Question about Storagetek L80 DLT Tape Drive

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My Storegtek L80 can't recognize all of its tape drives

My Storegtek L80 can't recognize all of its tape drives
It contains 4 drives connected by Fibre Channel interface (which contains 2 SCSI ports to connect library and drives)
Every thing was nice until a problem happened in one drive and the medium changer (robot) so the responsible tech. replaced them than the problems began
I tried to connect the library and drives with the fiber router scsi ports by different ways of external scsi cables and every time some drives appears and some of them disappear also some times one drive take the World Wide Name of the medium changer (and add another alias with the same WWN of mc) so mc doesn't appear
Now and after many trials I can use only 2 drives with the mc
All of my external scsi cables were tested ok
If I tried to use the external scsi cable topology for connecting drives and library (which found in the L80 manual and it is my previous topology before problems) only 2 drives recognized and the mc not recognized (and one of the 2 recognized drives had the name WWN of mc)

Is it cabling topology issue? Or Fibre Channel interface issue or what?
And what is the concept of connecting more than drive and mc with Fibre Channel interface scsi ports by using external scsi cables?
We also are having very similar issues. They are not identical, but they are close. The StorageTek is connected thru JNI HBA fiber cards to (and we have tried two different systems) Windows 2000 Server(s) with Legato Networker 7.3.2.
The system has been solid for 5 years running. And an issue with one backup pool developed into the entire system not recognizing the changer robot and the inability to see all four drives consistently. The Sun technician had everything so screwed up after leaving that we brought up our DR test server and configured it with legato and the HBA's. We get so far, but we never see the library changer at all in Windows. We only see differing numbers of drives. Legato Networker will see the Jukebox changer/ but Windows doesn't. We had to manually insert the tapes and kick off jobs to just to get a backup. This is really getting serious now as it has been almost two weeks since we have been able to schedule and run all of our backup routines. Did you ever get your's corrected?

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That thing required a SCSI terminator pack doesn't it.

If so, is it working properly.

I've had those things go out on me before leaving me to pull my hair out many times.

Posted on Jun 14, 2008

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