How to boot new kernel

[Igor V. Ruzanov]

On Mon, 12 Dec 2011, Коньков Евгений wrote:

|
|   HI, krad.
|
|   How I can figure out the correspondence of bios drive number and
|   freebsd numbering?
|
|   >
|
|   Have a look at boot.config file you should be able to do something
|   there
|
|   On Dec 11, 2011 8:57 PM, "Kon'kov Evgenij" <[1]kes-kes at yandex.ru>
|   wrote:
|
|   Hi Freebsd-questions.
|
|   In system two disks now:
|
|   # kenv | grep dev
|
|   currdev="disk1s1a:"
|
|   loaddev="disk1s1a:"
|
|   loader_conf_files="/boot/device.hints /boot/loader.conf
|   /boot/loader.conf.local"
|
|   vfs.root.mountfrom="ufs:/dev/ad8s1a"
|
|   kern.devalias.ada0="ad4"
|
|   kern.devalias.ada1="ad8"
|
|   one was with installed FreeBSD (ad4) and second is empty (ad8)
|
|   I install new system to ad8 and add to (ad4) /boot/loader.conf next
|   line:
|
|   vfs.root.mountfrom="ufs:/dev/ad8s1a"
|
|   so next time I booted from second hdd.
|
|   But now I have problem.
|
|   How to boot kernel from second device instead of first one.
|
|   BIOS starts to run loader from first device (ad4) and kernel is booted
|
|   from it but all other is mounted from (ad8)
|
|   # df -h
|
|   Filesystem     Size    Used   Avail Capacity  Mounted on
|
|   /dev/ad8s1a      1G    117M    809M    13%    /
|
|   devfs          1.0k    1.0k      0B   100%    /dev
|
|   /dev/ad8s1e      1G    267M    660M    29%    /tmp
|
|   /dev/ad8s1f     39G     23G     13G    64%    /usr
|
|   /dev/ad8s1d    5.8G    3.9G    1.5G    72%    /var
|
|   procfs         4.0k    4.0k      0B   100%    /proc
|
|   devfs          1.0k    1.0k      0B   100%    /var/named/dev
|
|   so in memory I have old kenel
|
|   uname -a shows that #0: Sat Nov 12 20:17:02 EET 2011
|
|   (I have compiled new kenel on 2011 12 03 )
|
|   but on disk all is new: kernel and world.
|
|   How to force to load kernel from second drive (without access to
|
|   machine directly)?
|
You can specify an alternative slice on the next boot:

boot0cfg -s XXX adYYY

where XXX - slice number, YYY - disk number


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