[issue1278] disklabel64 can't label new partition

["Simon 'corecode' Schubert \(via DragonFly issue tracker\)" <sinknull@xxxxxxxxxxxxxxxxxxxxxxx>]

New submission from Simon 'corecode' Schubert <corecode@fs.ei.tum.de>:

The kernel won't let disklabel write the label unless I've touched the slice before:

sweatshorts % sudo dd if=/dev/zero of=/dev/ad6
^C25372+0 records in
25371+0 records out
12989952 bytes transferred in 2.380336 secs (5457192 bytes/sec)
1 sweatshorts % sudo fdisk -IB /dev/ad6
******* Working on device /dev/ad6 *******
fdisk: invalid fdisk partition table found
Warning: ending cylinder wraps, using all 1's
sweatshorts % sudo fdisk -IB /dev/ad6
******* Working on device /dev/ad6 *******
Warning: ending cylinder wraps, using all 1's
sweatshorts % sudo disklabel64 -w ad6s1 auto
disklabel64: ioctl DIOCWDINFO64: label magic number or checksum is wrong!
(disklabel or kernel is out of date?)
1 sweatshorts % dd if=/dev/ad6s1 of=/dev/null count=100
100+0 records in
100+0 records out
51200 bytes transferred in 0.013747 secs (3724455 bytes/sec)
sweatshorts % sudo disklabel64 -w ad6s1 auto
sweatshorts %

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messages: 6145
nosy: corecode
priority: urgent
status: unread
title: disklabel64 can't label new partition

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DragonFly issue tracker <bugs@lists.dragonflybsd.org>
<http://bugs.dragonflybsd.org/issue1278>
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