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Does an external USB hard disc need at least one primary partition ?
Posted by Jason Stacy on February 17th, 2008


I bought a new external hard disc which I plan to connect through USB in order to backup
some of my files/directories.

Before using I must create some partitions. Now I am wondering wether I need at least a dummy
primary partition on this hard disc.

Is this required or can I just put ONLY extended/logical partitions on this hard disc?

J.

Posted by Mark L. Ferguson on February 17th, 2008


It may help you to review the nomenclature. All drives have at least a
primary partition. Some drive have a primary, and an 'extended' partition.
IF there is a useful use of the extended partition, it is because there is
at least one 'logical' partition on it. There can be, of course, more than
one logical partition. Three partitions on a drive would be a primary, and
an extended, with two logicals on the extended. If there was a CD drive in
the mix, the letters would be C: primary, D: CD drive, E:, and F: as
logicals on an extended. (diskmgmt.msc can change all but the 'system' drive
letter.)

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Mark L. Ferguson

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