Hi Frank,

If by "replace" you mean "physically replace", then don't look for that in the 
netwoker documentation. It won't cover that because that has nothing  to do 
with networker troubleshooting and/or administration.  

You should be able to find that in formation in the corresponding service 
(hardware) manuals.


jee



On Monday 08 November 2010 13:31:29 Francis Swasey wrote:
> Brian,
>
> Thanks for that pointer.  Sadly, it doesn't cover how to replace a failed
> tape drive in a library at all (at least there is not one single use of the
> word "replace" in the entire document).  I'll peruse it in depth later...
>
> Frank
>
> On 11/5/10 3:19 PM, Brian Narkinsky wrote:
> > You have to dig through PowerLink a bit to find this but there is a
> > pretty good paper on how to configure Tape Drives in Networker.  Lot of
> > good info in here.
> >
> > EMC® NetWorker®
> > Configuring Tape Devices for EMC NetWorker
> > Technical Note
> > P/N 300-008-352
> > REV A04
> >
> > On Fri, Nov 5, 2010 at 9:24 AM, Francis Swasey <Frank.Swasey AT uvm DOT 
> > edu> 
wrote:
> >> Have you tested what happens when a tape drive fails and you have to
> >> replace it with a new one
> >> (which has a different serial number) doing it that way?
> >>
> >> For those of us that created our jukebox back in the 7.2 (or earlier)
> >> days and have the jukebox
> >> defined using the rd=<storagenode>:/dev/nstX devices, I strongly urge
> >> you to consider coercing
> >> udev into picking which /dev/nstX device the drive is based on the
> >> serial number (then
> >> remembering to update that rule when you replace a drive).
> >>
> >> I have set it up as /etc/udev/rules.d/20-local.rules -- which is a copy
> >> of the 50-udev.rules
> >> file with a line added for each tape drive like:
> >>
> >> KERNEL=="nst[0-9]*", SUBSYSTEM=="scsi_tape",
> >> ENV{ID_SERIAL}=="3500507631203e5d4", NAME="nst0",
> >> SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SERIAL}-nst", SYMLINK+="tape0"
> >>
> >> just in front of the
> >>
> >> KERNEL=="nst[0-9]*", SUBSYSTEM=="scsi_tape", ENV{ID_SERIAL}=="?*",
> >> SYMLINK+="tape/by-id/$env{ID_BUS}-$env{ID_SERIAL}-nst"
> >>
> >> line.
> >>
> >> Why would I do something this convoluted?  Because I don't like the risk
> >> of having to perform a
> >> 25 hour jukebox inventory just because a tape drive failed and suddenly
> >> I have to re-define the
> >> jukebox because EMC's code messed up and can't figure out what happened
> >> to that tape drive that
> >> broke and was removed.
> >>
> >> Frank
> >>
> >> On 11/5/10 8:43 AM, Riku Valli wrote:
> >>> Matthew Huff wrote:
> >>>> I'm not sure you understand persistent binding. With persistent
> >>>> binding,
> >>
> >> no changes
> >>
> >>>> (including SCSI bus resets) will change the names (and therefore the
> >>
> >> drive order).
> >>
> >>> Yes, tape drives uses serialnumbers for devicenames at RHEL 5 for
> >>
> >> persistent bindings. So them
> >>
> >>> cannot change.
> >>> /dev/tape/by-id/scsi-3500308c09fb49000-nst
> >>>
> >>> When you made jukebox, you should select use persistent names and NMC:s
> >>
> >> graphical gui uses
> >>
> >>> automatic this by-id name convention or manual with command jbconfig
> >>> -p,
> >>
> >> but jbconfig is'nt
> >>
> >>> recommed to use at newer Networker versions.
> >>
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