Use the table below to for our estimated guide times for erasing various types of hard drive.
Hard drive sustained write speed is determined by a number of factors including age, condition, rotational speed and interface type.
These are estimates that have been gathered from historical wipe speeds witnessed in our labs.
IDE
|
Speed (MB/Second)
|
GB
|
Total MB
|
Total min (1 pass)
|
Hours (1 pass)
|
3 pass
|
7 pass
|
|
|
|
|
|
|
|
|
|
40
|
80
|
81920
|
34
|
0.57
|
1.7
|
4.0
|
|
40
|
120
|
122880
|
51
|
0.85
|
2.6
|
6.0
|
|
40
|
250
|
256000
|
107
|
1.78
|
5.3
|
12.4
|
|
40
|
500
|
512000
|
213
|
3.56
|
10.7
|
24.9
|
SATA
|
Speed (MB/Second)
|
GB
|
Total MB
|
Total min (1 pass)
|
Hours (1 pass)
|
3 pass
|
7 pass
|
|
|
|
|
|
|
|
|
|
50
|
80
|
81920
|
27
|
0.46
|
1.4
|
3.2
|
|
50
|
120
|
122880
|
41
|
0.68
|
2.0
|
4.8
|
|
50
|
250
|
256000
|
85
|
1.42
|
4.3
|
10.0
|
|
50
|
500
|
512000
|
171
|
2.84
|
8.5
|
19.9
|
|
50
|
1024
|
1048576
|
350
|
5.83
|
17.5
|
40.8
|
|
50
|
2048
|
2097152
|
699
|
11.65
|
35.0
|
81.6
|
SCSI
|
Speed (MB/Second)
|
GB
|
Total MB
|
Total min (1 pass)
|
Hours (1 pass)
|
3 pass
|
7 pass
|
|
|
|
|
|
|
|
|
|
70
|
80
|
81920
|
20
|
0.33
|
1.0
|
2.3
|
|
70
|
120
|
122880
|
29
|
0.49
|
1.5
|
3.4
|
|
70
|
250
|
256000
|
61
|
1.02
|
3.0
|
7.1
|
|
70
|
500
|
512000
|
122
|
2.03
|
6.1
|
14.2
|
|
70
|
1024
|
1048576
|
250
|
4.16
|
12.5
|
29.1
|
Fibre
|
Speed (MB/Second)
|
GB
|
Total MB
|
Total min (1 pass)
|
Hours (1 pass)
|
3 pass
|
7 pass
|
|
|
|
|
|
|
|
|
|
75
|
80
|
81920
|
18
|
0.30
|
0.9
|
2.1
|
|
75
|
120
|
122880
|
27
|
0.46
|
1.4
|
3.2
|
|
75
|
250
|
256000
|
57
|
0.95
|
2.8
|
6.6
|
|
75
|
500
|
512000
|
114
|
1.90
|
5.7
|
13.3
|
|
75
|
1024
|
1048576
|
233
|
3.88
|
11.7
|
27.2
|
|
75
|
2048
|
2097152
|
466
|
7.77
|
23.3
|
54.4
|
SAS
|
Speed (MB/Second)
|
GB
|
Total MB
|
Total min (1 pass)
|
Hours (1 pass)
|
3 pass
|
7 pass
|
|
|
|
|
|
|
|
|
|
85
|
80
|
81920
|
16
|
0.27
|
0.8
|
1.9
|
|
85
|
120
|
122880
|
24
|
0.40
|
1.2
|
2.8
|
|
85
|
250
|
256000
|
50
|
0.84
|
2.5
|
5.9
|
|
85
|
500
|
512000
|
100
|
1.67
|
5.0
|
11.7
|
|
85
|
1024
|
1048576
|
206
|
3.43
|
10.3
|
24.0
|
|
85
|
2048
|
2097152
|
411
|
6.85
|
20.6
|
48.0
|