MSL4048 and HP-UX looses devices

[jpmartin]

I have some troubles with lost devices on some HP-UX 11iv3 (March 2011) which addresses MSL4048-LTO5 FC drives, and no problems with a Windows server acting as Data Protector Server.

A new 'ioscan' or a reboot of the HP-UX servers gives lost devices of LTO5 drives.

The solution is to reboot the MSL4048!!!

The MSL4048 LTO5 drives are connected on 2 8/24 FC switches in Fabric mode, and the HP-UX servers are some BL860c i2 connected on Virtual Connect FC 8Gb, which are connected on the 2 same 8/24 FC switches.

Any idea ?

Jean-Pierre

[Michael Leu]

Check the HP-UX syslog for 'replace wwid' messages and do those commands if applicable.

[jpmartin]

no 'replace wwid' in the messages, but :

0/0/0/5/0/0/0: Device at device id 0xf0b00 has disappeared from Name Server GPN_FT
(FCP type) response, or its 'Port World-Wide Name' has changed.
device id = loop id, for private loop devices
device id = nport ID, for fabric/public-loop devices
System won't be able to see LUNs behind this port.

0/0/0/5/0/0/1: Device at device id 0x190a00 has disappeared from Name Server GPN_FT
(FCP type) response, or its 'Port World-Wide Name' has changed.
device id = loop id, for private loop devices
device id = nport ID, for fabric/public-loop devices
System won't be able to see LUNs behind this port.

class : tgtpath, instance 5
Target path (class=tgtpath, instance=5) has gone offline. The target path h/w path is 0/0/0/5/0/0/0.0x5001438009ae328c

class : tgtpath, instance 3
Target path (class=tgtpath, instance=3) has gone offline. The target path h/w path is 0/0/0/5/0/0/1.0x5001438009ae394a

class : tgtpath, instance 5
Target path (class=tgtpath, instance=5) has gone online. The target path h/w path is 0/0/0/5/0/0/0.0x5001438009ae328c

class : tgtpath, instance 3
Target path (class=tgtpath, instance=3) has gone online. The target path h/w path is 0/0/0/5/0/0/1.0x5001438009ae394a

[hvhari]

I have seen such issues when the windows server "polls" the drives in SAN. Below article may help you on this.

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c02496669&prodTypeId=12169&prodSeriesId=3936307

[jpmartin]

A HP case is opened