[Coco] B&B HD Setup

[Bob Devries]

A couple of questions spring to mind. Does the drive have all its jumpers 
set correctly, and is the termination set correctly?

--
Regards, Bob Devries, Dalby, Queensland, Australia

Isaiah 50:4 The sovereign Lord has given me
the capacity to be his spokesman,
so that I know how to help the weary.

website: http://www.home.gil.com.au/~bdevasl
my blog: http://bdevries.invigorated.org/

----- Original Message ----- 
From: "tonym" <tonym at compusource.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Monday, May 04, 2009 10:50 AM
Subject: Re: [Coco] B&B HD Setup


> This setup is sold - I'm just checking out the drive...
>
> It is STILL going...click...click...click
>
> going on about 19 hours!
>
>
> Tony
>
> -----Original Message-----
> From: Gene Heskett gene.heskett at verizon.net
> Sent 5/3/2009 8:34:09 PM
> To: CoCoList for Color Computer Enthusiasts coco at maltedmedia.com
> Subject: Re: [Coco] B&B HD Setup
>
> On Sunday 03 May 2009, tonym wrote:
> How long should the physical+logical format take?
>
> Physical+logical is maybe 2 or 3 minutes because there is no physical on a
> hard drive, even one that old. Logical consists of writing LNS0, then the 
> FAT
> which is however much of 64kb the number of sectors available on the disk 
> is
> divided by 8 since one bit is a sector for that sized drive, and the root
> directories file descriptor sector, and the root directory itself. This is 
> a
> very quick process and the ramddisk 'myram' actually does this in the few
> milliseconds lag between requesting an access to it with a "dir /r0" 
> before it
> shows the empty directory to you. The click click is the verify phase, 
> where
> it verifies every sector on the disk, and any bad sectors are marked in 
> the
> FATable as used. That takes a while. And the drive has to go back and 
> write
> the next sector of the FAT each time it has verified 256*8 sectors, or 
> 2048 of
> them, and that represents 524,288 bytes of disk. That is a 42meg disk, so 
> it
> will do that at least 84 times. Those will be double-clicks when it does
> that, the regular ones are just the next track seeks.
>
> dcheck won't like that if there are some that fail the read check, so when 
> I
> was using a 30 meg seagate RLL drive, I used dEd to create, byte by byte, 
> a
> file whose file descriptor sector accounted for all those bad sectors. But 
> be
> sure and use a good sector for the file descriptor. :) And the limiting
> FD.SEG count is 48, so if there are more bad sectors than that, you'll 
> need to
> create additional files for. Name them dcheck-bad-sectors-0, dcheck-bad-
> sectors-1 or something similar to remind you to never delete them.
>
> It's been going since like 2am! I can still hear the click..click...click
>
> On a 42 megger, on a B&B, it should be about done by now. On my 130 meg
> Maxtor, it was a bit over 30 hours AIR, but the disto interface I used 
> with
> the maxtor is over 2x faster than the B&B. 13 secs for a megaread... I 
> think,
> heck, that was about 20 years ago, on a coco2!
>
> Drive is a 42M IBM 0665-53 733cyl 7hd box-stock L2 with the B&B drivers...
>
> You will want to replace that with Nitros9 of course, its faster. :)
>
>
> Tony
>
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> -- 
> Cheers, Gene
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> It is a lesson which all history teaches wise men, to put trust in ideas,
> and not in circumstances.
> -- Emerson
>
>
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