id summary reporter owner description type status component version resolution keywords cc guest host 8809 SATA AHCI broken in windows XP in 4.0.6 cschmidt "After upgrading from VirtualBox 4.0.4 to 4.0.6 a Windows XP VM is unable to access a secondary drive (pops up the error message ""S:\ is not accessible The Semaphore timeout period has expired""). The SATA driver used is Intel 82801HEM/HBM version 7.0.0.1020 from 12.0.2.2007. A second disk seems to be affected worse than the primary, since I didn't encounter the Semaphore timeouts on C:, just on the second drive. However, accessing the c: drive also has latencies of minutes when e.g. starting a cmd window." defect closed virtual disk VirtualBox 4.0.6 worksforme Windows Linux