fdisk: cannot open disk /dev/ad0: No such file or directory
Jerry McAllister
jerrymc at clunix.cl.msu.edu
Mon Oct 3 06:17:37 PDT 2005
>
> Hi all,
>
> I get this when I type
>
> /home/paul# fdisk -u
>
> fdisk: cannot open disk /dev/ad0: No such file or directory
>
>
>
> ad0 is there because it's just booted off it.
>
> I have also tried this from a live CD with no active mounts.
>
You cannot fdisk the disk you are booted from or a mounted disk
other than just to read the information - but no updating.
If you need to modify the primary label of your boot disk, then
you will need to boot from something else, such as a 'fixit' CD.
In 4.xx and before, the fixit was the second CD. In 5.xxx (and I
presume after), the fixit is the first CD.
> This person had exactly the same problem:
>
> http://www.linuxquestions.org/questions/showthread.php?s=
> <http://www.linuxquestions.org/questions/showthread.php?s=&threadid=357343>
> &threadid=357343
>
> I too had used dd to transfer from a smaller HD.
>
Not a good idea.
First, build your new (larger) disk properly with fdisk/disklabel/bsdlabel
and newfs first (or you can use /stand/sysinstall - see 'man 8 sysinstall).
Then use dump(8)/restore(8) to transfer the file systems.
////jerry
>
> Additional info:
>
>
>
> /home/paul# df -h
>
> Filesystem Size Used Avail Capacity Mounted on
>
> /dev/ad0s1a 193M 92M 86M 52% /
>
> devfs 1.0K 1.0K 0B 100% /dev
>
> /dev/ad0s1d 242M 432K 222M 0% /tmp
>
> /dev/ad0s1f 4.8G 3.0G 1.4G 68% /usr
>
> /dev/ad0s1e 242M 163M 59M 73% /var
>
> devfs 1.0K 1.0K 0B 100% /var/named/dev
>
>
>
>
>
>
>
>
>
> Thanks.
>
>
>
> Paul
>
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