Problem Mounting EMC Lun via fstab

Dominique.GARNIER at Dominique.GARNIER at
Thu Oct 18 13:43:33 UTC 2007

What version are you using?

We had exactly the same issue with Redhat 4 and PowerPath 4.5. We
managed to make it work 
correctly playing with modeprobe.conf.

It seems that they fixed the installation with PowerPath 5.0 because we
don't have to change
anything to the configuration anymore after a new PowerPath installation
since we're using it.

-----Original Message-----
From: redhat-list-bounces at
[mailto:redhat-list-bounces at] On Behalf Of Shelton, Darren
Sent: mercredi 17 octobre 2007 20:02
To: 'General Red Hat Linux discussion list'
Subject: RE: Problem Mounting EMC Lun via fstab

Powerpath is loaded via kernel mods. Have a look in
and /etc/modprobe.conf. All of my volumes are in the LVM, and i dont
any issues with those being mounted at boot, but ive not ever tried to
filesystems on the devices outside of the LVM. 


-----Original Message-----
From: redhat-list-bounces at
[mailto:redhat-list-bounces at]
On Behalf Of Chuck
Sent: Wednesday, October 17, 2007 11:40 AM
To: redhat-list at
Subject: Problem Mounting EMC Lun via fstab

I have a RHEL 5 system that is trying to mount an EMC lun during boot.
I have it set in /etc/fstab is complains that the device doesn't exist.
If I
enter the root password it puts me into a read-only filesystem where I
modify /etc/fstab. (I must boot into rescue mode using cd to fix it)

/dev/emcpowera         /u01                    ext3    defaults        0

However, if I don't mount it via fstab and wait until the system is
to mount it -- it mounts fine.

I'm guessing that powerpath is not being started early enough or its
longer than it should to initialize. Im mostly a sun guy so where
should power path be started or is it somehow called from somewhere
else? Im
not even seeing an entry in /etc/rc2.d or /etc/rc3.d that starts power
There is a script in /etc/init.d, but I cannot determine from where and
it is called, if it even is. (the script doesn't have the normal
run level config info near the top like most do) But somehow once the
is booted power path is running and the emcpowera device has been

Unfortunately I can't use native linux multipathing on this node.

Thx for any help
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