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?
/\/\ \/\/
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