Re: 8280 Drive - Service Manual / FD1797B-02

From: Rob Clarke <crock_at_clarke-family.org.uk>
Date: Thu, 26 Apr 2018 22:56:44 +0200
Message-ID: <9a89ea76-44e3-6d19-8581-aee3897c6ea6@clarke-family.org.uk>
I think the second pass of the format looks for, and marks, bad blocks. 
A disk that has all sectors marked good should have 3946 blocks free on 
an 8280.

Rob

On 26/04/2018 19:05, vossi wrote:
> OK,
> it was my mistake - I didn't realized that the new diskettes are write
> protected!!!
> Now I taped the small notch and was able to format disks in both drives.
>
> Drive 0 formatted disk is readable in both drives, but drive 1 formatted
> disks is only readable in this drive.
> I think I have to clean both drives and heads...
>
> Interesting note:
> Both new Memorex 2s2d flex disks have 3944 blocks free.
> The used Maxell FD2-XD 2s2d disk has 3945 blocks free - why ???
>
>
>
> -----
> greets
> Christian
> --
> Sent from: http://cbm-hackers.2304266.n4.nabble.com/
>
Received on 2018-04-26 23:04:44

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