Yes, the process for making a floppy useful to an OS is the same as any
other computer media.
The common "1.44" MB floppy is actually 2.0 MB (12 Mbits) worth of data.
However, a controller chip (usually an NEC 765 or equivalent) is used to
write certain patterns onto the diskette; for a standard
Le Tue, Nov 15, 2022 at 04:04:05PM -0800, Michael Cheponis a écrit :
>[...]
>
> I see other unexpected behavior; when I copy to identical files that are
> exactly 1/2 of 1.4 MB long
> # ll f1 f2
>
> -rw-r--r-- 1 mac wheel 737280 Nov 15 02:53 f1
> -rw-r--r-- 1 mac wheel 737280 Nov 15 02:54
On Tue, Nov 15, 2022 at 04:04:05PM -0800, Michael Cheponis wrote:
> Nov 15 23:42:22 arm64 /netbsd: [ 1728677.3990874] sd1(umass1:0:0): not
> ready, data = 00 00 00 00 3a 00 00 00 00 00
> Nov 15 23:42:22 arm64 /netbsd: [ 1729062.2630115] sd1: detached
> Nov 15 23:42:22 arm64 /netbsd: [
Hmm, this is getting more interesting:
Nov 14 20:55:16 arm64 /netbsd: [ 1632636.5571825] umass1 at uhub2 port 1
configuration 1 interface 0
Nov 14 20:55:16 arm64 /netbsd: [ 1632636.5601839] umass1: TEACV0.0 (0x0644)
TEACV0.0 (0x), rev 1.10/2.00, addr 3
Nov 14 20:55:16 arm64 /netbsd: [
On Mon, Nov 14, 2022 at 09:33:07AM -0800, Michael Cheponis wrote:
> *# scsictl sd1 format/dev/rsd1: device had unknown status 4*
Is there any other message (on console) ?
There are 3 cases that produce a 'status 4':
- "have short sense" (printed only with SCSI debugging)
- "passthrough: adapter
*# scsictl sd1 format/dev/rsd1: device had unknown status 4*
The dd trick seems to work only if the diskette is pre-formatted.
great suggestions, thank you. I'll keep whacking at this.
-Mike
On Mon, Nov 14, 2022 at 9:11 AM Michael van Elst wrote:
> michael.chepo...@gmail.com (Michael
michael.chepo...@gmail.com (Michael Cheponis) writes:
>I would think 'fdformat' would work, but...
>*arm64# ./fdformat -f /dev/rsd1
>*fdformat: Device `/dev/rsd1' does not support floppy formatting:
>Inappropriate ioctl for device*
Try 'scsictl sd1 format'.
I found 2 old amd64 floppy images from 2.0. No idea why I still have these:
-rwxr--r-- 1 andy andy 1474560 Nov 30 2004 boot1.fs
-rwxr--r-- 1 andy andy 1474560 Nov 30 2004 boot2.fs
Can you try writing a file of that size to one of those /dev/rsd files
using dd?
(The man page for
I would think 'fdformat' would work, but...
*[ 1063553.609981] umass1 at uhub2 port 3 configuration 1 interface 0*
*[ 1063553.612982] umass1: TEACV0.0 (0x0644) TEACV0.0 (0x), rev
1.10/2.00, addr 3*
*[ 1063553.620984] umass1: using UFI over CBI with CCI*
*[ 1063553.621985] atapibus0 at umass1:
