[Coco] Backing up a HD to an SD

[Gene Heskett]

On Saturday 13 June 2015 02:16:12 Barry Nelson wrote:
> There are two options that has not been tested and a third one that I
> have used but may or may not work in any given case.
>
> 1) (Not tested) Boot a floppy disk with OS9 and drivers for both hard
> disks, then try this: MERGE /OD@ >- /ND@
> That SHOULD do a raw sector dump of the contents of OD onto ND. Of
> course ND must be greater than or equal in size to OD. 2) (Not tested,
> requires programing) Try to get both hard disks recognized at the same
> time under HDBDOS or RGBDOS and modify a program I wrote called HDBACK
> which currently copies one HD floppy partition at a time from one hard
> drive to another or to physical floppy to instead keep going and copy
> all floppy partitions on one hard disk to another. 3) (Tested? well,
> not really, it worked once, for me) Hook both hard drives up to a PC
> running Linux and use the dd command to do a raw sector dump from one
> disk to another. This is what I did last time this issue came up. In
> my case the new "hard disk" was a vhd image file usable by the MESS
> emulator and DriveWire.
>
> Tell your friend I wish him luck. He'll need it.

The last time I did it, I used dsave from the os9 partition on scsi drive 
0 to the whole drive, formatted as os9, but other than cluster size, an 
identical 1Gbyte seagate barracuda as drive 1.  It took a while, but no 
errors.  The 490 meg partition's cluster size is 4, the whole drives 
cluster size is 16.  That was not a problem.  I did it in 2 steps 
though, first generating the script on trhe root of drive0, and then 
executing the script.  On my system, that seems to be faster overall 
than forking a new shell to execute each line of the dsave output. YMMV 
of course.
>
> On Jun 13, 2015, at 1:18 AM, coco-request at maltedmedia.com wrote:
> > Date: Fri, 12 Jun 2015 18:31:09 -0700
> > From: "Stephen H. Fischer" <SFischer1 at Mindspring.com>
> > To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> > Subject: Re: [Coco] Backing up a HD to an SD
> > Message-ID: <BA77D3517E9B483B9404F95CFE1C3B24 at Trinity>
> > Content-Type: text/plain;	charset="iso-8859-1"
> >
> >
> > ----- Original Message -----
> > From: "Barry Nelson" <barry.nelson at amobiledevice.com>
> > To: <coco at maltedmedia.com>
> > Sent: Friday, June 12, 2015 6:10 PM
> > Subject: Re: [Coco] Backing up a HD to an SD
> >
> >> If the hard drive is formatted using HDBDOS and Disk Extended Color
> >> BASIC and not OS9, then it becomes more complex.
> >
> > While I am not using my CoCo's anymore, a person who may be
> > supplying me data may be in the process of doing this and your ideas
> > may be useful to him.
> >
> > So please say more.
> >
> > SHF

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>