Date: Fri, 7 Aug 2009 17:09:49 +0200 From: =?ISO-8859-1?Q?Olivier_Cochard=2DLabb=E9?= <olivier@cochard.me> To: freebsd-embedded@freebsd.org Subject: [NanoBSD] Can't use boot0cfg for changing the booting slice Message-ID: <3131aa530908070809l2ac13931xf65981db6eeb83e8@mail.gmail.com>
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Hi,
I meet a problem under FreeBSD 7.2 and 8.0-current (nanoBSD) using
boot0cfg: I can't use boot0cfg for changing the booting slice.
Here is my problem:
I'm using the FreeBSD Boot manager on a system with MBR partitions.
The active slice is the partition 1, but I want to boot from the slice 2.
Then I use boot0cfg like that:
sysctl kern.geom.debugflags=16
boot0cfg -s 2 -v /dev/ad0
sysctl kern.geom.debugflags=0
But, after the reboot my system still reboot from the slice 1 (but the
boot loader show correctly that the default choice is now the 2)!
Where is my problem ?
The "active" flag of the slice is not modified after using boot0cfg, is normal ?
Here is the full log:
[root@router]~#fdisk /dev/ad0
******* Working on device /dev/ad0 *******
parameters extracted from in-core disklabel are:
cylinders=968 heads=16 sectors/track=63 (1008 blks/cyl)
parameters to be used for BIOS calculations are:
cylinders=968 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 465822 (227 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 28/ head 254/ sector 63
The data for partition 2 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 465948, size 465822 (227 Meg), flag 0
beg: cyl 29/ head 1/ sector 1;
end: cyl 57/ head 254/ sector 63
The data for partition 3 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 931770, size 16065 (7 Meg), flag 0
beg: cyl 58/ head 0/ sector 1;
end: cyl 58/ head 254/ sector 63
The data for partition 4 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 947835, size 16065 (7 Meg), flag 0
beg: cyl 59/ head 0/ sector 1;
end: cyl 59/ head 254/ sector 63
[root@router]~#sysctl kern.geom.debugflags=16
kern.geom.debugflags: 0 -> 16
[root@router]~#boot0cfg -s 2 -v /dev/ad0
# flag start chs type end chs offset size
1 0x80 0: 1: 1 0xa5 28:254:63 63 465822
2 0x00 29: 1: 1 0xa5 57:254:63 465948 465822
3 0x00 58: 0: 1 0xa5 58:254:63 931770 16065
4 0x00 59: 0: 1 0xa5 59:254:63 947835 16065
version=1.0 drive=0x80 mask=0x3 ticks=182 bell=# (0x23)
options=packet,update,nosetdrv
default_selection=F2 (Slice 2)
[root@router]~#sysctl kern.geom.debugflags=0
kern.geom.debugflags: 16 -> 0
[root@router]~#fdisk /dev/ad0
******* Working on device /dev/ad0 *******
parameters extracted from in-core disklabel are:
cylinders=968 heads=16 sectors/track=63 (1008 blks/cyl)
parameters to be used for BIOS calculations are:
cylinders=968 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 465822 (227 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 28/ head 254/ sector 63
The data for partition 2 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 465948, size 465822 (227 Meg), flag 0
beg: cyl 29/ head 1/ sector 1;
end: cyl 57/ head 254/ sector 63
The data for partition 3 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 931770, size 16065 (7 Meg), flag 0
beg: cyl 58/ head 0/ sector 1;
end: cyl 58/ head 254/ sector 63
The data for partition 4 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 947835, size 16065 (7 Meg), flag 0
beg: cyl 59/ head 0/ sector 1;
end: cyl 59/ head 254/ sector 63
Thanks,
Olivier
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