If a PC Card ATA device is recognized, the pcata device driver is automatically loaded, IRQs allocated, devices nodes created, and special files created (if they don't already exist).
vold does not support pcata. File systems must be mounted manually.
You need to umount the file system before removing the disk.
The ufs file systems on removable media (PC Card ATA) should have one of the 'onerror={panic, lock, umount}' mount options set.