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MSL6000 Library with two host one controller card

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Jeremiah Gillespie
Occasional Contributor

MSL6000 Library with two host one controller card

I have a MSL6000 tape library, with one controller card inside the library with two SCSI interfaces. I have two host clustered, however, I am not accessing the the library at the same time with both hosts. At any giving time only one host is accessing/controlling the library. If one host fails the other one will take over. Is this possible with one controller card in the library?

Please see attachment
5 REPLIES
Torsten.
Acclaimed Contributor
Solution

Re: MSL6000 Library with two host one controller card

No.

You can do this easily if you use FC connection and an optional NSR card.

In your drawing only host B has access to the drives...


Hope this helps!
Regards
Torsten.

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Jeremiah Gillespie
Occasional Contributor

Re: MSL6000 Library with two host one controller card

I have attached a new cabling configuration. I am wondering if this is possible. I am running Veritas 6.5 in a cluster mode. Host-A is accessing the library at one time, is this possible?
Torsten.
Acclaimed Contributor

Re: MSL6000 Library with two host one controller card

You can have only 1 library controller installed. IMHO sharing the library on the scsi bus is not supported at all.

As said, consider to use fiber channel.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

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No support by private messages. Please ask the forum!

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Marino Meloni_1
Honored Contributor

Re: MSL6000 Library with two host one controller card

The second diagram will never work
the first one may work, but you should have differents sci id in the host bus adapter, we had this kind of config with disk on early cluster systems.
But the result of this config should be tested by yourself, and will never been supported by HP, as there is (as already indicated) a HP solution to this question, and it is a NSR in the middle, that will allow to connect even more than two hosts at the same library, sharing both drives and robot.
Jeremiah Gillespie
Occasional Contributor

Re: MSL6000 Library with two host one controller card

Thanks everyone, I will look into purchasing a NSR (e1200-160 or e1200-320) for the library. Thread Ref# Optional Fibre Channel Card for MSL family