Operation Manual

Automatic Partition Operations
Copyright © Acronis, Inc., 2000–2005
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Hard disk partitions are not only assi
g
ned letters, but are also numbered. That means some
operating system partitions are assigned letters and numbers, in others, only numbers.
Create, delete and move partition operations, as well as hiding/unhiding a
partition and direct letter change may result in problems running
applications, opening files (as some shortcuts become unusable) or booting
an operating system.
Therefore, when performing partition operations, you must be careful and
remember that each operating system works differently with partition
letters. Each OS has its own partition letter assignment rules.
Windows 95/95OSR2/98/Me
Windows 95 (original) assigns partition letters automatically in fixed order,
according to these rules:
Partition letters start from C: and continue until Z:. C: partition is
considered system, i.e. used for OS startup.
Note that this OS cannot reco
g
nize all partitions, but only 1 (FAT12), 4 and 6 (FAT16)
types. File system type is determined not by partition type, but by its contents. Partitions of
other types are passed (no letters are assigned to them).
The first primary active partition found on the first hard disk is assigned
C:. If there’s no such partition, C: is assigned to the first suitable
primary partition
Similarly and consecutively, one of the primary
partitions from other
hard disks is considered. They are assigned D:, E:, etc. (If there is no
suitable partition found on the first disk, then C:, D:, etc. are
assigned.)
Next, all suitable logical partitions are considered in the sequence order
on the first, second, third, etc. hard disks. They are assigned E:, F:,
G:, for example
Finally, in order, letters are assigned to all remaining suitable primary
partitions of the first, second, third, etc. disks.
The Windows 95 OSR2/98/ME partition letter assignment order is almost
the same as in original Windows 95, with the following exceptions:
Additional type
11 (FAT32), 12 (FAT32 LBA) and 13 (FAT16 LBA)
partitions are considered. This is tied to FAT32 and high-capacity hard
disk support
Partition operations in the mentioned operating systems may result in
problems running applications, opening files, and other problems if letter
assignments change.
Windows NT/2000/XP