Acronis power utilities 사용자 설명서

 

 

 

 

decision, in general, but still acceptable in simple situations. The most effective 
information wiping algorithm based on deep analysis of subtle features of 
recording data to all types of hard disks. This knowledge speaks to the necessity 
of complex multipass algorithms to guarantee information wiping. 

The detailed theory of guaranteed information wiping is described in an 
article of Peter Gutmann, please see:  

. 

The table below briefly describes information wiping algorithms used by 
Acronis  PrivacyExpert and DriveCleanser. Each description features the 
number of hard disk sector passes along with number(s) written to each 
sector byte. 

NN 

Algorithm 

(writing 

method) 

Passes Record 

1. 

American: DoD 
5220.22-M 

4 1

st

 pass – randomly selected 

symbols to each byte of each sector, 
2 – complementary to written during 
the 1

st

 pass; 3 – random symbols 

again; 4 – writing verification. 

2. 

American: 
NAVSO P-5239-
26 (RLL) 

4 1

st

 pass – 0x01 to all sectors, 2 - 

0x27FFFFFF, 3 – random symbol 
sequences, 4 – verification. 

3. 

American: 
NAVSO P-5239-
26 (MFM) 

4 1

st

 pass – 0x01 to all sectors, 2 - 

0x7FFFFFFF, 3 – random symbol 
sequences, 4 – verification. 

4. 

German: VSITR  7 

1

st

 – 6

th

 – alternate sequences of: 

0x00 and 0xFF; 7

th

 - 0xAA; i.e. 

0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 
0xAA. 

58 

Appendix A.   : Hard Disk Wiping Algorithms