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<TITLE>[dm-devel] Boot from SAN with device-mapper-multipath device</TITLE>
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<P><FONT SIZE=2 FACE="Arial">Hi,</FONT>
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<P><FONT SIZE=2 FACE="Arial">I am trying boot from SAN with DM-multipath devices as a root device. My initrd images contains following files :</FONT>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/multipath.conf</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/scsi_id.config</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/devices</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/scripts</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/scripts/ide-media.sh</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/scripts/check-cdrom.sh</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/scripts/MAKEDEV.dev</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/scripts/pam_console.dev</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/scripts/hotplug.dev</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/permissions.d</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/permissions.d/50-udev.permissions</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/rules.d</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/rules.d/40-multipath.rules</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./etc/udev/rules.d/50-udev.rules</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./init</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./sys</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./proc</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./sysroot</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./cpio</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./loopfs</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./dev</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./dev/tty2</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./dev/console</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./dev/tty4</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./dev/tty1</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./dev/ram</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./dev/tty3</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./dev/null</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./dev/systty</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./sbin</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">/bin</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./bin/insmod</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./bin/multipath</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./bin/modprobe</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./bin/udevstart</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./bin/hotplug</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./bin/dmsetup</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./bin/scsi_id</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./bin/nash</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./bin/udev</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./bin/kpartx</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/dm-multipath.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/qla2300.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/scsi_mod.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/multipath.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/scsi_transport_fc.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/dm-round-robin.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/ext3.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/dm-zero.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/jbd.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/qla2xxx.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/sd_mod.ko</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial">./lib/dm-mod.ko</FONT></I>
</P>
<P><FONT SIZE=2 FACE="Arial">My /boot/grub/menu.lst looks like</FONT>
<BR><I><FONT SIZE=2 FACE="Arial">title RHEL4 U4 -SANBOOT </FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial"> root (hd0,0)</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial"> kernel /vmlinuz ro root=/dev/mapper/3600508b400102be10000100023750000p2 rhgb quiet</FONT></I>
<BR><I><FONT SIZE=2 FACE="Arial"> initrd /initrdsb</FONT></I>
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<P><FONT SIZE=2 FACE="Arial">But during the boot time I am getting "kernel panic" with message as "mount: error mounting ext3 ". Please let me know if Device-Mapper multipath can claim the system disk for creating dm device ? </FONT></P>
<P><FONT SIZE=2 FACE="Arial">Thanks and Regards,</FONT>
<BR><FONT SIZE=2 FACE="Arial">Vijay</FONT>
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