Something my Mac can do which my Windows 7 desktop can't...
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From: Rowland McDonnell on 2 Jun 2010 21:35 Jim <jim(a)magrathea.plus.com> wrote: > Chris Ridd <chrisridd(a)mac.com> wrote: > > Jim said: > > > >> James Jolley <jrjolley(a)me.com> wrote: > >>> I bet it took such a long time because of the size of the files. I > >>> think the secure empty does what the disk utility does when using > >>> secure erase, overwrites the files with 0's. > >> > >> Yep. See my other reply. Metaphorically speaking. > > > > It used to overwrite the file with random data, perhaps in multiple > > passes. I believe srm(1) describes the algorithms. > > I think it's eight passes. On big files that could easily take a long, long > time. man srm. 1 pass or 7 passes or 35 passes, depending. 35 passes takes `forever' on files of many gigabytes. Rowland. -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking
From: Jim on 3 Jun 2010 01:12 Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: > > I think it's eight passes. On big files that could easily take a long, long > > time. > > man srm. > > 1 pass or 7 passes or 35 passes, depending. > > 35 passes takes `forever' on files of many gigabytes. Quite. So if the files that Conor was erasing were, say, VM (Virtual Machine) files then it could easily take several hours to secure-erase them. If Windows is doing it quicker -on the same size files- then it's doing it less securely. At a guess. Jim -- "Microsoft admitted its Vista operating system was a 'less good product' in what IT experts have described as the most ambitious understatement since the captain of the Titanic reported some slightly damp tablecloths." http://www.thedailymash.co.uk/
From: Rowland McDonnell on 3 Jun 2010 01:44 Jim <jim(a)magrathea.plus.com> wrote: > Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: > > > > I think it's eight passes. On big files that could easily take a long, > > > long time. > > > > man srm. > > > > 1 pass or 7 passes or 35 passes, depending. > > > > 35 passes takes `forever' on files of many gigabytes. > > Quite. So if the files that Conor was erasing were, say, VM (Virtual > Machine) files then it could easily take several hours to secure-erase > them. > > If Windows is doing it quicker -on the same size files- then it's doing > it less securely. At a guess. Disc speed is the limiting factor. The host OS isn't going to make a lot of difference. Rowland. -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking
From: T i m on 3 Jun 2010 02:24 On Thu, 3 Jun 2010 02:35:27 +0100, real-address-in-sig(a)flur.bltigibbet.invalid (Rowland McDonnell) wrote: >Rowland. >(who's blacker than Black Jack McBlack, winner of last years `Black' >competition on this one - and will sneer outrageously down his >magnificent nasal appendage[1] at anyone who dares criticise him for >it). > >[1] It's not actually a nose, it's an attachment I had fitted specially. >Well, the original nose was French, can't be doing with that, can I? > http://www.youtube.com/watch?v=XiDmMBIyfsU (Funny but not Bedlam / family friendly). T i m p.s. Actually that sketch mirrors many of the threads on here. ;-)
From: Pd on 3 Jun 2010 05:08
Jim <jim(a)magrathea.plus.com> wrote: > Quite. So if the files that Conor was erasing were, say, VM (Virtual > Machine) files then it could easily take several hours to secure-erase > them. Would that be Conor the drive-by troll? Classic short snidey attempt at provocative post, no further participation in thread. You Mac weenies are all the same. Win7 for the w1n! -- Pd |