Add partition to existing disk

[Scott Hiemstra]

Thanks Jerry...  I'll give it a try this evening.



> -----Original Message-----
> From: owner-freebsd-questions at freebsd.org 
> [mailto:owner-freebsd-questions at freebsd.org] On Behalf Of 
> Jerry McAllister
> Sent: Wednesday, March 29, 2006 10:52 AM
> To: Scott Hiemstra
> Cc: freebsd-questions at freebsd.org
> Subject: Re: Add partition to existing disk
> 
> Hi,
> 
> > I have an existing system which I cannot reinstall and 
> sysinstall seems like
> > too much of a wizard to use on a well running existing 
> system.  When I built
> > the system 2 years ago I decided to leave about 25GB of 
> unpartitioned space
> > for future unknown projects, I now have a use for the space 
> but I can't for
> > the life of me figure out exactly what steps are needed to 
> use the space.
> > 
> > The system is configured as follows:
> > Dell PE 2650 with 3x36GB drives in a Hardware RAID 5 on a 
> PERC controller
> > 4.11-STABLE
> > 
> > And the currect disklabel is:
> > #disklabel aacd0s1
> > # /dev/aacd0s1c:
> > type: ESDI
> > disk: aacd0s1
> > label:
> > flags:
> > bytes/sector: 512
> > sectors/track: 63
> > tracks/cylinder: 255
> > sectors/cylinder: 16065
> > cylinders: 8849
> > sectors/unit: 142175187
> > rpm: 3600
> > interleave: 1
> > trackskew: 0
> > cylinderskew: 0
> > headswitch: 0           # milliseconds
> > track-to-track seek: 0  # milliseconds
> > drivedata: 0
> > 
> > 8 partitions:
> > #        size   offset    fstype   [fsize bsize bps/cpg]
> >   a:  4096000        0    4.2BSD     2048 16384    90   # 
> (Cyl.    0 - 254*)
> >   b:  3072000  4096000      swap                        # 
> (Cyl.  254*- 446*)
> >   c: 142175187        0    unused        0     0        # 
> (Cyl.    0 -
> > 8849*)
> >   e: 12288000  7168000    4.2BSD     2048 16384    89   # 
> (Cyl.  446*-
> > 1211*)
> >   f:  4096000 19456000    4.2BSD     2048 16384    90   # 
> (Cyl. 1211*-
> > 1466*)
> >   g: 61440000 23552000    4.2BSD     2048 16384    89   # 
> (Cyl. 1466*-
> > 5290*)
> > 
> > As you can see I have space available from 84992000 through 
> 142175187.  I
> > have done similar things in Solaris and other OS's but I'm 
> just not sure
> > exactly what the FreeBSD steps are to utilize this space.
> > 
> > Any pointers are appreciated.
> 
> Go to single user mode.
> do:
>     fsck -p            (shouldn't be needed, but just in case)
>     mount -u /
>     mount -a
>     swapon -a
> 
> run disklabel -e on the drive
>     disklabel -e [-r] aacd0s1
> 
> Add the following line in the edit file it gives you.
> 
> 
>   h: *   *   4.2BSD   2048   16384   89
> 
> (I am not sure about that 89 for bps/cpg.  Just use what it wants to)
> 
> Write and quit the edit session.
> 
> Then to an newfs on the /dev/aacds1h partition
> 
>    newfs -b 16384 -f 2048 -i 2048 /dev/raacd0s1h
> 
>   (You could just take the defaults for the newfs, but I like 
> to specify
>   block and frag the same as in the disklabel and the -i causes it to
>   make more inodes which I seem to need on larger file systems)
> 
> Add a mount point for it however you want, for example
>     mkdir /work
> 
> add a line to your /etc/fstab
> 
> /dev/ad0s3h      /work     ufs     rw      2       2
> 
> Substitute your own mount point if you created one with a 
> different name.
> 
> Type mount -a    and voila, you have it.
> 
> You might have to run an fsck on it.
> > 
> > 
> > Thanks,
> > Scott
> > 
> > 
> > 
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