Date: Wed, 24 Jun 2009 16:03:39 +0100 From: Richard Tector <richard@tector.org.uk> To: freebsd-stable@freebsd.org Subject: sade(8) on a gmirror device Message-ID: <4A42404B.5030206@tector.org.uk>
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A little background - the system in question , running 7.2-RELEASE has 2
1TB disks in a gmirror, ez0. ad4 and ad6 are the two providers for the
gmirror device. It was created after a 30GB slice had been created on
ad4 for the various system partitions required.
This system is running fine, with the partitions mounted from
/dev/mirror/ez0s1a for example.
What I would now like to do is create a second slice from the remaining
900-odd GB left on the mirror. However, sade (and sysinstall) do not
display the ez0 device to operate on, only the providers: ad4 and ad6.
fdisk(8) will happily read the partition table from the mirror:
******* Working on device /dev/mirror/ez0 *******
parameters extracted from in-core disklabel are:
cylinders=121601 heads=255 sectors/track=63 (16065 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=121601 heads=255 sectors/track=63 (16065 blks/cyl)
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 62914257 (30719 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 1023/ head 15/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
However, dumping the partition table and passing back to fdisk also fails:
ezekiel# fdisk -f fd.e
******* Working on device /dev/mirror/ez0 *******
fdisk: Geom not found: "ez0"
fdisk: Failed to write sector zero
This also occurs if I set kern.geom.debugflags to 16, by the way.
Does anyone have any suggestions for how to proceed? The only method I
can think of is to break the mirror, add the slice to ad4, then recreate
the mirror. Not being able to use sade on a gmirror is a real PITA.
Regards,
Richard
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