Michael R. Wayne
2006-Aug-03 05:51 UTC
fdisk problem on 3ware based system (6.1-RELEASE-p3)
I see to have an fdisk issue on one of our boxes with a 3ware card. Relevant
lines from dmesg:
twe0: <3ware Storage Controller. Driver version 1.50.01.002> port
0x9c00-0x9c0f mem 0xfc000000-0xfc7fffff irq 20 at device 1.0 on pci2
twe0: 2 ports, Firmware FE8S 1.05.00.068, BIOS BE7X 1.08.00.048
twed0: <Unit 0, TwinStor, Normal> on twe0
twed0: 76318MB (156299440 sectors)
This started out because I am unable to create a new partition on
a machine running 6.1-RELEASE-p3 and am beginning to suspect something
is wrong in fdisk. If I run sysinstall and go to the partition
editor, I get the following, which seems correct:
Disk name: twed0 FDISK Partition Editor
DISK Geometry: 9729 cyls/255 heads/63 sectors = 156296385 sectors (76316MB)
Offset Size(ST) End Name PType Desc Subtype Flags
0 63 62 - 12 unused 0
63 31455207 31455269 twed0s1 8 freebsd 165
31455270 58717575 90172844 twed0s2 8 freebsd 165
90172845 66126595 156299439 - 12 unused 0
But, I am unable to create a third partition. Every time I do that, I get:
ERROR: Unable to write data to disk twed0!
This machine is not running with an elevated security level:
kern.securelevel: -1
So, I decided to go in with fdisk and see what was up. It looks
like fdisk is very confused on partition 2, which is likely
why I can not create a partition 3 (even using fdisk):
> fdisk /dev/twed0
******* Working on device /dev/twed0 *******
parameters extracted from in-core disklabel are:
cylinders=9729 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=9729 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 31455207 (15358 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 1023/ head 254/ sector 63
The data for partition 2 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 31455270, size 58717575 (28670 Meg), flag 0
beg: cyl 1023/ head 255/ sector 63;
end: cyl 1023/ head 254/ sector 63 <---------------- !!
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
At this point, I'm suspecting that fdisk is computing something
incorrectly and am not sure how to proceed as I'd prefer not to
corrupt my disk label. Before I consider filing a PR, is this a
known problem?
/\/\ \/\/
Am 03.08.2006 um 07:50 schrieb Michael R. Wayne:> But, I am unable to create a third partition. Every time I do > that, I get: > ERROR: Unable to write data to disk twed0!Are there any mounted filesystems in those two first slices? Then geom won't allow you to modify the partition table. You need to boot off a CD, or set a sysctl to allow writing anyway (see geom(4)). Stefan -- Stefan Bethke <stb@lassitu.de> Fon +49 170 346 0140