Re: fsck.ext3: No such file or directory while trying to open/dev/datavg/optOracle

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As suggested earlier, you need a new initrd which includes your san drivers.  Check your San documentation for anything including the "mkinitrd" command. You also likely missed important settings for path failure handling and retry policies, and driver settings for your hba.  Those settings are typically documented in close proximity to creating the new ramdisk. 
Sent via mobile.

-----Original Message-----
From: unix syzadmin <unixsyzadmin@xxxxxxxxx>
Sender: redhat-list-bounces@xxxxxxxxxx
Date: Wed, 31 Aug 2011 10:15:39 
To: General Red Hat Linux discussion list<redhat-list@xxxxxxxxxx>
Reply-To: General Red Hat Linux discussion list <redhat-list@xxxxxxxxxx>
Subject: Re: fsck.ext3: No such file or directory while trying to open
	/dev/datavg/optOracle

Hi,

Thanks for the reply.
My OS file-systems are created on sysvg volume group based on internal disk.
I am creating  user file-systems on datavg based on EMC SAN disk.

While in the maintenance shell I could not see any entries for datavg or its
logical volumes in /dev.

So I re-mounted the / file-system (mount -o remount,rw /); edited the
/etc/fstab and commented out all the mounts for logical volumes on the
datavg.

After this the system booted fine.

Strangely after the system booted; I see all the entries for datavg and its
logical volumes in /dev.
Also datavg is online and I can mount all file-systems  without any issues.

The filter in lvm.conf is:

# grep filter /etc/lvm/lvm.conf | grep -v '#'
    filter = [ "a/sda[1-9]$/","a/emcpower.*/","r/.*/" ]

I guess the system is having problem to recognize the powerpath disk
"emcpowera" during boot.  That is why it is not able to recognize the datavg
built on that EMC disk.  Consequently no entries found for datavg and its
logical volumes in /dev.

Since there are no entries in /dev for datavg and its logical volumes the
entries in /etc/fstab to mount them at boot is failing.

I guess I am missing some configuration step related to using EMC disk and
having it recognized during boot for mounting file-systems.

Please suggest,

Thanks,



On Wed, Aug 31, 2011 at 9:41 AM, grim76 <grim76@xxxxxxxxxx> wrote:

> On 08/31/2011 06:01 AM, unix syzadmin wrote:
> > Hi,
> >
> > We have a RHEL5.6 x86_64 server that throws the following error while
> > booting:
> >
> > fsck.ext3: No such file or directory while trying to open
> > /dev/datavg/optOracle
> > /dev/datavg/optOracle:
> > The superblock could not be read or does not describe a correct ext2
> > filesystem.  If the device is valid and it really contains an ext2
> > filesystem (and not swap or ufs or something else), then the superblock
> is
> > corrupt, and you might try running e2fsck with an alternate superblock:
> > e2ffsck -b 8193 <device>
> >
> > Before restarting the server we got a LUN from EMC allocated to this
> server.
> > We use powerpath and used the "powermt config" to detect the LUN.
> > We put the LUN to use through  regular lvm commands like pvcreate,
> vgcreate,
> > lvcreate, mkfs.ext3, mount etc.
> >
> > Please suggest / point me in the right direction.
> >
> > Thanks,
>
> You might want to look at lvm.conf.  Typically lvm looks at /dev/sda,
> /dev/sdb and so on.  What you will likely want it to do is look at the
> multipath device vs. the individual device.
>
> Just remember to test your changes prior to any reboot.  Otherwise your
> change could knock off another lvm device on the system.
>
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