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General Category => Technical Support - Software related => Topic started by: darkhalf on 06:43, 26 January 25

Title: Masking bad sectors
Post by: darkhalf on 06:43, 26 January 25
Is there any CPC program available which lets you mask bad sectors in the file allocation table? I've got a bunch of 3" floppies which I'm just copying some utilities on, but want to skip around the bad sectors. 

Some of the disk just have bad sectors around tracks 38-39 or random tracks in the middle. FYI I've checked them under the scope for mould, cleaned with IPA and reformatted/verified out with greaseweazel and HxCFloppyEmulator

Ideally the method would be to scan and list the bad sectors then tag those against a hidden file. At least make the discs are somewhat usable



Title: Re: Masking bad sectors
Post by: pelrun on 08:48, 26 January 25
https://www.cpcwiki.eu/forum/hardware-related/alternative-way-to-check-or-fix-disks/ has discussion of a couple of options.
Title: Re: Masking bad sectors
Post by: roudoudou on 09:36, 26 January 25

there is this tool https://www.cpc-power.com/index.php?page=detail&num=5128
Title: Re: Masking bad sectors
Post by: eto on 09:42, 26 January 25
I use Multi-Mark:
https://www.cpc-power.com/index.php?page=detail&num=9297
Title: Re: Masking bad sectors
Post by: darkhalf on 13:02, 26 January 25
Thanks for the responses. Will check out Mark Error and Multimark
Title: Re: Masking bad sectors
Post by: Egg Master on 16:26, 26 January 25
I have always used Multi Mark, which is newer. 
Both programs are by the same author.
Title: Re: Masking bad sectors
Post by: darkhalf on 04:49, 27 January 25
Yeah I've burned that one to ROM and run through my disks. I managed to pick up some for give away but some have sides with bad sectors. Amsoft were the most reliable, and the blank no name ones tended to be throw away
Title: Re: Masking bad sectors
Post by: Nich on 21:09, 01 February 25
I have used Diskrepair (https://www.cpc-power.com/index.php?page=detail&num=6952) in the past to mark bad sectors. It's a type-in listing that was published in the German magazine PC Amstrad International, although bizarrely, you have to use a joystick to select the options on the menu!
Title: Re: Masking bad sectors
Post by: GUNHED on 23:28, 01 February 25
BD04.COM for CP/M: well and reliable. Posted about this couple of times.  :)
Title: Re: Masking bad sectors
Post by: darkhalf on 09:11, 02 February 25
Thanks! Good to know more options


QuoteBD04.COM (https://www.cpcwiki.eu/forum///bd04.com) for CP/M: well and reliable. Posted about this couple of times.
Link is 404 but found it in attached to your other post here
https://www.cpcwiki.eu/forum/hardware-related/alternative-way-to-check-or-fix-disks/ (https://www.cpcwiki.eu/forum/hardware-related/alternative-way-to-check-or-fix-disks/)
Title: Re: Masking bad sectors
Post by: GUNHED on 15:39, 02 February 25
Thanks for the link! The topic comes up once in a while.  :) :) :)
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