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October 2006, Week 3

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Subject:
Re: Purging data
From:
Stan Sieler <[log in to unmask]>
Reply To:
Stan Sieler <[log in to unmask]>
Date:
Mon, 16 Oct 2006 15:37:05 -0700
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Re:
> I seem to recollect hearing that the time per disk for a format on large
> capacity drives was prohibitive.  Do you have a rough estimate for 'time to
> format' per disk of say 8gb size?

Our WipeDisk/iX (and /UX) offers four increasingly thorough modes
of erasing a disk drive (NISPOM_C, NISPOM_D, HIPAA, and ACSI33).

On an HP 3000/928 (48 MHz), erasing a 3.9 GB drive (Seagate?)
with WipeDisk/iX:

 CPU:    98; Elapsed:  1,298 secs : NISPOM_C             3    MB/sec
 CPU: 3,083; Elapsed:  7,977 secs : NISPOM_D             0.5  MB/sec
 CPU: 8,662; Elapsed: 16,193 secs : HIPAA                0.25 MB/sec
 CPU: 6,266; Elapsed: 17,255 secs : ACSI33               0.23 MB/sec
 CPU:     ?  Elapsed: 36,000 secs : VOLUTIL/ FORMATVOL   0.1  MB/sec

In short, you could do both of the most thorough (aka slowest)
WipeDisk erasures (HIPAA and ACSI33) in less time than formatting
a drive :)

An N4000-x100-440 is about 5 times as fast as the above, at least for
WipeDisk ... I haven't tested the VOLUTIL/FORMATVOL on such.

(ACSI33 meets the Australian Government's Department of Defence's Information 
Technology Security Manual ACSI 33, Feb 2004 version) 

Stan
-- 
Stan Sieler
[log in to unmask]
www.allegro.com/sieler/wanted/index.html 

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