Thank you, Elly.
I've had a try. It failed again with error prompt "no such partition."
I think the reason is in the chapter 8.4.2 of LFS 7.1 book as follow:
...Note that this is different from earlier versions where both numbers started
from zero. For example, partition sda1 is (hd0,1) to GRUB and sdb3 is (hd1,3)...
________________________________
发件人： Eleanore Boyd <cara...@cox.net>
收件人： Omar <vic...@yahoo.com.cn>; LFS Support List
<lfs-support@linuxfromscratch.org>
发送日期： 2012年5月24日, 星期四, 下午 8:12
主题: Re: [lfs-support] lfs7.1 cannot boot
On 5/24/2012 7:11 AM, Eleanore Boyd wrote:
On 5/24/2012 2:07 AM, Omar wrote:
>Hi, all:
>>I finished all work of the LFS 7.1 book except the error when booting my LFS.
>>
>>
>>Firstly, I states my LFS 7.1.
>>I use VMware installed Ubuntu 10.04 on a virtual SCSI disk of 20G. Before
>>beginning, I add another 8G virtual SCSI disk to VM and mount it in the
>>Ubuntu manually. So the first disk with Ubuntu displays sda in /dev/ and the
>>second which is mounted newly displays sdb in /dev/. Following the book I
>>install LFS 7.1 on the sdb1 which is formatted with ext3 on the sdb and given
>>only one partition. All pass with no error.
>>According to my disk in chapter 8.4.3 I run cmd as grub-install /dev/sdb and
>>in chapter 8.4.4 I save grub.cfg as follows.
>>
>>
>># Begin /boot/grub/grub.cfg
>>set default=0
>>set timeout=5
>>
>>insmod ext2
>>set root=(hd1,1)
>>
>>menuentry "GNU/Linux, Linux 3.2.6-lfs-7.1" {
>> linux /boot/vmlinuz-3.2.6-lfs-7.1 root=/dev/sdb1 ro
>>}
>>
>>
>>After a few works such as logout and unmount, I reboot the computer. But it
>>starts up using Ubuntu again only appearing error checking of a moment.
>>
>>
>>Then I change the cmd in chapter 8.4.3 to grub-install /dev/sda and keep
>>grub.cfg the same and reboot again. The computer gives errors as follows and
>>stop starting up.
>>
>>
>>md: Autodetecting RAID arrays.
>>md: Scanned 0 and added 0 devices.
>>md: Autorun ...
>>md: ... autorun DONE.
>>Root-NFS: on NFS server address
>>VFS: Unable to mount root fs via NFS. trying floppy.
>>VFS: cannot open root device "sdb1" or unknown-block(2.0)
>>Please append a correct "root=" boot option; here are the
available partitions:
>>0b00 1048575 sr0 driver: sr
>>Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(2.0)
>>Pid: 1. comm: swapper/0 Not tained 3.2.6 #1
>>Call trace:
>>...mount_block_root+0x141/0x1c9...mount_root...kernel_init...
>>
>>
>>
>>I search this problem from lfs mail list and google, which says that
>>compiling kernel needs some SCSI driver or changing hda to sda in the
>>grub.cfg and etc. .I compile the kernel again with more drivers like SCSI.
>>When I reboot again, it is the same.
>>
>>
>>Could anybody help me? Thanks in advance.
>>
>>
>>
>>Omar
>>
>>
As I recall, (hd*,*) refers to disk and partition, where the numbering starts
at 0. It probably can't find the kernel at the second partition, or the second
partition doesn't exist. (hd1,1) would actually be (hd1,0) to find the kernel
and system.
>
Oops. Forgot to sign. It's a little early for my head....
Elly
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