From RH's 7.2 Install Guide Unless you have a reason for doing otherwise, we recommend that you create the following partitions:
* A swap partition (at least 32 MB) — swap partitions are used to support virtual memory. In other words, data is written to a swap partition when there is not enough RAM to store the data your system is processing. The size of your swap partition should be equal to twice your computer's RAM, or 32 MB, whichever amount is larger, but no more than 2048 MB (or 2 GB). In Disk Druid, the partition field for swap should look similar to the following:
<Swap> hda6 64M 64M Linux swap
For example, if you have 1 GB of RAM or less, your swap partition should be at least equal to the amount of RAM on your system, up to two times the RAM. For more than 1 GB of RAM, 2 GB of swap is recommended. Creating a large swap space partition will be especially helpful if you plan to upgrade your RAM at a later time.
* A /boot partition (50 MB) — the partition mounted on /boot contains the operating system kernel (which allows your system to boot Red Hat Linux), along with files used during the bootstrap process. Due to the limitations of most PC BIOSs, creating a small partition to hold these files is a good idea. For most users, a 50 MB boot partition is sufficient. In Disk Druid, the partition field for /boot should look similar to:
/boot hda1 16M 16M Linux native
Caution
If your hard drive is more than 1024 cylinders (and your system was manufactured more than two years ago), you may need to create a /boot partition if you want the / (root) partition to use all of the remaining space on your hard drive.
* A root partition (1.2-3.5 GB) — this is where "/" (the root directory) will be located. In this setup, all files (except those stored in /boot) are on the root partition. A 1.2 GB root partition will permit the equivalent of a workstation installation (with very little free space), while a 3.5 GB root partition will let you install every package. In Disk Druid, the partition field for / should look similar to:
/ hda5 3734M 3734M Linux native