Intermittently EMC targets are listed as "Unknown Type" instead of "Disk Device" (Doc ID 1466564.1)

Last updated on JULY 31, 2012

Applies to:

Emulex FC HBA - Version Not Applicable to Not Applicable [Release N/A]
Information in this document applies to any platform.

Symptoms

<p >*Symptoms
<span >Briefly describe the symptoms of the problem. Remember to delete any customer specific information

 
Intermittent, ongoing san connectivity issues causing lost of access to san storage and cluster servers to reboot


- Intermittently EMC targets are listed as "Unknown Type" instead of "Disk Device"

- EMC Powerpath list LUNs as dead

- Storage Driver analysis of debug messages indicate incomplete data payload being received.

The GA_NXT, FS_ACC payload format is suppose to include the port type, port Identifier, port name, and the symbolic port name (which tell us what is it..). The only thing we get is the first 16 bytes of the payload:

...  CT comp.  (GA_NXT: CT_ACC: Rsn=0 Exp=0 [  01010c00,  50060168  ])

The 01010c00 gives us the port type (01) and port identifier (010c00, which is basically the switch port number that the
storage device is connected to). The 50060168 is the port name (and we only get the first four bytes of the 5006016841e063b8 WWN).
So, I suspect that we are not getting correct symbolic port name (like Clariion, etc..) that tells us what type of storage device it is..

Based on my experience with "Unknown Type" condition, it is normally a result of any issue on the storage (permission, hardware, link, etc..), or the Name Server  on the switch is not passing the correct info (which is based on the data the switch gets when the storage port logs in..)



===================================

explorer.-2012.02.04.11.46

c2 = emlxs0 (fp1) -> /devices/pci@9,600000/SUNW,emlxs@1/fp@0,0:devctl
================================================================================
Pos  Port_ID Hard_Addr Port WWN         Node WWN         Type
0    10c00   0         5006016841e063b8 50060160c1e063b8 0x0  (Disk device)
1    11c00   0         5006016141e063b8 50060160c1e063b8 0x1f (Unknown Type) <<<
2    19c00   0         10000000c9632565 20000000c9632565 0x1f (Unknown Type,Host Bus Adapter)


c3 = emlxs1 (fp2) -> /devices/pci@9,600000/SUNW,emlxs@2/fp@0,0:devctl
================================================================================
Pos  Port_ID Hard_Addr Port WWN         Node WWN         Type
0    10c00   0         5006016041e063b8 50060160c1e063b8 0x1f (Unknown Type) <<<
1    11c00   0         5006016941e063b8 50060160c1e063b8 0x1f (Unknown Type) <<<
2    19c00   0         10000000c9632852 20000000c9632852 0x1f (Unknown Type,Host Bus Adapter)


===================================

explorer.-2012.03.06.00.06

c2 = emlxs0 (fp1) -> /devices/pci@9,600000/SUNW,emlxs@1/fp@0,0:devctl
================================================================================
Pos  Port_ID Hard_Addr Port WWN         Node WWN         Type
0    10c00   0         5006016841e063b8 50060160c1e063b8 0x0  (Disk device)
1    11c00   0         5006016141e063b8 50060160c1e063b8 0x1f (Unknown Type) <<<
2    19c00   0         10000000c9632565 20000000c9632565 0x1f (Unknown Type,Host Bus Adapter)


c3 = emlxs1 (fp2) -> /devices/pci@9,600000/SUNW,emlxs@2/fp@0,0:devctl
================================================================================
Pos  Port_ID Hard_Addr Port WWN         Node WWN         Type
0    10c00   0         5006016041e063b8 50060160c1e063b8 0x0  (Disk device)
1    11c00   0         5006016941e063b8 50060160c1e063b8 0x0  (Disk device)
2    19c00   0         10000000c9632852 20000000c9632852 0x1f (Unknown Type,Host Bus Adapter)


===================================

explorer.8444e4c8.rmapps07-2012.03.13.23.39

c2 = emlxs0 (fp1) -> /devices/pci@9,600000/SUNW,emlxs@1/fp@0,0:devctl
================================================================================
Pos  Port_ID Hard_Addr Port WWN         Node WWN         Type
0    10c00   0         5006016841e063b8 50060160c1e063b8 0x0  (Disk device)
1    11c00   0         5006016141e063b8 50060160c1e063b8 0x0  (Disk device)
2    19c00   0         10000000c9632565 20000000c9632565 0x1f (Unknown Type,Host Bus Adapter)


c3 = emlxs1 (fp2) -> /devices/pci@9,600000/SUNW,emlxs@2/fp@0,0:devctl
================================================================================
Pos  Port_ID Hard_Addr Port WWN         Node WWN         Type
0    10c00   0         5006016041e063b8 50060160c1e063b8 0x0  (Disk device)
1    11c00   0         5006016941e063b8 50060160c1e063b8 0x0  (Disk device)
2    19c00   0         10000000c9632852 20000000c9632852 0x1f (Unknown Type,Host Bus Adapter)


===================================

explorer.8444e4c8.rmapps07-2012.03.15.17.05

c2 = emlxs0 (fp1) -> /devices/pci@9,600000/SUNW,emlxs@1/fp@0,0:devctl
================================================================================
Pos  Port_ID Hard_Addr Port WWN         Node WWN         Type
0    10c00   0         5006016841e063b8 50060160c1e063b8 0x1f (Unknown Type) <<<
1    11c00   0         5006016141e063b8 50060160c1e063b8 0x0  (Disk device)
2    19c00   0         10000000c9632565 20000000c9632565 0x1f (Unknown Type,Host Bus Adapter)


c3 = emlxs1 (fp2) -> /devices/pci@9,600000/SUNW,emlxs@2/fp@0,0:devctl
================================================================================
Pos  Port_ID Hard_Addr Port WWN         Node WWN         Type
0    10c00   0         5006016041e063b8 50060160c1e063b8 0x0  (Disk device)
1    11c00   0         5006016941e063b8 50060160c1e063b8 0x0  (Disk device)
2    19c00   0         10000000c9632852 20000000c9632852 0x1f (Unknown Type,Host Bus Adapter)


===================================

Changes

 None known of.

Cause

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