Re: [Dorset] Using shred
Hi Terry, > I have reformatted the drives in-situ The NAS offered a `reformat'? How long did it take? > My PC is in the bedroom, so I'd rather not run it overnight. Kill it off then start from scratch tomorrow morning, assuming ten hours for a disk? > I suspect that part of the problem is that I'm putting the drive into > an external USB adaptor, but my PC has no spare slots for other > drives. Yep. Drives have an internal `erase' method, but over USB probably isn't a good way to play with it. https://ata.wiki.kernel.org/index.php/ATA_Secure_Erase Re-assemble the NAS, see the empty (mirrored?) drives, copy innocuous stuff onto it over and over until `full'. `Erase' again for sale? Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2018-03-06 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Using shred
For modern drives a single pass with zeros is usually just fine. You can use dd if=/dev/zero of=/Dev/sdxy You could copy from /Dev/urandom for a quicker random number pass too. Hamish On 17 Feb 2018, at 18:38, Keith Edmunds mailto:k...@midnighthax.com>> wrote: On Sat, 17 Feb 2018 18:31:53 +, d-...@hadrian-way.co.uk said: I'd be happier if there was no chance of data recovery. Then destroy the drives. -- Next meeting: Bournemouth, Tuesday, 2018-03-06 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Using shred
On Saturday, 17 February 2018 18:36:34 GMT Keith Edmunds wrote: > On Sat, 17 Feb 2018 18:31:53 +, d-...@hadrian-way.co.uk said: > > I'd be happier if there was no chance of data recovery. > > Then destroy the drives. I want to sell them with the NAS Box. I do know about hammers :-) -- Terry Coles -- Next meeting: Bournemouth, Tuesday, 2018-03-06 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Using shred
On Sat, 17 Feb 2018 18:31:53 +, d-...@hadrian-way.co.uk said: > I'd be happier if there was no chance of data recovery. Then destroy the drives. -- "Laughter is the best medicine, though it tends not to work in the case of impotence" - Jo Brand -- Next meeting: Bournemouth, Tuesday, 2018-03-06 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Using shred
On Saturday, 17 February 2018 17:56:45 GMT Keith Edmunds wrote: > Shred is slow. No one will trivially read the ex-data following a > reformat. I suppose if the drive used to hold your plans for world > domination, a few more hours of shred is a small price to pay. However, > if the drive only held data of interest to you and you don't want the PC > running overnight, don't worry about it. I'm sure you are right, but the NAS Box was used to back up four different PCs and I'm not sure what was there. My two machines were both Linux and I only backed up the /home partition. Even so, there could be stuff that might give passwords away etc. The other two PCs were both Windows machines (son and daughter's) and they both tended to back up the whole of their 'C'-Drives, so it's anyone's guess what might be buried in the Registry. I'd be happier if there was no chance of data recovery. -- Terry Coles -- Next meeting: Bournemouth, Tuesday, 2018-03-06 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Using shred
Shred is slow. No one will trivially read the ex-data following a reformat. I suppose if the drive used to hold your plans for world domination, a few more hours of shred is a small price to pay. However, if the drive only held data of interest to you and you don't want the PC running overnight, don't worry about it. -- "Never, never, never give up" - Winston Churchill -- Next meeting: Bournemouth, Tuesday, 2018-03-06 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
[Dorset] Using shred
Hi, I am retiring my old D-Link Sharecenter NAS with a view to flogging it on eBay. Clearly, I want to ensure the data has been completely scrubbed off the two 1TB drives. I have reformatted the drives in-situ, but felt that I should do more than that, so I've removed the drives and am currently running shred on the first, using : sudo shred -f -v /dev/sdc The trouble is that the whole thing is so slw! I'm currently at 10% on the first pass after an hour. At that rate the first pass won't be completed until 3 am tomorrow and the third pass sometime tomorrow evening! My PC is in the bedroom, so I'd rather not run it overnight. I suspect that part of the problem is that I'm putting the drive into an external USB adaptor, but my PC has no spare slots for other drives. Any suggestions? -- Terry Coles -- Next meeting: Bournemouth, Tuesday, 2018-03-06 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
