Hi Folks,
I have configured ext3 file system on SAN disks using LVM2, for SAN path
redundancy we are using EMC Powerpath 5.3 SP 1. I have enabled LVM filters so
that I can avoid duplicate path warnings when I run LVM commands.
For test purposes I am rebooting the server to make sure the file system on SAN
disk gets mounted w/o issues but apparently I am seeing issues where OS drops
to maintenance mode after not able to see the LVM file system created on SAN
disks. I commented the entries for these FS in /etc/fstab and rebooted the
machine. Once the server comes I am able to manually mount the File systems.
From my understanding, I see that Powerpath drivers/process is not started at
the moment when the OS is trying to mount the LVM FS while booting and so its
not able read the metadata information from the EMC pseudo devices since the
LVM filter which I have setup is preventing LVM to read the same metadata from
regular device path for the disk. Is there any kind of fix for this which
anybody know? I am familial with similar kind of issue in Sun Solaris OS with
Veritas Volume Manager and Powerpath and the fix in Sun Solaris-10 was to
specify kernel parameter in the system file. So is there a similar kind of
parameter in Linux too?
Appreciate everyone's time regarding this.
Thank you,
AN
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