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The 40 MB Passport removable hard drive was developed before MS-DOS allowed for an extended DOS partition. At that time, users were limited to one 32 MB primary DOS partition and the Passport hard drive was incompatible with drivers such as Disk Manager. To allow you to use the entire 40 MB available on your drive, the Passport has the ability to appear as two physical drives. The drive controller then provides the translation.

According to Plus Development technical support, the MS-DOS 5.0 FDISK command can create a 40 MB primary DOS partition on the first of the two physical drives reported by the Passport controller. The second drive will then appear as a disk of size 0. Note that FDISK will still report the extra physical drive; this is perfectly normal and has no ill effects.

If you have a second drive of size 0, you can use the /1 switch on your Passport driver to eliminate the second drive. For more information on the /1 switch, contact Plus Development technical support.

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