Slackware :: Cannot See All Partitions On 13.0 Netbook Install

I have a new acer aspire one netbook I intend to dual boot. It came with xp installed on sda1. When repartitioning with gparted off a usb stick I noted two existing partitions, one small one for acer stuff and the second for xp.

I shrank the xp partion and created two new linux primary partitions. This gives me sda's 1-4 in gparted but once booted off a usb stick into the slackware install only sda and sda1 are created in /dev.