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From: Jean-Marc Zucconi <jmz@cabri.obs-besancon.fr>
To: freebsd-hackers@freebsd.org
Subject: fdisk headache
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Hi,

I try to add another disk, but it seems that something has changed
since my last drive installation because fdisk doesnt want to write a
correct information.
My new drive is probed as:
	(ncr1:6:0): "QUANTUM FIREBALL_TM3200S 300N" type 0 fixed SCSI 2
	sd4(ncr1:6:0): Direct-Access 
	sd4(ncr1:6:0): 10.0 MB/s (100 ns, offset 8)
	3067MB (6281856 512 byte sectors)
	sd4(ncr1:6:0): with 6810 cyls, 5 heads, and an average 184
	sectors/track
(why 6810*5*184 != 6281856 ???)

When I start fdisk it tells me that the drive has 19035cyl, 6heads,
55sec/trk. Wanting to change the values to 6810/5/184, I get
	The data for partition 3 is:
	sysid 165,(FreeBSD/NetBSD/386BSD)
	    start 1, size 6265199 (3059 Meg), flag 80
	        beg: cyl 0/ sector 2/ head 0;
	        end: cyl 666/ sector 55/ head 5
The last value is obviously wrong, but if try to change it to
something more realistic, eg. 6810/5/183, fdisk interpret my values as
666/55/5 !!!!!

The real problem is then when I want to label the disk: I get

	ioctl DIOCWLABEL: Operation not supported by device
	sd4s4: type 0xa5, start 1, end = 6265199, size 6265199 
	sd4s4: C/H/S end 666/5/55 (220109) != end 6265199: invalid
	sd4: cannot find label (no disk label)
	sd4s4: cannot find label (no disk label)

Is there a solution? I don't care if the geometry is incorrect as long
I can disklabel/newfs the drive and use the 3067 Mb!!!

Jean-Marc
 _____________________________________________________________________________
 Jean-Marc Zucconi       Observatoire de Besancon       F 25010 Besancon cedex
                   PGP Key: finger jmz@cabri.obs-besancon.fr
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