MaC15
2 Bronze

IBM Power7 + Clariion + PowerPath

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Hello guys,

I have this issue:

I tried to migrate from IBM Power6 to IBM Power 7. I rolled back because in AIX the bootlist didn't show the 4 paths to HD in SAN.

For example, in power 6 it shows right:

hdisk2 blv=hd5
hdisk28 blv=hd5
hdisk4
hdisk20

In power 7, I recreated the bosboot with 4 HD (bootlist -m normal hdisk2 hdisk28 hdisk4 hdisk20) but then appears only 2 HD and 2 dashes (-) :

# bootlist -m normal -o

hdisk2 blv=hd5

hdisk28

-

-

Power Path version is the last available: 5.3 SP1

==============================================================================
---------------- Host ---------------   - Stor -   -- I/O Path -  -- Stats ---
###  HW Path                I/O Paths    Interf.   Mode    State  Q-IOs Errors
==============================================================================
   1 fscsi1                    hdisk20   SP A5     active  alive      0      0
   1 fscsi1                    hdisk28   SP B4     active  alive      0      0
   0 fscsi0                    hdisk2    SP B5     active  alive      0      0
   0 fscsi0                    hdisk4    SP A4     active  alive      0      0

For the record, I know that this is probably a IBM AIX issue (because powerpath shows 4 HD), but maybe it happened to someone.

Someone had the same issue ?

Thanks,

Mariano.

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kelleg
5 Tungsten

Re: IBM Power7 + Clariion + PowerPath

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Mariano,

Did your procedure fix your problem? If so, could you please mark this thread as answered - that way when someone else has a similar problem, they will be able to search and use your procedure as it is "answered".

Thanks,

glen

View solution in original post

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Nollaig1
3 Argentium

Re: IBM Power7 + Clariion + PowerPath

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Hello Mariano,

  Have a look at knowledgebase article emc92878 in powerlink . A similar issue occurred when upgrading to ML03 in an older version of Powerpath.

The article lists the cause and workaround as well. Might be worth checking against your system in case its something similar?

I hope this helps,

    Nollaig

MaC15
2 Bronze

Re: IBM Power7 + Clariion + PowerPath

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Great info Nollaig. I will ckech it.

Regards,

Mariano.

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MaC15
2 Bronze

Re: IBM Power7 + Clariion + PowerPath

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I folowed the procedure in emc92878 and didn't work out.

Someone here has IBM Power 7 + Boot disk in Clariion ?

Regards,
Mariano.

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tcmaij
1 Copper

Re: IBM Power7 + Clariion + PowerPath

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Hello,

perhaps this has nothing to do with other hardware or os. Last weekend I had a similar problem with blv after migrating on existing systems to a higher TL level of AIX (from AIX 5.3 TL9 to 12)

A long while ago I used this script to remove all disks in my environment:

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


# Synchronizing Disk Names: use it when you are confused with you disks
# Your disks will be reconfigured after a reboot. Data will be save

#!/bin/ksh

   lsdev -Cc disk | awk '{ print $1 }' | while read HDname; do
             odmdelete -q "name = $HDname" -o CuAt
             odmdelete -q "value = $HDname" -o CuAt
             odmdelete -q "name = $HDname" -o CuDv
             odmdelete -q "value3 = $HDname" -o CuDvDr
             odmdelete -q "name = $HDname" -o CuVPD
   done
   rm -f /dev/hdisk*
   rm -f /dev/rhdisk*
   savebase

