Hello, thanks for the reply. actually here is what I have/did: [root@muratisik ~]# cd /xen/fedora/ [root@muratisik fedora]# ls fedora.fc4.img fedora.fc4.xen.cfg fedora.swap [root@muratisik fedora]# cat fedora.fc4.xen.cfg kernel = "/boot/vmlinuz-2.6.16-1.2080_FC5xen0" memory = 128 name = "fedora.fc4" nics = 1 dhcp = "dhcp" disk = ['file:/xen/fedora/fedora.fc4.img,sda1,w', 'file:/xen/fedora/fedora.swap,sda2,w'] root = "/dev/sda1 ro" [root@muratisik fedora]# mount -o loop fedora.fc4.img /mnt/ [root@muratisik fedora]# cat /mnt/etc/fstab # This file is edited by fstab-sync - see 'man fstab-sync' for details /dev/sda1 / ext3 defaults 1 1 /dev/sda2 none swap sw 0 0 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 [root@muratisik fedora]# umount /mnt/ [root@muratisik fedora]# xm create fedora.fc4.xen.cfg -c and the error appears: ... md: ... autorun DONE. VFS: Cannot open root device "sda1" or unknown-block(0,0) Please append a correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [<c011c42c>] panic+0x3c/0x190 [<c03c6a5c>] mount_block_root+0x19c/0x1aa [<c03c6ab3>] mount_root+0x49/0x4e [<c03c6b78>] prepare_namespace+0xc0/0xf1 [<c0102267>] init+0x23e/0x2fe [<c0102029>] init+0x0/0x2fe [<c01029ad>] kernel_thread_helper+0x5/0xb Then I changed both image's fstab to hda1 and hda2 , also editted cfg to match hdas. and I get the same error. any ideas? is there any more information (log, config, debug vs.) I can supply? have a nice day. >> >>Hello, >> >>After installing a fresh fc5, I followed >>fedoraproject.org/wiki/FedoraXenQuickstartFC5 up until >> xenguest-install.py >>part. After that point for a quick try I downloaded both fc4 and debian >>prebuilt images from jailtime.org . However both images, as I boot them >>with xm create -c {related one}.cfg , crash with this error: >> >>VFS: Cannot open root device "sda1" or unknown-block(0,0) >>Please append a correct "root=" boot option >>Kernel panic - not syncing: VFS: Unable to mount root fs on >>unknown-block(0,0) >> >>I did extensive googling and mounted the images, cheking their fstab and >>so on. Everything looks fine. But the problem is unresolved. > > Did you use the '/dev/sda1' as the root boot option in xenU config? > And the xenU fstab also used sda1? > Change they to /dev/hda1 and have a try. > >> >>Does anybody have any experiences with jailtime images? any suggestions? >>BTW my host fc5 has LVM partitioning. Very unlikely but can this have an >>effect? >> >>Have a nice day. >> >> >>-- >>Murat Isik >>www.bilgiguvenlik.com >> >>-- > > > Best Regards, > Yongkang (Kangkang) ÓÀ¿µ >