[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Questions on Disk ][ error checking
- Subject: Re: Questions on Disk ][ error checking
- From: rtk <oneelkruns@hotmail.com>
- Date: Wed, 11 Nov 2009 15:28:15 -0800 (PST)
- Complaints-to: groups-abuse@google.com
- Injection-info: g27g2000yqn.googlegroups.com; posting-host=192.5.156.252; posting-account=xXbNkwkAAAButq5zlMjqtvU6g6pnJ3nn
- Newsgroups: comp.sys.apple2
- Organization: http://groups.google.com
- References: <dog_cow-1257974095@macgui.com>
- User-agent: G2/1.0
- Xref: g2news1.google.com comp.sys.apple2:12602
On Nov 11, 2:15 pm, dog_...@macgui.com (D Finnigan) wrote:
> I have a question about the error-checking mechanism used on the Disk ][.
>
> As I understand it, checksums are used to verify that the data read from the
> disk are valid and error-free. However, would there be a way to skip these
> checks? Is there any software that does so?
>
> I ask because I have more than one disk which has some data and programs
> which can be read successfully, and some data which cannot. These disks are
> not copy-protected. Would it be worth my time to make a disk image of a disk
> with only partially good data? Is this even possible?
>
> Also, would there ever be a circumstance where the disk has become damaged
> in an area such that the Disk ][ cannot tell whether a bit is 1 or 0 and
> thus refuses to read that disk?
As I recall, DSK2FILE can make images with back sectors/blocks, by
simply ignoring any errors and continuing.
Ron