Networker

Re: [Networker] Legato Server on Linux

2005-06-27 16:15:48
Subject: Re: [Networker] Legato Server on Linux
From: Jon Fraley <jfraley AT CLASSMAILBOX DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Mon, 27 Jun 2005 16:14:21 -0400
We have a similar configuration Networker 7.1.3 Red Hat ES3  on ADIC
Scalar i2000 LTO-2 drives.  We do not have the /etc/st.conf file and are
only experiencing issues recovering an Exchange DB. All other recoveries
are fine.

Jon

On Mon, 2005-06-27 at 15:29 -0400, Librado Pamintuan wrote:
> Good afternoon George,
> 
> We are currently experiencing restore problems with the message 'cannot
> read record'could this be caused by not having the /etc/st.conf file?
> 
> We are currently on Legato v7.1.3 on Red HAT ES3 and using an ADIC Scalar
> 100 with 2x LTO-2 tape drives.
> 
> I found a solution from Legato web support, but not sure if it's the same
> content at its configured for SDLT.
> 
> thanks in advance,
> Librado
> 
> 
> On Mon, 10 Mar 2003 12:04:16 -0500, George Sinclair
> <George.Sinclair AT NOAA DOT GOV> wrote:
> 
> >We are running a Storagetek L80 LTO tape library under Redhat Linux. We
> >have learned the following two painful lessons:
> >
> >1. Make certain you have a proper /etc/st.conf file. Failure to
> >configure this file properly or not having one at all will make life
> >very uncomfortable for you when you go to recover data. You will see
> >"tape positioning by record disabled" messages, and NetWorker will take
> >forever to get itself to the right spot on the tape to begin the
> >recover. So, for example, a recover that might take one hour to get the
> >data and maybe 1 minute to get to the right spot to begin the recover
> >will now take one hour to get to the right spot plus another hour or so
> >to recover the data. We also observed extremely slow recover times once
> >the recovery actually started. So learn the easy way and set up the
> >st.conf file before you start any backups.
> >
> >2. Make certain you have the right SCSI cables. There is no way to just
> >look at a SCSI cable and know for certain that it's the right type. Case
> >in point, we had what we were told were LVD cables. They plugged in just
> >dandy and had all the right connectors, but in time, we started
> >experiencing a lot of SCSI problems. It got to the point where every
> >morning I would come in to find one of two type of error messages
> >appearing on a given LTO device: "read open error: Invalid argument", or
> >"read open error device or resource busy". These cables looked perfectly
> >fine. They had only one part number located on them, no other wording or
> >print. It turns out that Storagetek had given us the wrong cables!!!!!
> >They replaced them, including the cables on the library, not just those
> >going to the server. I should note that the cables that were replaced on
> >just the library are now flat ribbon cables, not round cables. The new
> >ones connecting the library to the server are round ones, just like
> >before, but they have wording printed on them, but nothing about LVD.
> >Anyway, after replacing these cables  our problems went away. The moral
> >of the story is that you can use the wrong cables and still have
> >everything run just fine for a while, BUT sooner or later, you will
> >start to see errors. So don't think that just because you're not seeing
> >errors that you have the right type of cables. Check the part numbers!
> >
> >One thing I don't like about the L80 is the fact that they offer no way
> >to move tapes around in the library without opening the door or using
> >your backup software. The problem, of course, is that you can't use
> >NetWorker to move a tape into a drive without mounting it. So, if we're
> >having problems, and I want to do some testing using something like 'mt'
> >or 'tar' or some such thing, and I want to load a non-NetWorker (blank)
> >tape into the drive, I can't mount it using NetWorker. I have to open
> >the frikin' door up! Now you can buy a package that apparently runs over
> >the WEB and uses the ip address of the library, and it's sold by
> >Storagetek, but I think it's ridiculous t hat they don't build the
> >capability into the GUI panel on the front like Quauntum/ATL does with
> >their P1000 libraries. Now I have to go and buy some software package to
> >do that. Sheesh! When I called Storagetek about this they asked me why I
> >would ever want move tapes around! Unbelievable. The other thing that
> >seals the fat on these libraries is that they don't show you the tapes
> >that are in the slots via the GUI panel. Our Quantum/ATL libraries will
> >show you on the GUI each tape that's loaded in a slot. IT will show you
> >the bar code, and if the tape doesn't have a barcode it will indicate
> >that. The L80 shows nothing. You have to look through this narrow window
> >into the box and physically eyeball the slots. Of course, it's dark in
> >there. The least they could have done is put a light in there. I score
> >these guys a D- on product convenience, at least on their lower end
> >libraries, anyway. The higher end libraries may come with these features
> >built-in. I guess their attitude was that they wanted to keep the GUI
> >simple and leave all the advanced features to ancillary software via a
> >WEB browser. I guess there's a WEB server built in that would allow
> >connections via IP address of the library. Not sure. Haven't looked into
> >it.
> >
> >As far as Solaris to Linux is concerned, I think the problem is that one
> >OS is little Endian and the other is Big endian, and that could mean
> >problems for the indexes when they're copied over. I've had at least one
> >person tell me this. We need to do the same thing, though, since our
> >primary server is on Solaris and we'd like to move it to Redhat Linux.
> >
> >George
> >
> >
> >WE, too, are running our primary server on a Sun and would like to
> >switch it to Linux, but I don't recall the hangup with this. I think the
> >indexes are little endian versus big endian, and t hat could be a
> >problem
> >
> >
> >
> >
> >Matt Hemingway wrote:
> >>
> >> Hi all,
> >>
> >> Just wondering if anybody has any experience migrating Networker Server
> running on a Solaris 8 box to a Linux box?
> >>
> >> Also, if anybody has any experience with a StorageTek tape library
> running on Linux that would be helpfull as well.
> >>
> >> Thanks!
> >>
> >> -Matt
> >>
> >> --
> >> ================
> >> Matt Hemingway
> >> PCNAlert
> >> www.pcnalert.com
> >> 626-585-2788
> >> ================
> >>
> >> --
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