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MSL2024 Tape Library

 
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Regular Advisor

MSL2024 Tape Library

Good Morning,

We recetnly install this tape library on a ES40's. This library is connect to the SAN switch that goes with the Fibre Channel disk subsystem. I know with the system disk, we had to do a WWIDMGR setup to see the disks, do we need to do the same with these tape drives?

After the site had a downtime, they rebooted and they were not able to see the tape drives. They had to do an IO Find, then an IO Auto.
20 REPLIES 20
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Respected Contributor

Re: MSL2024 Tape Library


No you don't do WWIDMGR for the tape drives. The IO FIND and IO AUTO was sufficient.
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Regular Advisor

Re: MSL2024 Tape Library

I understand that the IO Find and IO Auto will give will give them access to the tape drive, however, they should not have to do this everytime they reboot the system. I trying to find a solution that will keep the access to the tape drive intact without having to do IO steps.
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Respected Contributor

Re: MSL2024 Tape Library

No it does not have to be done every time you reboot the system. Only once.

The information is stored in SYS$SYSTEM:SYS$DEVICES.DAT and unless you delete that file the information should remain through reboots.

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Regular Advisor

Re: MSL2024 Tape Library

Well, it didn't remain after a system reboot. It is also happening with the AS4100 too. These tape drive are not connect directly to the node. They are connected to the SAN switches but fibre.
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Respected Contributor

Re: MSL2024 Tape Library


Are you up to date with your patches, especially FIBRE-SCSI?

Please provide hardware models and OS versions. Can you also attach the file SYS$SYSTEM:SYS$DEVICES.DAT (it's a text file)?
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Respected Contributor

Re: MSL2024 Tape Library

Also check your loop mode on your MSL. It should be set to hard, not soft.
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Respected Contributor

Re: MSL2024 Tape Library

Actually forget that loop mode comment... you are connected to a switch. I don't think that parameter applies in this case.
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Regular Advisor

Re: MSL2024 Tape Library

Not sure if my last response made it.

The two types of system effected at ES40's and As4100. They are both operating at OpenVMS 7.3-2 with
DEC AXPVMSVMS732_FIBRE_SCSI V11.0.

Attached is the Sys$devices.dat file. The new tape drives are referenced in the file, but they did not get setup after the reboot.

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Respected Contributor

Re: MSL2024 Tape Library

We're probably not getting the complete story here. When you said the site had a downtime did that include the tape library (being powered off or losing power, etc?)

How may reboots did you do wherein the tape drives didn't show up after the reboot? I have a feeling it's just once (for each system). Have you tested by rebooting again?

My gut feeling is that the id's on tape library changed somehow and so when VMS booted up it didn't configure the tape drives. That's just a guess though. I strongly suggest trying another reboot with logging of the startup (enable this through sysman startup).