Re: [gentoo-user] VFS: Cannot open root device hda6 or unknown-block(3,6)
On Wednesday 27 December 2006 01:38, Mick wrote: On Tuesday 26 December 2006 18:26, Bruce Burden wrote: You can use tab auto-completion in grub to see what drives and partitions are identified as. Also, I need to know how to change the Windows partition so that Windows believe it is the first disk, otherwise it will not boot. That's right, it won't. You need the map command in your grub.conf: map (hd0) (hd1) map (hd1) (hd0) WinXP will now think that it is on the first disk and it will boot happily. I recently had that message because I changed a partition's file system to ext3 and ext3 was neither compiled into the kernel nor in the initrd file. In this case, I think the USB Mass Storage module will need to be available plus the SCSI support. HTH -Robin. -- -- Robin Atwood -- -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] VFS: Cannot open root device hda6 or unknown-block(3,6)
Funny. From kernel 2.6.18 on I receive this message when cold-booting my (linux only) notebook. On second try, it all works well. Disk geometry and partitioning has not been changed. I guess a bug in kernel. Alle Wednesday 27 December 2006 09:45, Robin Atwood ha scritto: On Wednesday 27 December 2006 01:38, Mick wrote: On Tuesday 26 December 2006 18:26, Bruce Burden wrote: You can use tab auto-completion in grub to see what drives and partitions are identified as. Also, I need to know how to change the Windows partition so that Windows believe it is the first disk, otherwise it will not boot. That's right, it won't. You need the map command in your grub.conf: map (hd0) (hd1) map (hd1) (hd0) WinXP will now think that it is on the first disk and it will boot happily. I recently had that message because I changed a partition's file system to ext3 and ext3 was neither compiled into the kernel nor in the initrd file. In this case, I think the USB Mass Storage module will need to be available plus the SCSI support. HTH -Robin. -- -- Robin Atwood -- -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] VFS: Cannot open root device hda6 or unknown-block(3,6)
didn't you separate your boot partition from / ? -- root (hd1,5) this indicates your BOOT partition (/boot) is located at /dev/hdb6 -- kernel /boot/linux-2.6.15-gentoo-r1 root=/dev/hda6 this indicates your ROOT partition ( your / ) locates at /dev/hda6, is is possible? On 12/26/06, Bruce Burden [EMAIL PROTECTED] wrote: Hi gang, I have a laptop, originally with Windows. I partitioned the windows space, and installed Gentoo. Fine and well. Then I replaced the original hard drive with a new one, and moved the windoze/Gentoo drive to a USB enclosure. I changed the drive specs from hda0,x to hda1,x, and attempted to boot Gentoo in single user mode, by appending a 1 to the GRUB string. That seemed to work, but eventually the process fails with the: VFS: Cannot open root device hda6 or unknown-block(3,6) message above. Googling about tells me that perhaps the SCSI or the USB subsystems may not be loaded, and that is why the boot process fails. One recommendation was the change the /dev/hdaX notation for the device numerical notation, ie root=0x802. Now, I have not (quickly) found the numerical notation, although I did encounter it once upon a time previously. Does this seem like the correct approach? If so, what would be the correct notation for the second drive? As I recall, 0x800 was a SCSI notation? My GRUB is: default 0 timeout 8 splashimage=(hd1,5)/boot/grub/splash.xpm.gz title Gentoo Linux 2.6.15 root (hd1,5) kernel /boot/linux-2.6.15-gentoo-r1 root=/dev/hda6 title Windows root (hd1,0) makeactive chainloader +1 title Failsafe -- Gentoo Linux 2.6.12 kernel (hd1,5)/boot/vmlinuz root=/dev/hda6 showopts ide=nodma apm=off acpi=off vga=nor mal noresume selinux=0 barrier=off nosmp noapic maxcpus=0 3 initrd (hd1,5)/boot/initrd and all I have really done is change hd1,X, where originally I had hda0,X... I would also like to be able to boot into windoze, and currently all it does is return to the GRUB menu, so clearly something isn't right... Thank you, Bruce -- I like bad! Bruce BurdenAustin, TX. - Thuganlitha The Power and the Prophet Robert Don Hughes -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] VFS: Cannot open root device hda6 or unknown-block(3,6)
