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Re: mpath



I see multiple boot labels, why this? Can I enable one of them. !!!

#blkid

/dev/mapper/VolGroup00-LogVol01: TYPE="swap"

/dev/mapper/VolGroup00-LogVol00: UUID="6e16f4c9-8a7a-4f4d-a1b5-a07c0f8df665"
TYPE="ext3"

/dev/mapper/mpath0p1: LABEL="/boot"
UUID="08f12bcd-3ff2-4e3b-b305-32977fa6ebea" TYPE="ext3"

/dev/sda1: LABEL="/boot" UUID="08f12bcd-3ff2-4e3b-b305-32977fa6ebea"
TYPE="ext3"

/dev/VolGroup00/LogVol01: TYPE="swap"

/dev/sdb1: LABEL="/boot" UUID="08f12bcd-3ff2-4e3b-b305-32977fa6ebea"
TYPE="ext3"

 [root intra-blade ~]# rpm -aq device-mapper-*

device-mapper-multipath-0.4.7-34.el5_5.1

device-mapper-event-1.02.39-1.el5_5.2
















On Sun, Jun 20, 2010 at 8:22 PM, Thomas von Steiger <
thomas vonsteiger bluewin ch> wrote:

> If you try to boot from replicated san lun then you have a new wwid for
> this lun because it's not the same lun where you install rhel5.
> You need to hacketihack initrd with the new wwid from the repliacted lun i
> think inside the init script.
> Then you can make a new entry in grub.conf to boot from the replicated lun.
>
> Thomas
>
> On 18.06.2010, at 20:32, madunix wrote:
>
> > I booted lately several RHEL5.1 Bladecenter servers with multipath, the
> > multipath has been implemented typing mpath during the booting
> installation
> > from CD.
> > For our disaster recovery, we found that the linux rhel5 system wont boot
> up
> > from replicated SAN LUN using device mapper multipath ... its reporting
> > kernel panic and cant e2fsck files system to continue ctrl D and type
> root
> > password ...etc
> > in order to boot the system we remounted in read/write mode and edit
> > /etc/fstab then removed the mpath dev from boot disk, the system was able
> to
> > boot
> >
> > madunix
> > --
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