Re: 8.0-RC2 mangles msdosfs

As an example, this is a 1GB fat32 disk.


da0 at umass-sim0 bus 0 target 0 lun 0
da0: <LG USB Drive 1100> Removable Direct Access SCSI-0 device
da0: 1.000MB/s transfers
da0: 956MB (1957888 512 byte sectors: 64H 32S/T 956C)
desktop1# ls /dev | grep da0~
desktop1# ls /dev | grep da0
da0
desktop1# fdisk /dev/da0
******* Working on device /dev/da0 *******
parameters extracted from in-core disklabel are:
cylinders=956 heads=64 sectors/track=32 (2048 blks/cyl)

parameters to be used for BIOS calculations are:
cylinders=956 heads=64 sectors/track=32 (2048 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 114 (0x72),(unknown)
     start 778135908, size 1141509631 (557377 Meg), flag 6f
	beg: cyl 357/ head 116/ sector 40;
	end: cyl 357/ head 32/ sector 45
The data for partition 2 is:
sysid 101 (0x65),(Novell Netware/386 3.xx)
     start 168689522, size 1936028240 (945326 Meg), flag 69
	beg: cyl 288/ head 115/ sector 43;
	end: cyl 367/ head 114/ sector 50
The data for partition 3 is:
sysid 121 (0x79),(QNX4.x 3rd part)
     start 1869881465, size 1936028192 (945326 Meg), flag 73
	beg: cyl 366/ head 32/ sector 33;
	end: cyl 357/ head 32/ sector 43
The data for partition 4 is:
sysid 13 (0x0d),(unknown)
     start 0, size 3637226496 (1775989 Meg), flag 74
	beg: cyl 372/ head 97/ sector 50;
	end: cyl 0/ head 10/ sector 0
desktop1#


On Tue, 03 Nov 2009 01:28:10 -0000, Mark Linimon <linimon_at_lonesome.com>  
wrote:

> On Tue, Nov 03, 2009 at 02:03:29AM +0100, Alexander Best wrote:
>> i guess the freebsd-fs_at_ guys know about these problems but don't have
>> the time to deal with it.  most of them are probably working on zfs.
>
> AFAIK there are only a handful of people working on ZFS.
>
> We certainly need more people willing to work on filesystems code.  In
> general it does have a large learning curve, so it's not as attractive
> as some of the other areas.  That's probably why, as the kernel has
> undergone radical changes (e.g. for SMP) over time, that some of the
> fs code has not kept up.
>
> mcl
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