slice weirdness
Allan Fields
bsd at afields.ca
Mon Aug 9 00:47:33 PDT 2004
On Sun, Aug 08, 2004 at 11:13:37PM +0200, Stijn Hoop wrote:
> Hi,
>
> while trying to migrate my FreeBSD -CURRENT partition to another disk, I keep
> running into a slice weirdness issue which makes the kernel unable to find
> it's root fs. It seems that something about the partition table is fishy such
> that GEOM doesn't find both slices:
Which kernel: the one from your existing install, the install kernel
(booting off CD), a new kernel?
I've had some partition/slice issues in the past w/ install CD and
missing device entries with non-standard slice (anything except s1
entry), can't recall details, but running sysinstall w/ newfs
flag to N creates appropriate entries. Else I've found suitable
device entries elsewhere or make them temporarily with mknod.
Maybe this was only an issue in -stable.
> So where's my /dev/ad1s2?
>
> The disk layout is ad1s1 is my Windows partition, ad1s2 my targeted new
> partition for the FreeBSD installation currently residing at ad0s1.
Out of curiosity, did you disklabel the second slice anew or just
copy/dd existing slice over to new drive?
> I first created ad1s2 by hand using fdisk, but got the exact same result. The
But, does a newly created slice/disklabel/root filesystem have the same problem?
i.e. if you were to go the sysinstall route and do a fresh install
on ad1, exhibit same behaviour?
> script above shows the values that I obtained when /sbin/sysinstall
> partitioned the drive. After partitioning the device nodes reappear, and I was
> able to install{kernel,world} with DESTDIR pointing to the newly mounted
> ad1s2, but the device nodes disappear after having booted the newly installed
> slice. That boot ends with the kernel unable to find the root file system
> ad1s2a (which is not strange given the above).
>
> Am I looking at some sort of geometry bug? I've tried setting the BIOS
> geometry settings to LBA (from Auto), that didn't make a difference. Setting
> them to CHS produced an unbootable Windows so I reverted that. In any case
> I thought that those values were of historical interest only...
>
> Any clues?
>
> --Stijn
>
> PS: I thought that there was a sysctl that showed the GEOM topology in XML;
> however I was unable to find it in sysctl -a. Is it still around?
I believe so, phk recently (few months back) mentioned it's staying in.
> --
> The rain it raineth on the just
> And also on the unjust fella,
> But chiefly on the just, because
> The unjust steals the just's umbrella.
--
Allan Fields, AFRSL - http://afields.ca
2D4F 6806 D307 0889 6125 C31D F745 0D72 39B4 5541
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-current/attachments/20040809/689a113b/attachment.bin
More information about the freebsd-current
mailing list