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Compact Flash not automatically mounted but still visible

I have a linux box running kernel 2.6, when it boots it gets mounted by the following command in one of the startup scripts in /etc/init.d/
#Check compact flash
fsck -y /dev/hda1
# Mount CF
mount /mnt/CF

The entry in fstab is
/dev/hda1            /mnt/CF             ext2 defaults 0 0

It has worked flawlesly for a year, however I have recently had to upgrade the compact flash to a new model, unfortunately this model does not get mounted automatically, and when i issue the mount command from the command line instead of getting:
/dev/hda1 on /mnt/CF type ext2 (rw)
i don't get any entry for /mnt/CF

Still, and this is what reallly get's me, i can still access the card, and read/write the files, i thought this would be impossible as it's not mounted !. If i then issue manually  the mount /mnt/CF command again the CF gets mounted normally

Any idea of what could be going on? why is it failing and why is it that even if it's failing to mount i can access it?
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ealdaz
Asked:
ealdaz
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1 Solution
 
rindiCommented:
Can you post the complete fstab here? Maybe the card gets mounted to some other mount point?
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ealdazAuthor Commented:
Here it is:

#device                 mount point             type    flags           0 0
/dev/mtdblock3          /                       jffs2   defaults        0 0
tmpfs                   /var/tmp                tmpfs   defaults,size=4M 0 0
none                    /proc                   proc    defaults        0 0
none                    /dev/pts                devpts  defaults        0 0
/dev/hda1            /mnt/CF             ext2 defaults 0 0
/dev/sda1            /mnt/removable            vfat noauto,user 0 0

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rindiCommented:
Have you checked the last line, /dev/sda1   /mnt/removable? I'm thinking that could be your CF drive. Normally /dev/hda... are IDE disks anyway, and /dev/sd.... are used for SCSI, SATA, USB etc. and card readers are usually connected to USB ports.
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ealdazAuthor Commented:
Hi rindy, thanks for your help
My old CF was /dev/hda1 without a doubt (I've formatted it by accesing dev/hda )

If i understood you correctly you think that maybe this new CF does not appear as /dev/hda1 but maybe as /dev/sda1 ?

I'll check, but i would have thought that if that was the case it would appear under /mnt/removable not under /mnt/CF ?
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rindiCommented:
It wouldn't show up at first at all, as /mnt/removable isn't mounted automatically, but if you do a manual mount (mount /dev/sda1) it would go to /mnt/removable.
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ealdazAuthor Commented:
OK, what puzzles me however is that if i enter the /mnt/CF directory i can see the files in the compact flash ? and normally one can't enter a directory if it's not mounted to anything... if there is any extra information i can provide that would help?
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rindiCommented:
Not necessarily. A mount point is a folder on the HD (/mnt/CF) in your case, and of course it is possible to copy data to that folder, in particular as root. You'd have to check if this is the case with the flash card removed from the PC. If there are no files inside that folder then they actually are on your CF disk!
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ealdazAuthor Commented:
That is a very good point, i'll check it asap and let you know
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ealdazAuthor Commented:
Just checked, and as it turns out when the CF isn't mounted the files are copied on the /mnt/CF/ directory directly on the HD as you said, so i was indeed seeing the HD and not the CF.

If i insert the CF card , mount it with mount /mnt/CF and the and do a mount i get as expected:
/dev/hda1 on /mnt/CF type ext2 (rw)

However i still have the problem that when the machine first boots the CF doesn't get mounted, (the old one did), why could that be, do some CF cards need more time than others to be ready to be mounted?

This is the part of the script that mounts the CF, and it succeeds perfectly with the older CF

+ fsck -y /dev/hda1
fsck 1.35 (28-Feb-2004)
e2fsck 1.35 (28-Feb-2004)
fsck.ext2: No such device or address while trying to open /dev/hda1
Possibly non-existent or swap device?
+ mount /mnt/CF
mount: /dev/hda1 is not a valid block device

And as i say, once the booting process is over and i can log into the computer, by simply doing mount the CF gets mounted...

Why would it be failing at boot time?

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rindiCommented:
There could be a module or driver is needed and that isn't ready yet when the system tries mounting it.
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ealdazAuthor Commented:
How would you advice i modify the script to wait till it can mount the device?
Would something like this work?
while ! fsck -y /dev/hda1
           sleep 2
end

is the syntax right?
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rindiCommented:
I'm not very literate in scripts. I'd probably just put the mount command like when you mount it manually into a file inside /etc/init.d, then add a symlink to the runlevels you want it loaded in.
/etc/rc.3 or /etc/rc.5
The symlink filename would look similar to this:
Sxxmountcf

(S=Start, xx=numeric value where the lower number starts earlier).
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ealdazAuthor Commented:
That is where it is now, the thing is that mount fails because for whatever reason the CF is not ready, therefore I want to make sure i keep waiting and trying until it succeeds...

