Fibre Channel (SAN)

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Contributor
Posts: 31
Registered: ‎04-16-2007

FC shared tape devices randomly disapearing on HP servers (Windows)

Hi there, since we have FC tapes device (20x sdlt600 on 2x Storagetek L700 library) shared among 20 servers we are currently having some strange behaviour. We are a Microsoft, HP shop and from time to time the devices disappeared randomly. When it happen on a Windows OS plug and play generate and error that the tape devices had disappeared and wasn’t removed properly. To bring back the devices we need to reboot the server. I suspect a HBA or fabric configuration. Here a high overview of our current san infrastructure.

Dual fabric with DCX and 48000. Tape devices are zoned on one fabric. Switch port for the tape devices have been configured as G port. Port speed have been lockdown to 2 GB/s (tape devices speed), all tapes devices have their own alias and zone with the servers. Ten devices are connected to fabric A and the other on fabric B.

Thank you for taking time to read this discussion

Occasional Contributor
Posts: 17
Registered: ‎04-17-2008

Re: FC shared tape devices randomly disapearing on HP servers (Windows)

Hi,

There's several different things that need to be disabled on a Windows machine:

- Disable the service 'Removable Storage Manager'

- Disable TUR requests from Windows (2003); http://support.microsoft.com/kb/842411

If HP Proliant Support Pack is installed, check the the HP Managment Agents via the Control panel. There's a tab for tape drive polling or something, which should be disable

I guess the polling/RSM issue is the biggest, especially with loop-attached tape drives.

Regards,

Martien

Super Contributor
Posts: 425
Registered: ‎03-03-2010

Re: FC shared tape devices randomly disapearing on HP servers (Windows)

Why the tape devices port is G-port. It should be F port not even L port as noramally while you connect the tape devices, it shows L port.

The speed shoud be AN.Also in Win OS this is a common issue.Upgrade the HBA drivesr and FW according to Brocade compatibility matrix.what is the FOS ?

The best way to do the zoning is separate HBAs for Tape and storage

If you find it correct , then make it correct pls

Pls find attached Brocade compatibility matrix.

Contributor
Posts: 31
Registered: ‎04-16-2007

Re: FC shared tape devices randomly disapearing on HP servers (Windows)

Hi

We are currently investigating the KB article, mention by MKore.

G port is a port configuration that removed the loop initialization process it go directly to fabric login process, all the tape devices are connect to a F port on the switch as for the zone configuration the storage and tapes are in the same zone but different alias. This will be look to.

Last thank you for the Brocade Compability document.

Super Contributor
Posts: 425
Registered: ‎03-03-2010

Re: FC shared tape devices randomly disapearing on HP servers (Windows)

The biggest mistake: keep two zones for tape and storage

and see the difference, make all ports from L to F port

and take 2 HBAs , 1 for storage and 1 for tape

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