Disk Mode
Disk Mode is a binary that serves two purposes: first, it exposes a USB Mass Storage and SCSI device to provide access to the iPod's filesystem. Second, it facilitates the recovery functionality of the iPod. On the Nano 3G, it is stored on NOR Flash.
This page currently focuses on the Nano 3G's Disk Mode unless otherwise noted.
Memory Layout
The memory layout of Disk Mode is far simpler than that of Retail OS. See analysis of Retail OS's memory layout for more details about how this relocation process works. There are only two sections that get relocated:
| Name | Memory Address | File Offset |
|---|---|---|
| sram.text | 0x22000000 | 0x00000000 |
| dram.textdata | 0x08000000 | 0x000051f4 |
Known RTXC Tasks
There are several tasks in Disk Mode that RTXC manages. These are inferred by the presence of string names for these tasks:
- HostOSTask
- USBDeviceTask
- ATAWorkLoopTask
- ATAWorkLoopIRQTask
- CNATask
