Author: George Sinclair <George.Sinclair AT NOAA DOT GOV>
Date: Thu, 6 May 2004 11:22:14 -0400
What exactly is NetWorker doing when auto media verify is enabled? Does it make sense to have this enabled for a clone pool? I have a pool that I do enable this for because it sounded like it might p
First the man page definition... auto media verify (read/write, yes/no, choice) If set to yes, NetWorker verifies data written to volumes from this pool. Data is verified by repositioning the volume
Author: "Maarten Boot (CWEU-USERS/CWNL)" <Maarten.Boot AT NL.COMPUWARE DOT COM>
Date: Thu, 6 May 2004 18:19:24 +0200
The interesting quiestion is 'why is it not on by default' and why can you not set it on on the Default Pool, how silly of them Maarten -- Note: To sign off this list, send a "signoff networker" comm
The same can be said about the view-details feature in nwadmin and the hidden options in the admin Windows GUI. Why have hidden options at all? I guess its simply a matter of a design choice, a poor
My assumption is backward compatibility. I believe that earlier versions didn't have the option at all, so when it was added it was added off as default. Same reason you can't change anything else o
Author: Davina Treiber <Treiber AT HOTPOP DOT COM>
Date: Thu, 6 May 2004 19:25:46 +0100
Hmmm, probably looks better to squeeze out that extra bit of performance. and why can you not set it on on the Default Pool, how silly of them I think it's silly too that you can't change any of the
not In my opinion, anyone who frequently uses the default pool, hasn't configured networker properly, since you can't change the default pool. //Oscar -- Note: To sign off this list, send a "signoff
Author: Steve Rader <rader AT GINSENG.HEP.WISC DOT EDU>
Date: Fri, 7 May 2004 06:57:55 -0500
Ahh, does the default pool have some stupid settings?? I've been using NetWorker's default pool for 12-13 years now, and I'm quite certain I have NetWorker configured properly. steve - - - systems &
Yes, for many people it does, such as not being able to use auto media verify for one thing. I suppose this is a site-specific issue, but I cannot imagine not using that feature so I use my own tape
Author: Steve Rader <rader AT GINSENG.HEP.WISC DOT EDU>
Date: Fri, 7 May 2004 07:14:04 -0500
Has the list/someone (ahem) verified that "auto media verify" on modern tape drives is necessary/desirable? I thought it was essientally a hack for ancient tape drives that over buffer at the end of
Author: "Maarten Boot (CWEU-USERS/CWNL)" <Maarten.Boot AT NL.COMPUWARE DOT COM>
Date: Fri, 7 May 2004 14:32:13 +0200
On my 7.1.1 server I switched 'ot' on yesterday, all reports now have a V added in front and surely not all savesets have hit the end of my tapes. So separate from end-of-tape , the suggestion that t
Author: Steve Rader <rader AT GINSENG.HEP.WISC DOT EDU>
Date: Fri, 7 May 2004 07:54:27 -0500
DLT (and most all modern tape technologies, IIRC) do "read after write", so DLT drives automatically verify that all the data they receive is written to tape. That leads me to think that auto media v
Maybe I am being a bit annal, but for me, the reason is that I want as much assurance that my backups are reliable as possible. The time added onto my nightly backup schedule to use auto media verify
end-of-tape is just one place where the verification occurs. It also happens when the tape becomes idle. % man nsr_pool [...] Media is verified whenever a volume becomes full while saving and it is
The question is, does DLT (or other technology) acknowledge the write before or after verifying the tape. If it's before the verification, then a situation could arise where the verification fails a
Author: Steve Rader <rader AT GINSENG.HEP.WISC DOT EDU>
Date: Fri, 7 May 2004 10:13:40 -0500
...doesn't this hypothesis imply that DLT drives are quite broken by design??? ...tf this understanding is true, then wouldn't the above hypothesis would be false?? Apologies for being especially or
Author: George Sinclair <George.Sinclair AT NOAA DOT GOV>
Date: Fri, 7 May 2004 11:27:49 -0400
Hard to believe all the threads that my original posting has produced. LOL! Sometimes you never know all the responses that will be generated. But, now that we've been on this subject of DLT drives,
Let me rephrase my statement, it was very unclear. The thing that I'll bet is that case is that the DLT unit will acknowledge data written to the buffer prior to writing it to the physical tape. I d
Author: Steve Rader <rader AT GINSENG.HEP.WISC DOT EDU>
Date: Fri, 7 May 2004 10:43:58 -0500
Try http://www.google.com/search?q=lto%20%22read%20after%20write%22 My point all along has been that I trust that there is no problem. I think it goes to common sense: if DLT (or LTO) tape drives ha
Steve, you're probably right. Hell, I don't even use DLT, I use AIT-2, but the principle's the same. This may not sound logical, but I sleep better at night, nowing I have the greatest amount of vali