this can be done by applying raid.

there is a linear mode in raid which concates
two(many)partition(which can be on different harddisk.
for linear mode-->

in /etc/raidtab

you have to enter 
  
  raiddev /dev/md0
  raid level linear
  nr-raid-disks 2
  chunksize 32
  persistent-superblock 1
  device /dev/sdb1
  raid-disk 0
  device /dev/sdc5
  raid-disk 1

now run mkraid /dev/md0

but before this u have to be sure that ur kernel
support the raid.

one more thing--this will destroy ur all data..so take
the backup.

i think there is some volume manager software that may
prevent to loose ur date...i don't have any idea about
this..

cheers 
jitendra agarwal
 
--- Ashok Iyer <[EMAIL PROTECTED]> wrote: > Hi
all,
> 
> I have a Red Hat Linux 7.3 machine working as a file
> server with 36GB allocated for /home. I want to make
> /home 72GB by adding another disk. 
> 
> Can you suggest how this can be accomplished
> non-destructively as well as destructively. I dont
> mind moving the existing data out of /home,
> repartitioning it and then moving the data back.
> I am using SCSI disks. 
> 
> 
> --
> Ashok
> 
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