Educause Security Discussion mailing list archives
Re: How much does disk encryption add to boot time?
From: Jordan Wiens <numatrix () UFL EDU>
Date: Wed, 2 May 2007 11:56:04 -0400
Other have already chimed in with their findings on this and I'd figure I'd point out one of the reasons why that's the case -- the boot process is bottlenecked almost the entire time by the hard drive rather than the CPU. The biggest impact on a system with encryption is not extra drive reads or writes, but extra work for the CPU. Most modern systems have CPUs that are highly under-utilized (which is why there are power saving technologies in laptops that automatically throttle down the CPU clock speed when it's not needed), so if there's noticeable degradation in system performance on a modern machine using encryption, there's probably something wrong with that implementation. -- Jordan Wiens, CISSP UF Network Security Engineer (352)392-2061 On May 2, 2007, at 10:43 AM, David Millar wrote:
Does anyone have experience with roughly how much additional time it takes to boot a typical late-model office laptop (or desktop)? We aren't talking hours here I hope. Thanks. Dave Millar University Information Security Officer University of Pennsylvania
Current thread:
- How much does disk encryption add to boot time? David Millar (May 02)
- <Possible follow-ups>
- Re: How much does disk encryption add to boot time? Roger Safian (May 02)
- Re: How much does disk encryption add to boot time? Pace, Guy (May 02)
- Re: How much does disk encryption add to boot time? George Bailey (May 02)
- Re: How much does disk encryption add to boot time? Matthew Gracie (May 02)
- Re: How much does disk encryption add to boot time? Jordan Wiens (May 02)
- Re: How much does disk encryption add to boot time? David A Lundy (May 02)
- Re: How much does disk encryption add to boot time? Alan Amesbury (May 04)
- Re: How much does disk encryption add to boot time? Cal Frye (May 04)