Problem with msdosfs disklabels and geometry

[Felix Resch <fuller%droog.sdf-eu.org@localhost>]

Hi everyone!

As suspending by zzz(8) and resuming works on my IBM Thinpad T43 i wanted to 
try with 
suspend-to-disk by using sysutils/tphdisk. As i got stuck with
 'mount_msdos: /dev/wd0j on /mnt/test: Invalid argument'
for some time now and various fiddling with options on newfs and disklabel 
didnt help,
i ask for help.

Here come the facts:

$ disklabel wd0                                                        
# /dev/rwd0d:
type: unknown
disk: FUJITSU MHV2120
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 232581
total sectors: 234441648
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0 

16 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a:  20978496  19760013     4.2BSD   2048 16384     0  # (Cyl.  19603*-  40415*)
 b:    525861  40738509       swap                     # (Cyl.  40415*-  40936*)
 c:  21504357  19760013     unused      0     0        # (Cyl.  19603*-  40936*)
 d: 234441648         0     unused      0     0        # (Cyl.      0 - 232580)
 e:   2464497        63      MSDOS                     # (Cyl.      0*-   2444)
 k: 193171167  41264433      MSDOS                     # (Cyl.  40936*- 232574)


$ fdisk wd0                                                              
Disk: /dev/rwd0d
NetBSD disklabel disk geometry:
cylinders: 232581, heads: 16, sectors/track: 63 (1008 sectors/cylinder)
total sectors: 234441648

BIOS disk geometry:
cylinders: 1023, heads: 240, sectors/track: 63 (15120 sectors/cylinder)
total sectors: 234441648

Partition table:
0: hidden Windows/95 FAT32 (sysid 27)
    start 63, size 2464497 (1203 MB, Cyls 0-162)
1: <UNUSED>
2: Extended partition (sysid 5)
    start 19759950, size 214675650 (104822 MB, Cyls 1306/210/1-15504)
3: <UNUSED>
Extended partition table:
E0: NetBSD (sysid 169)
    bootmenu: netbsd
    start 19760013, size 21504357 (10500 MB, Cyls 1306/210/1-2729/29/63)
E1: Primary DOS with 32 bit FAT - LBA (sysid 12)
    start 41264433, size 193171167 (94322 MB, Cyls 2729/30/1-15504)
Bootselector enabled, timeout 4 seconds.
No active partition.
Drive serial number: 295375259 (0x119b119b)

Before everything began the disklabel looked like:

 a:  20978496  19760013     4.2BSD   2048 16384     0  # (Cyl.  19603*-  40415*)
 b:    525861  40738509       swap                     # (Cyl.  40415*-  40936*)
 c:  21504357  19760013     unused      0     0        # (Cyl.  19603*-  40936*)
 d: 234441648         0     unused      0     0        # (Cyl.      0 - 232580)
 e:    198387        63 Linux Ext2      0     0        # (Cyl.      0*-    196*)
 f:  19551105    208845       NTFS                     # (Cyl.    207*-  19603*)
 k: 193171167  41264433      MSDOS                     # (Cyl.  40936*- 232574)

Then i removed my mostly unused winxp partition at the
beginning of my disk, cleared the area (somewath brutal?) with
'dd if=/dev/zero of=/dev/wd0d seek=1 bs=512 count=1000'
edited the disklabel, by combining slice e and f and changed type to MSDOS.

# newfs_msdos /dev/rwd0e                                
/dev/rwd0e: 233984608 sectors in 29248076 FAT32 clusters (4096 bytes/cluster)
MBR type: 11
bps=512 spc=8 res=32 nft=2 sec=234441648 mid=0xf0 spt=63 hds=16 hid=0
 bsec=234441648 bspf=228501 rdcl=2 infs=1 bkbs=2

# mount_msdos /dev/wd0e /mnt/test 
mount_msdos: /dev/wd0e on /mnt/test: Invalid argument

Has this something to do with ?
- the layout of the disk(-label)
- the difference in 'NetBSD disklabel disk geometry' and 'BIOS disk geometry' 
as reported by fdisk
- a bug in {mount|newfs}_msdosfs

thx a lot for any clarification!
felix

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