Re: 8.0-RC2 mangles msdosfs

Paul G Webster schrieb am 2009-11-03:
> 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#

*lol* just tried this myself and my fdisk output looks just as bad as yours:

******* Working on device da0 *******
parameters extracted from in-core disklabel are:
cylinders=242 heads=255 sectors/track=63 (16065 blks/cyl)

parameters to be used for BIOS calculations are:
cylinders=242 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 110 (0x6e),(unknown)
    start 1768187213, size 1701211749 (830669 Meg), flag 65
        beg: cyl 357/ head 114/ sector 46;
        end: cyl 10/ head 255/ sector 13
The data for partition 2 is:
sysid 255 (0xff),(Xenix bad blocks table)
    start 1953723749, size 980709985 (478862 Meg), flag 68
        beg: cyl 370/ head 108/ sector 37;
        end: cyl 78/ head 13/ sector 10
The data for partition 3 is:
sysid 116 (0x74),(unknown)
    start 1801683314, size 168652389 (82349 Meg), flag 20
        beg: cyl 371/ head 84/ sector 33;
        end: cyl 100/ head 101/ sector 32
The data for partition 4 is:
sysid 0 (0000),(unused)
    start 2885681152, size 54212 (26 Meg), flag 0
        beg: cyl 0/ head 0/ sector 0;
        end: cyl 0/ head 0/ sector 0

`file -s /dev/da0` reports:

/dev/da0: x86 boot sector, Microsoft Windows XP Bootloader (4.german) NTLDR,
code offset 0x58, OEM-ID "MSDOS5.0", sectors/cluster 8, reserved sectors 38,
Media descriptor 0xf8, heads 255, sectors 3903487 (volumes > 32 MB) , FAT (32
bit), sectors/FAT 3805, serial number 0x88e88370, unlabeled

`fdisk` in general seems to need some updates. this is the output if i call
`fdisk` without any args:

fdisk: mounted root fs resource doesn't match expectations (regexec returned
1)

alex

> 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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> >http://lists.freebsd.org/mailman/listinfo/freebsd-current
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