Get a 156 GB Linux Partition from a 160 GB IDE Drive
"Except for the most recent kernels, Linux will only see 137 GB out of the 156 GB on the the Maxtor "160 Gigabyte" Diamondmax 540T drives. I found nothing on the Maxtor or RedHat web sites about this, but a search of the Linux Kernel mailing list produced a number of references to a patch which was purported to work by some people." Read the article at NBer.org.