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Ghost Compression (Read 11018 times)
Pleonasm
Übermensch
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Posts: 1619
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Ghost Compression
Feb 11
th
, 2006 at 12:33pm
The degree of compression achieved with a Ghost 9/Ghost 10 image may be determined
at any time
using the following procedure with Windows Explorer.
Step 1: Navigate to the file containing the recovery point (e.g., C_Drive.v2i), and record its size (denoted by 'X').
Step 2: Mount the image by right-clicking the file name (e.g., C_Drive.v2i) and choose “Mount”.
Step 3: Right-click the name of the drive from Step 2 and select “Properties” to display the Used Space (denoted by 'Y').
Note: For a more accurate compression estimate, subtract the size of \Hiberfil.sys and \Pagefile.sys, since these two files are only represented by ‘placeholders’ in the Ghost 9/Ghost 10 in the recovery point (
Norton Ghost 10.0 User’s Guide
, page 57).
Step 4: The quantity 100*(1-X/Y) yields the percent compression.
To retrieve the compression level (e.g., High/Medium/Standard/None) that was used by Ghost 9/Ghost 10, open the recovery point using the Recovery Point Browser, select the
recovery point
(not the name of the drive) and view its properties (i.e., File -> Properties menu).
Symantec estimates the following levels of compression (
Norton Ghost 10.0 User’s Guide
, pages 61-62):
Standard: 40%
Medium: 45%
High: 50%
ple • o • nasm
n. “The use of more words than are required to express an idea”
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Brian
Demigod
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Posts: 6343
NSW, Australia
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Re: Ghost Compression
Reply #1 -
Feb 12
th
, 2006 at 1:50pm
Nice formula Pleo.
Removing the pagefile from the C drive used space gives a compression of 49%. I used High compression. Being lazy and not removing the pagefile gives a compression pf 53%. As you point out, the former figure is more accurate.
I don't use hibernation.
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