Date: Wed, 12 Feb 2003 17:07:01 -0500 From: "Doug Reynolds" <mav@wastegate.net> To: "northern snowfall" <dbailey27@ameritech.net>, "William Palfreman" <william@palfreman.com> Cc: "hardware@FreeBSD.ORG" <hardware@FreeBSD.ORG>, "questions@FreeBSD.ORG" <questions@FreeBSD.ORG> Subject: Re: 5.25" Floppy Message-ID: <20030212220730.B468348463@wastegate.net> In-Reply-To: <20030207180944.F283@ndhn.yna.cnyserzna.pbz>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, 7 Feb 2003 18:40:24 +0000 (GMT), William Palfreman wrote: >On Fri, 7 Feb 2003, northern snowfall wrote: > >> Morning, all; >> I'm trying to get a Mitsumi D509V3 1.2MB 5.25" floppy drive >> to work on FreeBSD 4.2.6. > >Cool. My father still has a 5.25" drive in production use - he has >large numbers of 5.25 disks containing old work, and maybe once a >year needs something off one of them. Works fine on his W2k box. > >> The operating system reports the drive >> is available and definitely makes contact with the drive (visual >> confirmation: LED). The issue is during read/write from the >> drive. Error message: >> fd0c: hard error reading fsbn 0 (No status) >> I have the proper drive type set in the BIOS. FreeBSD seems to >> agree according to the dmesg: >> fd0: <1200-KB 5.25" drive> on fdc0 drive 0 >> I've been doing simple read tests using: >> dd if=/dev/fd0 count=1 bs=512 | hexdump ; >> Any suggestions? > >Drive might be broken, disk might be broken, disk might not be >formated, and finally make sure you know what kind of 5.25 both the >drive and the disk are. 8088/86 machines stated off with single sided 8 >sector one @160k, then double sided 8 sector (320k), then single sided 9 >sector (180k), then double sided 9 sector (360k). That was the >standard. AT machines (i.e. 286s and later 386s & 486s) used 1.2Mb >5.25" disks. These AT drives could read 360k PC disks (PC = 8086/88, >BTW) but if you wrote to one there was a very good chance it would never >be readable by a PC again, because the 1.2Mb AT drive had a read/write >head 1/3 of the size of the 360Kb PC drive, and often the mark it left >was too small to be read by larger PC heads. For that reason I always >treated 360k disks as read-only media on 1.2Mb drives. correct; however, you can also format a 360K disk as a 360K High Density, so you could read or write to it from a 1.2M, and still read it from a 360k (but not write). --- doug reynolds | the maverick | mav@wastegate.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030212220730.B468348463>