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

Then reboot and use the following EMC procedure: emc92878

em:
After upgrading AIX 5.2 to ML03 (Maintenance Level 3), the bootlist command shows - (dash) in the device list for an available hdisk# a
below:
Before upgrade to ML03 :
#bootlist -m normal -o
hdisk17
hdisk6
#
After upgrade to ML03 :
#bootlist -m normal -o
- <--- (error)
hdisk17
#
Change: Upgrade AIX 5.2 from ML02 to ML03
Root Cause:
This issue has been seen if the hdiskpower entry is located before hdisk entry in the ODM CuDv table. AIX code checks the first device th
the wwpm and LUN and assumes that all devices are of subclass "fcp".
The first device matched in this case is hdiskpower0 because it has the same wwpn and lun#. However, the subclass is "pseudo" which i
recognised by AIX code.
Fix:
In this fix description , we are assuming that rootvg is on hdiskpower0
#powermt display dev=0
Pseudo name=hdiskpower0
Symmetrix ID=000287460464
Logical device ID=027F
state=alive; policy=SymmOpt; priority=0; queued-IOs=0
==============================================================================
---------------- Host --------------- - Stor - -- I/O Path - -- Stats ---
### HW Path I/O Paths Interf. Mode State Q-IOs Errors
==============================================================================
1 fscsi1 hdisk17 FA 13cA active alive 0 0
0 fscsi0 hdisk6 FA 4cA active alive 0 0
#bootlist -m normal -o
hdisk17
- <<<<<<< hdisk6 is missing
#
Procedure :
1. save hdiskpower0 entry in a file : odmget -q"name=hdiskpower0" CuDv > /tmp/hdiskpower0.add
2. save hdisk6 (hdisk with - in bootlist) entry in a file : odmget -q"name=hdisk6" CuDv > /tmp/hdisk6.add
3. delete hdiskpower0 entry fron CuDv : odmdelete -o CuDv -q"name=hdiskpower0"
4. delete hdisk6 entry fron CuDv : odmdelete -o CuDv -q"name=hdisk6"
5. adds hdisk6 back : odmadd /tmp/hdisk6.add
6. check if bootlist is ok : bootlist -m normal -o
7. adds hdiskpower0 back : odmadd /tmp/hdiskpower0.add
8. check if bootlist is ok : bootlist -m normal -o
9. if all the above is ok , you can save the changes to boot image : savebase -v
10. reboot the host
11. check if bootlist is ok : bootlist -m normal -o
or for more details : bootlist -m normal -v -r

In my case I removedall hdiskpowerX entries before the hdisk with blv on it. Try it out!

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MaC15
2 Bronze

Re: IBM Power7 + Clariion + PowerPath

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The solution was remove all hdiskpower and reinstall Power Path.

Maybe my procedure could help someone else:

1)

pprootdev off

Reboot

2)

cp /etc/objrepos/CuAt /etc/objrepos/CuAt.bak

cp /etc/objrepos/CuDv /etc/objrepos/CuDv.bak

cp /etc/objrepos/CuDvDr /etc/objrepos/CuDvDr.bak

cp /etc/objrepos/CuVPD /etc/objrepos/CuVPD.bak

3)

vary off all the volume groups (apart from rootvg, of course)

4)

powermt remove dev=all

lsdev -Cc disk -Fname | grep power | xargs -n1 rmdev -dl

odmdelete -q "name like hdiskpower*" -o CuAt

odmdelete -q "name like hdiskpower*" -o CuDv

odmdelete -q "value3 like hdiskpower*" -o CuDvDr

odmdelete -q "name like hdiskpower*" -o CuVPD

odmdelete -q name=powerpath0 -o CuDv

odmdelete -q name=powerpath0 -o CuAt

odmdelete -q value3=powerpath0 -o CuDvDr

rm /dev/powerpath0

5)

Remove PowerPath software: 

/etc/rc.agent stop

installp -u EMCpower

6)

cd /dev

rm hdiskpower*

rm rhdiskpower*

7)

odmget CuAt | grep hdiskpower

odmget CuDv  | grep hdiskpower

odmget CuDvDr  | grep hdiskpower

odmget CuVPD | grep hdiskpower

odmget CuDep  | grep hdiskpower

😎

bosboot -ad /dev/ipldevice

savebase -v

Reboot

9)

Install PowerPath:

installp -agXd . EMCpower

10)

/usr/lpp/EMC/CLARiiON/bin/emc_cfgmgr

powermt config

11) Create bootlist:

    bootlist -m normal hdisk1 hdisk2 hdisk3 hdisk4

    bootlist -m normal -o

    bosboot -ad /dev/ipldevice   

(Check if dash gone).

12) pprootdev on

13) Reboot.

14) bootlist -m normal -o

Regards,

Mariano.

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kelleg
5 Tungsten

Re: IBM Power7 + Clariion + PowerPath

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Mariano,

Did your procedure fix your problem? If so, could you please mark this thread as answered - that way when someone else has a similar problem, they will be able to search and use your procedure as it is "answered".

Thanks,

glen

View solution in original post

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MaC15
2 Bronze

Re: IBM Power7 + Clariion + PowerPath

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Yes, it worked with the procedure I posted (item 5).

Done.

Thanks!

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