Jon Tydda
Jon.Tydda at alcontrol.co.uk
Fri Aug 1 04:37:44 CDT 2003
McAfee Shredder does that - passes over the disk 7 times writing junk and erasing it on each pass, making it unrecoverable (they claim). Jon -----Original Message----- From: Erwin Craps [mailto:Erwin.Craps at ithelps.be] Sent: 01 August 2003 10:37 To: Discussion of Hardware and Software issues Subject: RE: [dba-Tech] Retrieving Deleted Files off a hard drive Formattting a drive will only remove the FAT (File Allocation Tabe), that the index of where the files are positoned on the drive. Formattig does alos put some positionmakers on the disk (that why you loose useable data on the disk) to find it way on the disk. It like a citymap (simply stated) You have an index saying that stree x is positioned in the square B7. Formatting removes the index (creates an empty one) and puts a new grid (the quares A7) in pace. But the data of the old streets are still there. So it is just a question to put to put the pieces togheter and build a new index (simply stated). Custers that are overwritten by the format or by new data will corruot the old file but the rest of the file is still readable. There are companies that can rebuild your disk, within 30 minutes, depending on the size and fragmentaion. Only way to clrear a disk is to write random data on each cluster thus distroying the old data. there does exesits software to do that. Erwin -----Oorspronkelijk bericht----- Van: Martin Reid [mailto:mwp.reid at qub.ac.uk] Verzonden: vrijdag 1 augustus 2003 11:05 Aan: Discussion of Hardware and Software issues Onderwerp: Re: [dba-Tech] Retrieving Deleted Files off a hard drive AFAIK unless you overwrite the data several time using specific software then its possible to get most things back. One of our guys says the only way to be totally sure is to melt down the HDD. Martin ----- Original Message ----- From: Jon Tydda <mailto:Jon.Tydda at alcontrol.co.uk> To: 'Discussion of Hardware and <mailto:dba-tech at databaseadvisors.com> Software issues' Sent: Friday, August 01, 2003 9:45 AM Subject: RE: [dba-Tech] Retrieving Deleted Files off a hard drive I formatted a hard disk with windows 95 on it, then plugged it into a pc running 98. I ran scandisk and all the files came back, so I guess format ain't everything. Jon -----Original Message----- From: Stoker, Kenneth E [ mailto:Kenneth.Stoker at pnl.gov <mailto:Kenneth.Stoker at pnl.gov> ] Sent: 31 July 2003 20:50 To: dba-Tech (E-mail) Subject: [dba-Tech] Retrieving Deleted Files off a hard drive Everyone, I recently had a discussion with a coworker about the subject of retrieving deleted files off a hard drive. We got on the subject because we are having an audit on those company-owned computers systems that some staff may have at home for business use. He claims that any file can be reclaimed, even if a defragmentation has been run. I thought that once a disk has been defragmented, those files were truly gone, if the anyone defragmented the disk, the audit would basically be a waste of time. Is this true? The computer security group here is, I'm sure, quite good, don't let any limitations be considered in any advise returned to settle this score. If it is possible, does that also apply to a reformatted disk? I would think that a reformatted disk would be the ultimate cleanup, but that would have me wondering now if a defragment doesn't work. Which would cause some serious concerns at this location as much of the stuff that I work with is very sensitive and would make me wonder about correct processes when buying a new machine and excessing the old one. Thanks for your help in settling the discussion. Ken Stoker Technology Commercialization Information Systems Administrator PH: (509) 375-3758 FAX: (509) 375-6731 E-mail: Kenneth.Stoker at pnl.gov _______________________________________________ dba-Tech mailing list dba-Tech at databaseadvisors.com http://databaseadvisors.com/mailman/listinfo/dba-tech <http://databaseadvisors.com/mailman/listinfo/dba-tech> Website: http://www.databaseadvisors.com <http://www.databaseadvisors.com> The information in this e-mail is confidential and may also be legally privileged. The contents are intended for recipient only and are subject to the legal notice available on request from : webmaster at alcontrol.co.uk ALcontrol Laboratories is a trading division of ALcontrol UK Limited. Registered Office: Templeborough House, Mill Close, Rotherham, S60 1BZ. Registered in England and Wales No 4057291 _____ _______________________________________________ dba-Tech mailing list dba-Tech at databaseadvisors.com http://databaseadvisors.com/mailman/listinfo/dba-tech Website: http://www.databaseadvisors.com The information in this e-mail is confidential and may also be legally privileged. The contents are intended for recipient only and are subject to the legal notice available on request from : webmaster at alcontrol.co.uk ALcontrol Laboratories is a trading division of ALcontrol UK Limited. Registered Office: Templeborough House, Mill Close, Rotherham, S60 1BZ. Registered in England and Wales No 4057291 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://databaseadvisors.com/pipermail/dba-tech/attachments/20030801/9e0b7541/attachment.html>