Remove GRUB?
Hello, I was experimenting with the GRUB bootloader and would now like to remove it. Something went wrong and I must now use a bootable CD that gives me an option to boot to the first partition and the system boots fine. man bsdlabel gives: Installing Bootstraps If the -B argument is specified, bootstrap code will be read from the file /boot/boot and written to the disk. Assuming that this affects the mbr of the who drive, I tried: localhost# bsdlabel -B /dev/ad0 localhost# bsdlabel: /dev/ad0: no valid label found No problem, let's try the root partition: bsdlabel -B /dev/da0s1a No error, it blinked the hard drive activity light and appears to have done something but alas, it still reports a GRUB error 21 rather than given any sign of the FreeBSD loader. Any pointers to the rescue/install procedures applicable to this? Best regards, Michael Dexter ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Remove GRUB?
At 03:25 AM 7/19/2005, Michael Dexter wrote: Hello, I was experimenting with the GRUB bootloader and would now like to remove it. Something went wrong and I must now use a bootable CD that gives me an option to boot to the first partition and the system boots fine. man bsdlabel gives: Installing Bootstraps If the -B argument is specified, bootstrap code will be read from the file /boot/boot and written to the disk. Assuming that this affects the mbr of the who drive, I tried: localhost# bsdlabel -B /dev/ad0 localhost# bsdlabel: /dev/ad0: no valid label found No problem, let's try the root partition: bsdlabel -B /dev/da0s1a No error, it blinked the hard drive activity light and appears to have done something but alas, it still reports a GRUB error 21 rather than given any sign of the FreeBSD loader. Any pointers to the rescue/install procedures applicable to this? Did you use fdisk to check and see if the first slice is marked as active? Here's a sample from one of my systems: Media sector size is 512 Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: The data for partition 1 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 63, size 10474317 (5114 Meg), flag 80 (active) beg: cyl 0/ head 1/ sector 1; end: cyl 651/ head 254/ sector 63 The data for partition 2 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 10474380, size 10458315 (5106 Meg), flag 0 beg: cyl 652/ head 0/ sector 1; end: cyl 1023/ head 254/ sector 63 The data for partition 3 is: UNUSED The data for partition 4 is: UNUSED note the flag 80 in the first entry. -Glenn Best regards, Michael Dexter ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Remove GRUB?
I was experimenting with the GRUB bootloader and would now like to remove it. Something went wrong and I must now use a bootable CD that gives me an option to boot to the first partition and the system boots fine. man bsdlabel gives: Installing Bootstraps If the -B argument is specified, bootstrap code will be read from the file /boot/boot and written to the disk. Assuming that this affects the mbr of the who drive, I tried: localhost# bsdlabel -B /dev/ad0 localhost# bsdlabel: /dev/ad0: no valid label found No problem, let's try the root partition: bsdlabel -B /dev/da0s1a No error, it blinked the hard drive activity light and appears to have done something but alas, it still reports a GRUB error 21 rather than given any sign of the FreeBSD loader. Any pointers to the rescue/install procedures applicable to this? Did you use fdisk to check and see if the first slice is marked as active? Here's a sample from one of my systems: Media sector size is 512 Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: The data for partition 1 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 63, size 10474317 (5114 Meg), flag 80 (active) beg: cyl 0/ head 1/ sector 1; end: cyl 651/ head 254/ sector 63 The data for partition 2 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 10474380, size 10458315 (5106 Meg), flag 0 beg: cyl 652/ head 0/ sector 1; end: cyl 1023/ head 254/ sector 63 The data for partition 3 is: UNUSED The data for partition 4 is: UNUSED note the flag 80 in the first entry. The results appear similar: localhost# fdisk ad0 *** Working on device /dev/ad0 *** parameters extracted from in-core disklabel are: cylinders=155061 heads=16 sectors/track=63 (1008 blks/cyl) Figures below won't work with BIOS for partitions not in cyl 1 parameters to be used for BIOS calculations are: cylinders=155061 heads=16 sectors/track=63 (1008 blks/cyl) Media sector size is 512 Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: The data for partition 1 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 63, size 81915372 (39997 Meg), flag 80 (active) beg: cyl 0/ head 1/ sector 1; end: cyl 1023/ head 254/ sector 63 The data for partition 2 is: sysid 131 (0x83),(Linux native) start 81915435, size 61432560 (29996 Meg), flag 0 beg: cyl 1023/ head 255/ sector 63; end: cyl 1023/ head 254/ sector 63 The data for partition 3 is: sysid 130 (0x82),(Linux swap or Solaris x86) start 143347995, size 12948390 (6322 Meg), flag 0 beg: cyl 1023/ head 255/ sector 63; end: cyl 1023/ head 254/ sector 63 The data for partition 4 is: UNUSED localhost# On a related note, once working, how does one configure the FreeBSD loader to give the Linux partition as an option? It seems to have happened automagically in the past. Thanks, Michael. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Remove GRUB?
