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Date: Sat, 16 Mar 2002 14:06:37 -0800 (PST)
From: James McNaughton <jtm63@enteract.com>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/35989: 720KB floppies unusable
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>Number:         35989
>Category:       kern
>Synopsis:       720KB floppies unusable
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Mar 16 14:10:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     James McNaughton
>Release:        4.5-PRERELEASE
>Organization:
>Environment:
FreeBSD jamestown.21stcentury.net 4.5-PRERELEASE FreeBSD 4.5-PRERELEASE #0: Mon Jan  7 08:22:55 CST 2002     jtm@jamestown.21stcentury.net:/usr/obj/usr/src/sys/JAMESTOWN_II  i386      
>Description:
720K floppies cannot be mounted or used

fdformat /dev/fd0.720 works

newfs /dev/fd0 fd720 returns:
Warning: Block size restricts cylinders per group to 6.
Warning: 2656 sector(s) in last cylinder unallocated
/dev/fd0:       1440 sectors in 1 cylinders of 1 tracks, 4096 sectors
        0.7MB in 1 cyl groups (6 c/g, 12.00MB/g, 384 i/g)
super-block backups (for fsck -b #) at:
write error: 1439
newfs: wtfs - writecombine: Input/output error

OR

newfs_msdos /dev/fd0 fd720
/dev/fd0: 1400 sectors in 175 FAT12 clusters (4096 bytes/cluster)
bps=512 spc=8 res=1 nft=2 rde=512 sec=1440 mid=0xf0 spf=1 spt=9 hds=2 hid=0
newfs_msdos: /dev/fd0: Input/output error

Mounting filesystems doesn't work either:

mount_msdos /dev/fd0c /mnt
mount_msdos: /dev/fd0c: Input/output error
      
I tested four different disks and the disks with existing
filesystems were readable on a Smith Corona word processor.

1.44MB floppies work as expected.

All the floppies with existing file systems were readable in
the 3.x branch, which was the last time I tried them.
>How-To-Repeat:
Try to mount or newfs a 720KB floppy.      
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:

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