Hi All, Yes, I tried the steps and it worked for me. Thanks for your help. Regards, Pradipmaya. On Jan 6, 2008 11:38 PM, Hannes Reinecke <hare@xxxxxxx> wrote: > Chandra Seetharaman wrote: > > I am working on a multipath usage document. Attached is the installation > > section of that document. > > > > Note that it is written for RHEL5 U1 and SLES10 SP1. > > > > Good Luck, > > > > chandra > > > > On Wed, 2007-12-19 at 13:02 -0800, Pradipmaya Maharana wrote: > >> Hi All, > >> > >> Is there a process/document that talks about how to configure > >> root/boot device for multipath? > >> > >> Thanks and Regards, > >> Pradipmaya. > >> > >> -- > >> dm-devel mailing list > >> dm-devel@xxxxxxxxxx > >> https://www.redhat.com/mailman/listinfo/dm-devel > >> > >> ------------------------------------------------------------------------ > >> > >> 4.1. Installation instructions for SLES10 > >> > >> Note: This is tested on SLES10 SP1. If you have any other version, your > >> mileage may vary. > >> > >> 1. Install the OS in a device that has multiple paths. Make sure the > >> root device's "Mount by" option is set to "Device by-id" (this option is > >> available under "expert partitioner" as "fstab options"). > >> 2. Complete the installation. Let the system boot up in multiuser mode. > >> Make sure the root device, swap device are all referenced by their by-id > >> device node entries instead of /dev/sd* type names. If they are not, fix > >> them first. > >> 3. Once booted, update /etc/multipath.conf If you have to make changes > >> to /etc/multipath.conf, make the changes. > >> Note: the option "user_friendly_names" is not supported by initrd. > >> So, if you have user_friendly_names in your /etc/multipath.conf file, > >> comment it for now, you can uncomment it later. > >> 4. Enable multipathing by running the following commands > >> * chkconfig boot.multipath on > >> > >> * chkconfig multipathd on > >> 5. Add multipath module to initrd > >> > >> Edit the file /etc/sysconfig/kernel and add "dm-multipath" to > >> INITRD_MODULES". Note: If your storage devices needs a hardware handler, > >> add the corresponding module to INITRD_MODULES, in addition to > >> "dm-multipath". For example add "dm-rdac" and "dm-multipath" to support > >> IBM's DS4K storage devices > >> 6. Run mkinitrd > >> Note: You can uncomment the user friendly name if you have commented it above. > >> 7. Reboot > >> > >> The system will come up with the root disk on a multipathed device. > >> > >> Note: You can switch off multipathing to the root device by adding > >> multipath=off to the kernel command line. > >> > ACK. This is the correct way. > > Thanks for writing this up. > > Cheers, > > Hannes > -- > Dr. Hannes Reinecke zSeries & Storage > hare@xxxxxxx +49 911 74053 688 > SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg > GF: Markus Rex, HRB 16746 (AG Nürnberg) > > > -- > dm-devel mailing list > dm-devel@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/dm-devel > -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
