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clangard22
44 Posts
0
442
May 11th, 2007 08:00
Powerpath on linux with only one HBA card
Hello,
Find below Environment :
Clariion CX700
Powerpath 4.4.0-343
RHEL 4.0 : noyau 2.6.9-5
DELL PowerEdge 2850
only 1 FC QLA2340 on 2 sp by SAN McDATA.
We don't use volume manager.
I have several question :
1) A this time, Powerpath was installed to manage The way beetween the two sp.
If I uninstall Powerpath How is managed the balancing beetween the two SP? automatically by the CX700? What appens for the operating system if there is a crash of one SP?
2) How I can uninstall Powerpath?
3) We have a lot of server crash. We don't know what is teh problem.
The support DELL doesn't know too.
Then we Thinking maybe it's a problem with Powerpath.
Do you know if there is parameter to adjust with Powerpath and Linuw?
Find below Environment :
Clariion CX700
Powerpath 4.4.0-343
RHEL 4.0 : noyau 2.6.9-5
DELL PowerEdge 2850
only 1 FC QLA2340 on 2 sp by SAN McDATA.
We don't use volume manager.
I have several question :
1) A this time, Powerpath was installed to manage The way beetween the two sp.
If I uninstall Powerpath How is managed the balancing beetween the two SP? automatically by the CX700? What appens for the operating system if there is a crash of one SP?
2) How I can uninstall Powerpath?
3) We have a lot of server crash. We don't know what is teh problem.
The support DELL doesn't know too.
Then we Thinking maybe it's a problem with Powerpath.
Do you know if there is parameter to adjust with Powerpath and Linuw?
JasonBailey
147 Posts
122
0
Posted May 12th, 2007 15:00
I would not accept an answer "don't know". If you are
paying maintenance to Dell ..they need to give you
some idea what's going on. Have they collected logs
?
If you are suspecting PowerPath is the problem, have
Dell escalate this to EMC. They are partners and if
Dell can't figure it out ..they will get EMC involved.
Agree. There are escalation paths which are designed to eliminate a "don't know" situation.
dynamox
11 Legend
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20419 Posts
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87439 Points
122
0
Posted May 11th, 2007 10:00
way beetween the two sp.
If I uninstall Powerpath How is managed the balancing
beetween the two SP? automatically by the CX700? What
appens for the operating system if there is a crash
of one SP?
If you uninstall PowePath, you can still provide failover during SP failure by enabling "Auto assign" feature on the LUNs presented to this host. If you are not happy with PowerPath, take a look at DM-MPIO which is a built-in failover software provided by Redhat.
It depends, are you using powerpath devices for your mount points ?
for example: /dev/emcpowera
if you are using powerpath devices, than you will have some re-configuration to do, fix your mount points, fix your fstab ..etc
3) We have a lot of server crash. We don't know what
is teh problem.
The support DELL doesn't know too.
Then we Thinking maybe it's a problem with
Powerpath.
Do you know if there is parameter to adjust with
Powerpath and Linuw?
I would not accept an answer "don't know". If you are paying maintenance to Dell ..they need to give you some idea what's going on. Have they collected logs ?
If you are suspecting PowerPath is the problem, have Dell escalate this to EMC. They are partners and if Dell can't figure it out ..they will get EMC involved.