When the Portfolio is reading from or writing to an external drive (e.g. ZIP, ATA or Compact Flash), if it powers down in the middle of a disk access then data may be corrupted. This is because the associated device driver has configured the drive via various IO writes, and a power down/power up sequence can leave the drive in an un-configured state temporarily. Even if the associated driver code configures all necessary IO just prior to every read or write, a power down could occur just after all that configuration and before accessing the disk. The Tech Note attached outlines some possible solutions to this issue.
Thema: External drive data corruption during power sequencing (Gelesen 211 mal)