thanks for the knowledge abt top/bottom/interleaved posting ( thanks for your polite reply :) ) ok .. [root@localhost onkar]# mount /dev/sda1 on / type ext3 (rw) none on /proc type proc (rw) none on /sys type sysfs (rw) none on /dev/pts type devpts (rw,gid=5,mode=620) usbfs on /proc/bus/usb type usbfs (rw) none on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) [root@localhost onkar]# cat /etc/fstab # This file is edited by fstab-sync - see 'man fstab-sync' for details LABEL=/ / ext3 defaults 1 1 none /dev/pts devpts gid=5,mode=620 0 0 none /dev/shm tmpfs defaults 0 0 none /proc proc defaults 0 0 none /sys sysfs defaults 0 0 LABEL=SWAP-sda2 swap swap defaults 0 0 /dev/hdc /media/cdrecorder auto pamconsole,fscontext=system_u:object_r:removable_t,exec,noauto,managed 0 0 /dev/fd0 /media/floppy auto pamconsole,fscontext=system_u:object_r:removable_t,exec,noauto,managed 0 0 [root@localhost onkar]# cat /boot/grub/grub.conf # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You do not have a /boot partition. This means that # all kernel and initrd paths are relative to /, eg. # root (hd0,0) # kernel /boot/vmlinuz-version ro root=/dev/sda1 # initrd /boot/initrd-version.img #boot=/dev/sda default=1 timeout=5 splashimage=(hd0,0)/boot/grub/splash.xpm.gz hiddenmenu title Red Hat Enterprise Linux AS (2.6.12.6) root (hd0,0) # kernel /boot/vmlinuz-2.6.12.6 ro root=LABEL=/ rhgb quiet kernel /boot/vmlinuz-2.6.12.6 ro root=/dev/sda1 initrd /boot/initrd-2.6.12.6.img title Red Hat Enterprise Linux AS (2.6.9-42.0.10.EL_lustre.1.4.10smp) root (hd0,0) kernel /boot/vmlinuz-2.6.9-42.0.10.EL_lustre.1.4.10smp ro root=LABEL=/ rhgb quiet initrd /boot/initrd-2.6.9-42.0.10.EL_lustre.1.4.10smp.img title Red Hat Enterprise Linux AS (2.6.9-5.EL) root (hd0,0) kernel /boot/vmlinuz-2.6.9-5.EL ro root=LABEL=/ rhgb quiet initrd /boot/initrd-2.6.9-5.EL.img with this :: ----------------------------------------------RESULT OF REBOOTING----------------------------- :::::::::::: :::::::::::: lot of stuff goes here :::::::::::: :::::::::::: [4294671,594000] VFS: Cannot open root device "sad1" or unknown-block(0,0) [4294671,594000] Please append a correct "root=" boot option [4294671,594000] Kernel panic -not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [4294671,594000]_ hang !!! ------------------------------------------------------------------------------------------------------------------- can you suggest me anything else. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