ok it is resolved, here is what i did. since the grub has mistakenly installed on RAID drive (md0) and not on /dev/sda or /dev/sdb MBRs. however i could not understand why is that happen. i am following the same linux installation that i used to with old version it just happen to me with 6.0.5. anyways this is what i did.
Grub rescue>ls (which showed me all the devices including RAID ones) Grub rescue> ls (md/0)/ (and i found grub folder on root of md/0) Grub rescue>set root=(md/0) ("/" was their so i add it) Grub rescue>set prefix=(md/0)/grub Grub rescue> insmod normal Grub rescue> normal when i reach the prompt after root password. i run grub-install /dev/sda and grub-install /dev/sdb so both devices could be used as failover. i hope this helps others. Thanks for the support Arno and Brian. Thanks, On Fri, Aug 10, 2012 at 12:48 AM, Muhammad Yousuf Khan <sir...@gmail.com> wrote: > ok ill perform the the said instructions next day in office. but let > me share you guys some of my partitions settings. that might help to > understand the scenario more clearly. > > i have 2. 500GB of HD with raid1 set.fail-over to each other with boot > support. > > 1. /boot (raid1) > 2. Swap (raid1) > 3. root on LVM on raid1. > > so i have 3 raid devices and on 3rd one root Partition is on top of LVM > > i am using the same procedure that i use to install with debian lenny > and old squeeze but this is the first time that it showed me this > error. > > i think about the same as you suggested about using debian live CD and > install the grub manually. but there is no such command grub-install. > i found a command grub-installer. so i didnt knew how to use it. > please correct me if my limited knowledge leading me to a wrong > direction. > > > On Thu, Aug 9, 2012 at 7:53 PM, Arno Schuring <aelschur...@hotmail.com> wrote: >> Muhammad Yousuf Khan (sir...@gmail.com on 2012-08-09 16:55 +0500): >>> i just installed debian from 6.0.5 amd64 net CD. with basic options. >>> >>> installation went fine but in first boot. shows me this >>> >>> Welcome to GRUB >>> error : file not found >>> grub rescue> >> >> If memory serves me right, you need to >> rescue> set root=(hd0,1) >> >> Assuming that /boot is a separate partition, created as /dev/sda1. >> Season to taste. The grub shell has tab-completion, not sure if the >> rescue shell has the same. If the installer created one single >> partition, you may also need >> rescue> set prefix=($root)/boot/grub >> >> rescue> insmod normal >> rescue> normal >> >> And from there the regular grub commands (linux, initrd) should work. >> There may also be a command to start the menu from there (insmod >> gfxmenu?). >> >> An easier but slower solution is to boot again from the installation >> disc, start a rescue shell and re-run grub-install and update-grub. >> >> Regards, >> Arno >> >> >> -- >> To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org >> with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org >> Archive: >> http://lists.debian.org/20120809165340.4d3f0...@viper.intra.loos.site >> -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/cagwvfmm48wfms2r8k1qcide18am5fdvw6kd4kaesdzqpq1z...@mail.gmail.com