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Full Discussion: EMC, PowerPath and issue on using LUN
Operating Systems Linux EMC, PowerPath and issue on using LUN Post 302581943 by Zarnick on Wednesday 14th of December 2011 12:37:03 PM
Old 12-14-2011
EMC, PowerPath and issue on using LUN
Hello guys, I'm going crazy over here with a problem with a LUN created on a EMC CX3.
I did sucessfully managed to create the LUN on the Storage (the LUN is named DBLNX25EC_TST), after doing the following process:
Code:
echo "1" > /sys/class/fc_host/host<n>/issue_lip
and
echo "- - -" > /sys/class/scsi_host/host<n>/scan
then
powermt config
powermt save

I've managed to see the mentioned LUN as device emcpowerf
Code:
powermt display dev=all
...
Pseudo name=emcpowerf
CLARiiON ID=CK200074600446 [DBLNX25EC]
Logical device ID=6006016081B11E00F0DD1B23CD24E111 [DBLNX25EC_TST]
state=alive; policy=CLAROpt; priority=0; queued-IOs=0;
Owner: default=SP B, current=SP B       Array failover mode: 1
==============================================================================
--------------- Host ---------------   - Stor -   -- I/O Path --  -- Stats ---
###  HW Path               I/O Paths    Interf.   Mode    State   Q-IOs Errors
==============================================================================
   1 qla2xxx                  sdb       SP A2     active  alive       0      0
   1 qla2xxx                  sdh       SP B3     active  alive       0      0
   2 qla2xxx                  sdn       SP B2     active  alive       0      0
   2 qla2xxx                  sdt       SP A3     active  alive       0      0

However, when I try to create a partition, here's the fdisk output:
Code:
fdisk /dev/emcpowerf

Unable to read /dev/emcpowerf

What am I missing?

Thanks in advance.
 

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LEARN ABOUT SUSE

sg_emc_trespass

SG_EMC_TRESPASS(8)						     SG3_UTILS							SG_EMC_TRESPASS(8)

NAME

       sg_emc_trespass - Changes ownership of a LUN from another Service-Processor to this one.

SYNOPSIS

       sg_emc_trespass [-d] [-hr] [-s] [-V] DEVICE

DESCRIPTION

       sg_emc_trespass	sends  an EMC-specific Trespass Command to the DEVICE with the selected options. This Mode Select changes the ownership of
       the LUN of the device from another Service-Processor to the one the command was received on.

OPTIONS

       Arguments to long options are mandatory for short options as well.

       -d     outputs some extra debug information associated with executing this command

       -hr    Sets the 'Honor Reservation' bit in the command. If set, the trespass will only succeed to change the ownership from the Peer SP	if
	      the Peer SP does not have an outstanding SCSI reservation for the LUN. By default, the reservation state will be ignored.

       -s     Send the short version of the trespass command instead of the long version. The short version is supported on the EMC FC5300, FC4500
	      and FC4700. The long version (default) is supported on the CLARiiON CX and AX family arrays.

       -V     print out version string then exit.

       In the 2.4 series of Linux kernels the DEVICE must be a SCSI generic (sg) device. In the 2.6 series block devices (e.g. SCSI disks and  DVD
       drives) can also be specified. For example "sg_start 0 /dev/sda" will work in the 2.6 series kernels.

EXIT STATUS

       The exit status of sg_emc_trespass is 0 when it is successful. Otherwise see the sg3_utils(8) man page.

AUTHOR

       Written by Lars Marowsky-Bree, based on sg_start.

REPORTING BUGS

       Report bugs to <dgilbert at interlog dot com>.

COPYRIGHT

       Copyright (C) 2004 Lars Marowsky-Bree, Douglas Gilbert.
       This  software  is distributed under the GPL version 2. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
       POSE.

sg3_utils-1.23							   January 2007 						SG_EMC_TRESPASS(8)
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