SAN Client: ARCHIVE Python device disappears

Question

Hi All,
Recently; i've been experiancing issues in a SAN client. Let me explain how its all setup,

San Client: Windows 2008 R2 EE, on&nbsp;QLE2462.
		FT Media Server: RHEL 5.5 x64, targer HBA&nbsp;on QLE2462
		Zoning: WWPN of one port in SAN Client is zoned to both target HBA port's WWPN.
		Master Server: Windows 2008 R2 EE

Initially 4 ARCHIVE Python device were showing up in the client device manager and backups were running fine. Now, i see the ARCHIVE Python devices disappering most of the time. Its unusual, that sometimes i see 4&nbsp;ARCHIVE Python devices and then they decrease to 3 or 2 and so on; also i do see SCSI devices (attached the screen shot). I can feel that you may question on Zoning, i did get same thought and checked there were no changes in zoning.
I checked the FT target device state, they are active and FT service are running.
&nbsp;

[root@FTSERVER admincmd]# ./nbftconfig -listtargets
	m FTSERVER
	d 0 0 w # active FABRIC QLE246x Series FC Hba Qlogic
	d 0 1 w # active FABRIC QLE246x Series FC Hba Qlogic
	d 1 0 w # active FABRIC QLE246x Series FC Hba Qlogic
	d 1 1 w # active FABRIC QLE246x Series FC Hba Qlogic

Tried re-installing the FT media server too, but nothing changed. The SAN Client's HBA drivers are latest. I Suspect something has gone wrong in the Clients Operating system and would want to find what went wrong.
&nbsp;
Any inputs by you experts is highly appreciated.
&nbsp;
&nbsp;
-Rizwan

mark_solutions · Accepted Answer

You have either a faulty HBA, faulty cables, a bad switch or a bad library - but somethiung is sending resets to the device and then it shows as being in use
You need to see if you can get logs from everything to see if you can pin it down.
There are setting on some switches that can cause a reset as well as on the HBA itself.
Also worth checking your media servers for ophaned bptm processes that can be causing issues in view of the "resource is in use comment" - this is what you get when Removable Storage Service or TUR has not been dealt with but also when bptm / bpbrm processes have been orphaned.
Are you sure nothing else is zoned to it that shouldn't be?.

rizwan84tx · Answer

Mark,
As you guessed that switch could be faulty; on checking the SAN switch logs for client connected port, appeared the port was going offline many times.
&nbsp;
Fabric log reports the switch port going offline many times.

Time Stamp&nbsp;&nbsp; Input and *Action&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; S, P&nbsp;&nbsp; Sn,Pn&nbsp; Port&nbsp; Xid
		==================================================================
		13:32:56.206 SCN LR_PORT (0);g=0x65b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D2,P0&nbsp; D2,P0&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp; NA
		13:32:56.209 SCN Port Online;g=0x65b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D2,P0&nbsp; D2,P1&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp; NA
		13:33:00.223 SCN Port Offline;g=0x65d&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; D2,P1&nbsp; D2,P0&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp; NA
		13:33:00.243 *Removing all nodes from port&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D2,P0&nbsp; D2,P0&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp; NA
		13:33:02.270 SCN LR_PORT (0);g=0x65d&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D2,P0&nbsp; D2,P0&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp; NA
		13:33:02.276 SCN Port Online;g=0x65d&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; D2,P0&nbsp; D2,P1&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp; NA

Connected the client to different FC port, BINGO!!! issue got resolved. I'm marking your post as solution.

mark_solutions · Answer

Windows 2008 doesn't have the Removable Storage Service installed by default but check that it does not have it and if it does stop and disable it as this will take the drives away from NetBackup.
Next make sure that Windows is not interferring with the tape drives via its drivers by disabling the Windows Tape Unit Ready commands - see this tech note:
http://support.microsoft.com/kb/842411
This applies in the same way to all Windows versions

rizwan84tx · Answer

Mark,
There is no Removable Storage Service; i have disabled TUR as per the MS technote and rebooted the client. The issue still persists.

mark_solutions · Answer

Firewall / Antivirus blocking something - you don't use McAffee do you?

marianne · Answer

Any errors in Event Viewer System and/or Application logs?
Windows Storport driver is known for 'misbehaving'.

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SAN Client: ARCHIVE Python device disappears

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