If you are using a Speedgoat target machine, contact Speedgoat
Simulink® Real-Time™ recognizes only a target computer hard drive formatted as FAT-32.
The hard drive must be an Integrated Device Electronics (IDE) or serial ATA (SATA) drive.
When the target computer BIOS is set to AHCI or RAID mode, Simulink Real-Time does not recognize a SATA hard drive. Change the BIOS to IDE mode.