Bug 187773 - MPIO Support for lpfc
MPIO Support for lpfc
Status: CLOSED WONTFIX
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
4.0
i386 Linux
medium Severity medium
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Assigned To: Tom Coughlan
Brian Brock
: FutureFeature
Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2006-04-03 11:27 EDT by Falko Pilz
Modified: 2012-06-20 12:00 EDT (History)
1 user (show)

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Fixed In Version:
Doc Type: Enhancement
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Last Closed: 2012-06-20 12:00:58 EDT
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RHEL 7.3 requirements from Atomic Host:


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Description Falko Pilz 2006-04-03 11:27:22 EDT
Description of problem:
At my outher Servers I got Qlogic-FC-Cards they are working well with my SAN in
an MPIO mode. Today I got a Server with Emulex LP9802 FC-Cards and see a
Harddisk for every path to the LUN.

Version-Release number of selected component (if applicable):
RHEL4 nativ without any updates at the moment.

How reproducible:
load the lpfc module 


Steps to Reproduce:
1. rmmod lpfc
2. modprobe lpfc
3. dmesg
  
Actual results:

scsi8 : Emulex LightPulse LP9802 2 Gigabit PCI Fibre Channel Adapter on PCI bus
09 device 10 irq 58
scsi: unknown device type 12
  Vendor: HP        Model: HSV200            Rev: 5031
  Type:   RAID                               ANSI SCSI revision: 05
Attached scsi generic sg7 at scsi8, channel 0, id 0, lun 0,  type 12
scsi: unknown device type 12
  Vendor: HP        Model: HSV200            Rev: 5031
  Type:   RAID                               ANSI SCSI revision: 05
Attached scsi generic sg8 at scsi8, channel 0, id 1, lun 0,  type 12
scsi: unknown device type 12
  Vendor: HP        Model: HSV200            Rev: 5031
  Type:   RAID                               ANSI SCSI revision: 05
Attached scsi generic sg9 at scsi8, channel 0, id 2, lun 0,  type 12
scsi: unknown device type 12
  Vendor: HP        Model: HSV200            Rev: 5031
  Type:   RAID                               ANSI SCSI revision: 05
Attached scsi generic sg10 at scsi8, channel 0, id 3, lun 0,  type 12


Expected results:

I don't know.

Additional info:
Comment 1 Tom Coughlan 2006-04-03 14:04:06 EDT
The direction that Linux is taking is to make all the lower-level drivers
present all paths to a device as separate devices. It is then up to the
DM-multipath component to combine the paths into a virtual device. 

The Qlogic and the Emulex drivers in RHEL 3 and 4 have always done this by
default. If your Qlogic driver is combining multiple paths, then I believe you
are not using the driver that ships with RHEL, or you are setting some
non-default parameter. 

The output shown above, where you have "unknown device type", "Type: RAID", and
sg driver rather than sd driver may be a different problem. Please upgrade to
Update 3, make sure that the Emulex HBA has been granted access to the LUNs, and
try this again. Post the full /var/log/messages if there is still a problem.  

 
Comment 3 Jiri Pallich 2012-06-20 12:00:58 EDT
Thank you for submitting this issue for consideration in Red Hat Enterprise Linux. The release for which you requested us to review is now End of Life. 
Please See https://access.redhat.com/support/policy/updates/errata/

If you would like Red Hat to re-consider your feature request for an active release, please re-open the request via appropriate support channels and provide additional supporting details about the importance of this issue.

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