SceSdstor

Module
SceSdstor module does not export any functions exсept module_start.

This module is responsible for initializing all storage devices. This includes:
 * eMMC
 * Game gard
 * Memory card
 * Usb Mass Storage (unknown SceUsbMassForDriver)

Based on layout of data segment and code of some subroutines (mbr table init, partition entry table init etc) it can be said that there are 5 devices in total. However only first 3 devices are known at the moment.

Types
Looks like SceSdstor driver uses its own device type