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EMC, PowerPath and issue on using LUN

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Operating Systems Linux EMC, PowerPath and issue on using LUN
# 1  
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.
# 2  
Old 12-14-2011
post output from :

Code:
ls -al /dev|grep -i emc*

Also output from
Code:
fdisk -l /dev/sdb

Last edited by dude2cool; 12-14-2011 at 03:53 PM..
# 3  
Old 12-14-2011
Code:
# ls -al /dev|grep -i emc*
crw-r--r--  1 root root  10,   62 Aug 30 16:29 emcpower
brw-r-----  1 root disk 120,    0 Aug 30 16:29 emcpowera
brw-r-----  1 root disk 120,   16 Aug 30 16:29 emcpowerb
brw-r-----  1 root disk 120,   32 Aug 30 16:29 emcpowerc
brw-r-----  1 root disk 120,   48 Aug 30 16:29 emcpowerd
brw-r-----  1 root disk 120,   64 Aug 30 16:29 emcpowere
brw-r-----  1 root disk 120,   80 Dec 13 11:43 emcpowerf
crw-r-----  1 root kmem   1,    1 Aug 30 16:28 mem
crw-------  1 root root   1,   12 Aug 30 16:28 oldmem
crw-r-----  1 root kmem   1,    4 Aug 30 16:28 port

#fdisk -l /dev/sdb
#

# 4  
Old 12-14-2011
So nothing from fdisk -l /dev/sdb. Hmm, can you look at dmeg or /var/log/messages to see if any errors are logged when you run fdisk -l /dev/sdb and also any specific errors logged on fdisk -l /dev/emcpowerf ?
# 5  
Old 12-15-2011
No problem, here's the output from fdisk -l /dev/sdb:
Code:
Dec 15 08:58:58 dblnx25ec kernel: Buffer I/O error on device sdb, logical block 0
Dec 15 08:58:58 dblnx25ec kernel: Buffer I/O error on device sdb, logical block 1
Dec 15 08:58:58 dblnx25ec kernel: Buffer I/O error on device sdb, logical block 2
Dec 15 08:58:58 dblnx25ec kernel: Buffer I/O error on device sdb, logical block 3
Dec 15 08:58:58 dblnx25ec kernel: Buffer I/O error on device sdb, logical block 0
Dec 15 08:58:58 dblnx25ec kernel: Buffer I/O error on device sdb, logical block 524287
Dec 15 08:58:58 dblnx25ec kernel: Buffer I/O error on device sdb, logical block 524287
Dec 15 08:58:58 dblnx25ec kernel: Buffer I/O error on device sdb, logical block 0
Dec 15 08:58:58 dblnx25ec kernel: Buffer I/O error on device sdb, logical block 1
Dec 15 08:58:58 dblnx25ec kernel: Buffer I/O error on device sdb, logical block 2

and from fdisk -l /dev/emcpowerf
Code:
Dec 15 08:59:38 dblnx25ec kernel: Buffer I/O error on device emcpowerf, logical block 0
Dec 15 08:59:38 dblnx25ec kernel: Buffer I/O error on device emcpowerf, logical block 1
Dec 15 08:59:38 dblnx25ec kernel: Buffer I/O error on device emcpowerf, logical block 2
Dec 15 08:59:38 dblnx25ec kernel: Buffer I/O error on device emcpowerf, logical block 3
Dec 15 08:59:38 dblnx25ec kernel: Buffer I/O error on device emcpowerf, logical block 0
Dec 15 08:59:38 dblnx25ec kernel: Buffer I/O error on device emcpowerf, logical block 524287
Dec 15 08:59:38 dblnx25ec kernel: Buffer I/O error on device emcpowerf, logical block 524287
Dec 15 08:59:38 dblnx25ec kernel: Buffer I/O error on device emcpowerf, logical block 0

So, basically the same thing...
# 6  
Old 12-15-2011
Here's my silly question...
Why have you not contacted EMC support? If you are using powerpath, they should support you.
# 7  
Old 12-15-2011
Simply put, we don't have support for this storage (at least for that, only for incidents), at least that's what I've being told Smilie .
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