Hi, If it's in a USB enclosure, you need your /boot to be in a partition on your main disk (the one inside of the laptop), if I'm not mistaking, Fei seams to think so too. The hda* is now an sda* (or sdb*, sdc*, etc) because usb storage stuff emulates scsi. Gabriel Bruce Burden wrote: Hi gang, I have a laptop, originally with Windows. I partitioned the windows space, and installed Gentoo. Fine and well. Then I replaced the original hard drive with a new one, and moved the windoze/Gentoo drive to a USB enclosure. I changed the drive specs from hda0,x to hda1,x, and attempted to boot Gentoo in single user mode, by appending a 1 to the GRUB string. That seemed to work, but eventually the process fails with the: VFS: Cannot open root device hda6 or unknown-block(3,6) message above. Googling about tells me that perhaps the SCSI or the USB subsystems may not be loaded, and that is why the boot process fails. One recommendation was the change the /dev/hdaX notation for the device numerical notation, ie root=0x802. Now, I have not (quickly) found the numerical notation, although I did encounter it once upon a time previously. Does this seem like the correct approach? If so, what would be the correct notation for the second drive? As I recall, 0x800 was a SCSI notation? My GRUB is: default 0 timeout 8 splashimage=(hd1,5)/boot/grub/splash.xpm.gz title Gentoo Linux 2.6.15 root (hd1,5) kernel /boot/linux-2.6.15-gentoo-r1 root=/dev/hda6 title Windows root (hd1,0) makeactive chainloader +1 title Failsafe -- Gentoo Linux 2.6.12 kernel (hd1,5)/boot/vmlinuz root=/dev/hda6 showopts ide=nodma apm=off acpi=off vga=nor mal noresume selinux=0 barrier=off nosmp noapic maxcpus=0 3 initrd (hd1,5)/boot/initrd and all I have really done is change hd1,X, where originally I had hda0,X... I would also like to be able to boot into windoze, and currently all it does is return to the GRUB menu, so clearly something isn't right... Thank you, Bruce -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] VFS: Cannot open root device hda6 or unknown-block(3,6)
Hi Fei, On Tue, Dec 26, 2006 at 05:35:59PM +0800, fei huang wrote: didn't you separate your boot partition from / ? -- root (hd1,5) this indicates your BOOT partition (/boot) is located at /dev/hdb6 Originally, this would have been: root(hd0,5) -- kernel /boot/linux-2.6.15-gentoo-r1 root=/dev/hda6 this indicates your ROOT partition ( your / ) locates at /dev/hda6, is is possible? while I have not changed this line. /boot is part of the / heirarchy, which is on /dev/hda6 assuming the disk is an IDE disk in the laptop. What I have is: IDE: FreeBSD, with FreeBSD MBR USB enclosure: first 2 partitions Windows hda5 - SWAP hda6 - / hda7 - /var hda8 - /usr hda9 - /tmp hda10 - /usr/src hda11 - /usr/portage hda12 - /home GRUB is instaled in MBR. Now, on boot, the FreeBSD bootloader gets me to the GRUB loader on the USB drive. What I believe I need to know is how to remap the partitions on the original IDE drive to SCSI partitions, because that drive is now in the USB enclosure. Also, I need to know how to change the Windows partition so that Windows believe it is the first disk, otherwise it will not boot. Bruce -- I like bad! Bruce BurdenAustin, TX. - Thuganlitha The Power and the Prophet Robert Don Hughes -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] VFS: Cannot open root device hda6 or unknown-block(3,6)