Glenn's suggestion of fdisk lead me to bring up the fdisk man page, which points to boot0cfg(8). Perhaps this is the utility I am after? Michael. At 03:25 AM 7/19/2005, Michael Dexter wrote: Hello, I was experimenting with the GRUB bootloader and would now like to remove it. Something went wrong and I must now use a bootable CD that gives me an option to boot to the first partition and the system boots fine. man bsdlabel gives: Installing Bootstraps If the -B argument is specified, bootstrap code will be read from the file /boot/boot and written to the disk. Assuming that this affects the mbr of the who drive, I tried: localhost# bsdlabel -B /dev/ad0 localhost# bsdlabel: /dev/ad0: no valid label found No problem, let's try the root partition: bsdlabel -B /dev/da0s1a No error, it blinked the hard drive activity light and appears to have done something but alas, it still reports a GRUB error 21 rather than given any sign of the FreeBSD loader. Any pointers to the rescue/install procedures applicable to this? Did you use fdisk to check and see if the first slice is marked as active? Here's a sample from one of my systems: Media sector size is 512 Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: The data for partition 1 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 63, size 10474317 (5114 Meg), flag 80 (active) beg: cyl 0/ head 1/ sector 1; end: cyl 651/ head 254/ sector 63 The data for partition 2 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 10474380, size 10458315 (5106 Meg), flag 0 beg: cyl 652/ head 0/ sector 1; end: cyl 1023/ head 254/ sector 63 The data for partition 3 is: UNUSED The data for partition 4 is: UNUSED note the flag 80 in the first entry. -Glenn Best regards, Michael Dexter ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Remove GRUB?
Michael Dexter [EMAIL PROTECTED] wrote: I was experimenting with the GRUB bootloader and would now like to remove it. Something went wrong and I must now use a bootable CD that gives me an option to boot to the first partition and the system boots fine. man bsdlabel gives: Installing Bootstraps If the -B argument is specified, bootstrap code will be read from the file /boot/boot and written to the disk. Assuming that this affects the mbr of the who drive, I tried: localhost# bsdlabel -B /dev/ad0 localhost# bsdlabel: /dev/ad0: no valid label found No problem, let's try the root partition: bsdlabel -B /dev/da0s1a No error, it blinked the hard drive activity light and appears to have done something but alas, it still reports a GRUB error 21 rather than given any sign of the FreeBSD loader. Any pointers to the rescue/install procedures applicable to this? Did you use fdisk to check and see if the first slice is marked as active? Here's a sample from one of my systems: Media sector size is 512 Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: The data for partition 1 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 63, size 10474317 (5114 Meg), flag 80 (active) beg: cyl 0/ head 1/ sector 1; end: cyl 651/ head 254/ sector 63 The data for partition 2 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 10474380, size 10458315 (5106 Meg), flag 0 beg: cyl 652/ head 0/ sector 1; end: cyl 1023/ head 254/ sector 63 The data for partition 3 is: UNUSED The data for partition 4 is: UNUSED note the flag 80 in the first entry. The results appear similar: localhost# fdisk ad0 *** Working on device /dev/ad0 *** parameters extracted from in-core disklabel are: cylinders=155061 heads=16 sectors/track=63 (1008 blks/cyl) Figures below won't work with BIOS for partitions not in cyl 1 parameters to be used for BIOS calculations are: cylinders=155061 heads=16 sectors/track=63 (1008 blks/cyl) Media sector size is 512 Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: The data for partition 1 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 63, size 81915372 (39997 Meg), flag 80 (active) beg: cyl 0/ head 1/ sector 1; end: cyl 1023/ head 254/ sector 63 The data for partition 2 is: sysid 131 (0x83),(Linux native) start 81915435, size 61432560 (29996 Meg), flag 0 beg: cyl 1023/ head 255/ sector 63; end: cyl 1023/ head 254/ sector 63 The data for partition 3 is: sysid 130 (0x82),(Linux swap or Solaris x86) start 143347995, size 12948390 (6322 Meg), flag 0 beg: cyl 1023/ head 255/ sector 63; end: cyl 1023/ head 254/ sector 63 The data for partition 4 is: UNUSED localhost# On a related note, once working, how does one configure the FreeBSD loader to give the Linux partition as an option? It seems to have happened automagically in the past. Are you sure you are talking about the boot loader, not the boot manager? I'd say boot0cfg is what you need. Fabian -- http://www.fabiankeil.de/ pgpUrF16ZDDBd.pgp Description: PGP signature
Re: Remove GRUB?
Are you sure you are talking about the boot loader, not the boot manager? I'd say boot0cfg is what you need. Fabian Fabian makes a good point but the goal is to be rid of GRUB. I ran 'boot0cfg -Bv ad0' (Bootstrap and verbosity) And on boot I get a more comforting: F1 FreeBSD F2 Linux F3 ?? Looks perfect but unfortunately, F1, F2 and F3 are ingored until the keyboard buffer fills up beep beep beep... but fortunately it then goes to the boot prompt with beastie after a long timeout. Thoughts? Thanks to all who helped. Michael. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
