the order shown by the mminfo, else the index is not
properly rebuilt. And *I thought* that "nsrck -L6 (or -L7)" wouldn't work
to re-read an index made by some other NW server; that in the case of
using tapes from a "foreign" NW server, you have to use "scanner -i", and
not "nsrck -L6/-L7".

Perhaps that is wrong, and "nsrck -L6" would work ... not sure how, as the
system would need to have "scanner -m" on an index saveset, so it knows
what tape the index is on ...

My understanding is that you should be able to use 'scanner -m' to rebuild the media database entry for the saveset (in this case D:\) and then also for the CFI save set. Next, you should be able to use 'nsrck -L7 -t date' to recover the index information. But if you don't have the index save set on tape or you don't have the tape then you would need to rebuild the index entries using 'scanner -i'. So if you were in that situation then you'd just start with 'scanner -i', obviating the need to use 'scanner -m' as a second or previous command. But you did have the CFI save set on tape, but 'nsrck -L7' didn't work for you. I think there is an issue when recovering indexes backed up on another server. I ran into this one time before. See my post: "Re: [Networker] nsrck -L7 error - help?" from 2010-03-16. It may have been similar to your problem. It's an annoying problem that shouldn't exist. The software should be able to work around it.

I don't see how 'nsrck -L6' would help, though? That doesn't recover an index. It's just the highest level of checking (1-6). You can't check it until you've recovered it. I mean, you have to have an index to check first, and your index was initially empty, following your re-creation of the NSR client resource, right?

BTW Is it necessary to check the index (nsrck -L6 or lower) after you rebuilt it (scanner -i) or after you recover it (nsrck -L7, assuming that had worked)?

George

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--
George Sinclair
Voice: (301) 713-3284 x210
- The preceding message is personal and does not reflect any official or 
unofficial position of the United States Department of Commerce -
- Any opinions expressed in this message are NOT those of the US Govt. -

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