Re: [ MOUNT ] Can not mount compact flash drive hda (ext3) with 2.6.16

From: Helge Hafting
Date: Tue May 16 2006 - 07:15:16 EST

Mario Ohnewald wrote:

Hello List,

i am booting a linux box via NFS. When it boot it with a 2.4.32 kernel i CAN mount my compact flash drive

If i boot a 2.6.16 kernel i CAN NOT.

hdaX is ext3 and ext3 is compiled into the kernel.
Am i missing a kernel option?

More infos:

~# fdisk -l

Disk /dev/hda: 1024 MB, 1024450560 bytes
32 heads, 63 sectors/track, 992 cylinders
Units = cylinders of 2016 * 512 = 1032192 bytes

Device Boot Start End Blocks Id System
/dev/hda1 * 1 73 73552+ 83 Linux
/dev/hda2 74 751 683424 83 Linux
/dev/hda3 752 799 48384 83 Linux
/dev/hda4 800 992 194544 83 Linux

~# mount
rootfs on / type rootfs (rw)
/dev/root on / type nfs
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
usbfs on /proc/bus/usb type usbfs (rw)
/dev/root on /dev/.static/dev type nfs
none on /dev type tmpfs (rw)
tmpfs on /tmp type tmpfs (rw)
devpts on /dev/pts type devpts (rw)
tmpfs on /dev/shm type tmpfs (rw)

proc/mounts is the interesting one - the "mount" command
gives you /etc/mtab which may be wrong.

~# cat /proc/mounts
rootfs / rootfs rw 0 0
/dev/root / nfs
rw,v2,rsize=4096,wsize=4096,hard,nolock,proto=udp,addr= 0 0
proc /proc proc rw 0 0
sysfs /sys sysfs rw 0 0
usbfs /proc/bus/usb usbfs rw 0 0
/dev/root /dev/.static/dev nfs
rw,v2,rsize=4096,wsize=4096,hard,nolock,proto=udp,addr= 0 0
none /dev tmpfs rw 0 0
tmpfs /tmp tmpfs rw 0 0
devpts /dev/pts devpts rw 0 0
tmpfs /dev/shm tmpfs rw 0 0

no hda in use here

~# lsof | grep hda
<no result>

~# dmesg | grep hda
ide0: BM-DMA at 0xe000-0xe007, BIOS settings: hda:pio, hdb:pio
hda: max request size: 128KiB
hda: 2000880 sectors (1024 MB) w/2KiB Cache, CHS=1985/16/63
hda: hda1 hda2 hda3 hda4

~# mount -t ext3 /dev/hda1 /mnt/
mount: /dev/hda1 already mounted or /mnt/ busy

There is a hda, it is a 1GB disk, and it has four partitions. The
four partitions are correct?

There are other ways hda1 could be busy, such as used for swap
or member of a RAID array. But I guess this is not the case here?

~# mkfs.ext3 /dev/hda1
mke2fs 1.38 (30-Jun-2005)
/dev/hda1 is apparently in use by the system; will not make a filesystem

Well, you could try the -F (force) option and see what happens.
Just make sure "hda1" doesn't somehow refer to another device
in the system.

You may also want to try
cfdisk /dev/hda
and see that the partition layout is the same as with 2.4,
and you might want to check if cat /dev/hda > /dev/null works.
This is all very strange, but more data might get more people interested.

Helge Hafting
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at