On Tuesday 26 December 2006 18:26, Bruce Burden wrote: Hi Fei, On Tue, Dec 26, 2006 at 05:35:59PM +0800, fei huang wrote: didn't you separate your boot partition from / ? -- root (hd1,5) this indicates your BOOT partition (/boot) is located at /dev/hdb6 Originally, this would have been: root(hd0,5) -- kernel /boot/linux-2.6.15-gentoo-r1 root=/dev/hda6 this indicates your ROOT partition ( your / ) locates at /dev/hda6, is is possible? while I have not changed this line. /boot is part of the / heirarchy, which is on /dev/hda6 assuming the disk is an IDE disk in the laptop. What I have is: IDE: FreeBSD, with FreeBSD MBR USB enclosure: first 2 partitions Windows hda5 - SWAP hda6 - / hda7 - /var hda8 - /usr hda9 - /tmp hda10 - /usr/src hda11 - /usr/portage hda12 - /home GRUB is instaled in MBR. Now, on boot, the FreeBSD bootloader gets me to the GRUB loader on the USB drive. What I believe I need to know is how to remap the partitions on the original IDE drive to SCSI partitions, because that drive is now in the USB enclosure. You can use tab auto-completion in grub to see what drives and partitions are identified as. Also, I need to know how to change the Windows partition so that Windows believe it is the first disk, otherwise it will not boot. That's right, it won't. You need the map command in your grub.conf: map (hd0) (hd1) map (hd1) (hd0) WinXP will now think that it is on the first disk and it will boot happily. -- Regards, Mick pgprxLrJlgKvi.pgp Description: PGP signature
[gentoo-user] VFS: Cannot open root device hda6 or unknown-block(3,6)
Hi gang, I have a laptop, originally with Windows. I partitioned the windows space, and installed Gentoo. Fine and well. Then I replaced the original hard drive with a new one, and moved the windoze/Gentoo drive to a USB enclosure. I changed the drive specs from hda0,x to hda1,x, and attempted to boot Gentoo in single user mode, by appending a 1 to the GRUB string. That seemed to work, but eventually the process fails with the: VFS: Cannot open root device hda6 or unknown-block(3,6) message above. Googling about tells me that perhaps the SCSI or the USB subsystems may not be loaded, and that is why the boot process fails. One recommendation was the change the /dev/hdaX notation for the device numerical notation, ie root=0x802. Now, I have not (quickly) found the numerical notation, although I did encounter it once upon a time previously. Does this seem like the correct approach? If so, what would be the correct notation for the second drive? As I recall, 0x800 was a SCSI notation? My GRUB is: default 0 timeout 8 splashimage=(hd1,5)/boot/grub/splash.xpm.gz title Gentoo Linux 2.6.15 root (hd1,5) kernel /boot/linux-2.6.15-gentoo-r1 root=/dev/hda6 title Windows root (hd1,0) makeactive chainloader +1 title Failsafe -- Gentoo Linux 2.6.12 kernel (hd1,5)/boot/vmlinuz root=/dev/hda6 showopts ide=nodma apm=off acpi=off vga=nor mal noresume selinux=0 barrier=off nosmp noapic maxcpus=0 3 initrd (hd1,5)/boot/initrd and all I have really done is change hd1,X, where originally I had hda0,X... I would also like to be able to boot into windoze, and currently all it does is return to the GRUB menu, so clearly something isn't right... Thank you, Bruce -- I like bad! Bruce BurdenAustin, TX. - Thuganlitha The Power and the Prophet Robert Don Hughes -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] VFS: Cannot open root device hda6 or unknown-block(3,6)
Bruce Burden wrote: title Gentoo Linux 2.6.15 root (hd1,5) kernel /boot/linux-2.6.15-gentoo-r1 root=/dev/hda6 Thank you, Bruce Shouldn't you have changed the root= line to hdb instead of hda? Not sure, but worth looking at. Dale :-) :-) :-) -- www.myspace.com/dalek1967 -- gentoo-user@gentoo.org mailing list
