GEOM weirdness with SD flash reader?
Nate Lawson
nate at root.org
Sun Jul 1 19:44:06 UTC 2007
Simply trying to mount a FAT filesystem in an external USB SD flash
reader. The reader works fine, no errors in dmesg.
deenlo# fdisk da2
******* Working on device /dev/da2 *******
parameters extracted from in-core disklabel are:
cylinders=982 heads=64 sectors/track=32 (2048 blks/cyl)
parameters to be used for BIOS calculations are:
cylinders=982 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 6 (0x06),(Primary 'big' DOS (>= 32MB))
start 243, size 2011917 (982 Meg), flag 0
beg: cyl 0/ head 3/ sector 55;
end: cyl 998/ head 3/ sector 3
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
deenlo# mount -t msdosfs /dev/da2s1 /mnt/dos
mount_msdosfs: /dev/da2s1: No such file or directory
deenlo# mount -t msdosfs /dev/da2 /mnt/dos
mount_msdosfs: /dev/da2: Invalid argument
deenlo# mount -t msdosfs /dev/da2s1 /mnt/dos
[success]
So I'm guessing GEOM had to decide to create /dev/da2s1 after I tried to
mount /dev/da2 directly? Nothing else would create the da2s1 device.
Once the device was created with make_dev(), repeated unmounts/mounts
work fine.
--
Nate
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