Date: Tue, 28 Jul 1998 11:18:04 -0700 (PDT) From: david.myers@Corp.Sun.COM To: freebsd-hackers@FreeBSD.ORG, freebsd-questions@FreeBSD.ORG Subject: Questions about vn driver (More info...) Message-ID: <199807281818.LAA21352@concord.Corp.Sun.COM>
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Regarding my attempt to format a vn disk image as UFS:
I found Keith Jones' post (Message-ID:
<19980715103538.41845@blueberry.co.uk>) in freebsd-bugs regarding a
similar issue. He created a disktab entry for an mfs file system (Ah!
MFS! Is that documented somewhere?), and used that to disklabel his
vnconfig'd device. But following his recipe exactly, I get the
following when issuing the 'disklabel -w /dev/vn0 400M':
disklabel: ioctl DIOCWDINFO: Operation not supported by device
I'm using FreeBSD-2.2.6 with the PAO-980430 laptop extensions.
Keith's recipe is copied below. He apparently didn't have any problems
disklabeling his vn disk...
Any help appreciated.
-David
-------------
This is what I did:
# dd if=/dev/zero of=/usr/diskimage bs=1024 count=409600
# vnconfig -c -s labels /dev/vn0 /usr/diskimage
# disklabel -w /dev/vn0 400M
# newfs /dev/vn0a
# newfs /dev/vn0e
# newfs /dev/vn0f
# mount /dev/vn0a /mnt
# cd /mnt
# mkdir usr
# mkdir var
# mount /dev/vn0e /mnt/var
# mount /dev/vn0f /mnt/usr
The /etc/disktab entry for 400M is as follows:
400M|400M Disk:\
:ty=mfs:se#512:nt#16:ns#32:nc#1600: \
:pa#65536:oa#0:ta=4.2BSD:ba#4096:fa#512:\
:pb#65536:ob#65536:tb=swap: \
:pc#819200:oc#0: \
:pe#61440:oe#131072:te=4.2BSD:be#4096:fe#512: \
:pf#626688:of#192512:tf=4.2BSD:bf#4096:ff#512:
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