[TriLUG] Claiming an unused partition

[Rick DeNatale]

I've got two 9GB SCSI drives.  fdisk -l reports:

Disk /dev/sda: 9100 MB, 9100369920 bytes
255 heads, 63 sectors/track, 1106 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
 
   Device Boot    Start       End    Blocks   Id  System
/dev/sda1   *         1        13    104391   83  Linux
/dev/sda2            14        78    522112+  82  Linux swap
 
Disk /dev/sdb: 9100 MB, 9100369920 bytes
255 heads, 63 sectors/track, 1106 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
 
   Device Boot    Start       End    Blocks   Id  System
/dev/sdb1   *         1      1106   8883913+  83  Linux

So I'm not using most of dev/sda, it only has two small partitions,
boot and swap

What's the best way to create a new partition or partitions in the
unused space? Can I do this from a running system, or do I really need
to reboot from a floppy? What's the best tool to use?

I've never repartitioned a linux system before, so I'm a little
skeered! I'm still running RH9 (I know, I know)