Storage Terminology

10 pts.
Tags:
Allocated Space
Logical Space
Physical Space
Raw Space
Used Space
I want to get clear definitions for the following:
1.Used Space
2.Allocated Space
3.Logical Space
4.Raw Space
5.Physical Space
6.Landed Space or Drives(heard this in a meeting)

If some of these terms are synonymous, please say so. Thanks

Answer Wiki

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Used space is essentially the same as allocated space. It is the space used by data files. Because space is allocated in blocks there is some space empty but allocated. For example, a file using 20 bytes may have 512 bytes allocated because it is the minimum allocation. Directory and file information, which track and access your data file also require allocated space.

Logical space might mean anything depending on the context.

Raw space and Physical space may mean the same thing. This is the actual amount of space on a drive, for example but formatting and space tracking information reduce this amount to a lower Available space amount.

Landing space is where the drive reading mechanism comes to rest when a magnetic reading head comes to rest or lands when the drive ceases spinning. Due to probable damage data is not stored in this area.

There are lots of other complications. Partitions, bad sectors, … :-)

 

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  • Michael Tidmarsh
    For these terms, you should check out Whatis.com. Most of our experts are more able to answer situational and detailed questions but I found several terms related to your question on Whatis.
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