Re: Using CiderPress to copy a volume image to a card formatted for Windows...

[Tom Greene <tom@cowgod.org>]

On Feb 17, 12:19 pm, Michael J. Mahon <mjma...@aol.com> wrote:
> a2retro <rg.jo...@rogers.com> wrote:
> > Hi Michael, while implementing and converting  Robert Justice's IIc
> > smartport drive project over to use MicroSD I found it advantageous to
> > sometimes zero out the media. I used a Western Digital diagnostic
> > program to do that.
>
> > You can get it here  -
> >http://support.wdc.com/product/download.asp?groupid=502&sid=3〈=en
>
> > There is an option to write zeros to the drive which takes about 4
> > minutes per GB.
>
> Interesting--that's just about how long DISKPART kept the card busy when I
> CLEANed it.
>
> I'll take a look at the utility.
>

Diskpart's 'clean all' does zero the whole device, except maybe block
0. I think it leaves a stub "This is a non-bootable disk." type of
boot sector.

The 'clean' command without 'all' zeroes maybe the first few MB,
enough to clobber the partition tables and such.

Tom