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rindiCommented:
Try using a higher number for xx, like 99 so it is processed last.
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ealdazAuthor Commented:
Should have said, it's 99 now
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pjedmondCommented:
One solution is to add the command:

mount /mnt/CF

to the end of /etc/rc.local

This gets executed after every other other init script is run.

Otherwise we need to try and find the source of the problem. Often this is as a result of modules not being installed correctly. Please provide the output from:

dmesg

and

lsmod

Once the CF is mounted. I should then be able to tell you what you need to alter to get this to work automatically. I also need the text in /etc/modules.conf (or modprobe.conf) depending which you have.
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ealdazAuthor Commented:
That is the solution I had opted for, as my startup scripts (S99viper) starts a ppp0 connection which is very slow (30s), so mounting at the end of the script is succesful.
However i would be very interested in understanding what's going on, so if you have a sec these are the outputs you have requested, after the device is mounted:

modules.conf
alias net-pf-10       off
alias net-pf-11       off
alias net-pf-18       off
alias net-pf-31       bluez

alias block-major-3       ide-probe-mod
alias block-major-22       ide-probe-mod

alias char-major-6      lp
alias char-major-10-250 hci_vhci
alias char-major-89      i2c-dev
alias char-major-108      ppp_generic

alias tty-ldisc-3      ppp_async
alias tty-ldisc-15       hci_uart
alias bt-proto-0       l2cap
alias bt-proto-2       sco

# The module names for IDE changed between 2.4.21 and 2.4.22. However
# 2.4.21 was broken for modules IDE so the changes have been backported
# to 2.4.21.
define KERNEL_VER `uname -r`
if KERNEL_VER >= 2.4.21
  alias ide-mod           ide-core
  alias ide-probe-mod     ide-detect
endif

# Include board specific configuration if it exists...
if -f /etc/modules.conf.board
include /etc/modules.conf.board
endif



lsmod:

Module                  Size  Used by
ide_disk               13664  2
ppp_deflate             4576  0
ppp_async               8992  1
crc_ccitt               1504  1 ppp_async
ppp_generic            22036  6 ppp_deflate,ppp_async
slhc                    6176  1 ppp_generic
ide_cs                  4836  1
ide_core               81528  2 ide_disk,ide_cs
pcmcia                 17960  3 ide_cs
pxa2xx_cs               2148  2
pxa2xx_core            10304  1 pxa2xx_cs
pcmcia_core            36092  3 ide_cs,pcmcia,pxa2xx_core
isp116x_hcd            14276  0
usbcore                94716  2 isp116x_hcd
ext2                   41444  1
ds1307                  7196  0


dmesg:

Linux version 2.6.11.9-arcom1 (ealdaz@EDU-LAPTOP) (gcc version 3.4.2) #1 Tue Jun 7 19:47:27 CEST 2005
CPU: XScale-PXA255 [69052d06] revision 6 (ARMv5TE)
CPU0: D VIVT undefined 5 cache
CPU0: I cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets
CPU0: D cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets
Machine: Arcom VIPER SBC
Memory policy: ECC disabled, Data cache writeback
Memory clock: 99.53MHz (*27)
Run Mode clock: 398.13MHz (*4)
Turbo Mode clock: 398.13MHz (*1.0, active)
On node 0 totalpages: 16384
  DMA zone: 16384 pages, LIFO batch:4
  Normal zone: 0 pages, LIFO batch:1
  HighMem zone: 0 pages, LIFO batch:1
Built 1 zonelists
Kernel command line: root=/dev/mtdblock2 rootfstype=jffs2 ro console=ttyS0,115200
Map ISA IRQ 3 to IRQ 104
Map ISA IRQ 4 to IRQ 105
Map ISA IRQ 5 to IRQ 106
Map ISA IRQ 6 to IRQ 107
Map ISA IRQ 7 to IRQ 108
Map ISA IRQ 10 to IRQ 109
Map ISA IRQ 11 to IRQ 110
Map ISA IRQ 12 to IRQ 111
Map ISA IRQ 9 to IRQ 112
Map ISA IRQ 14 to IRQ 113
Map ISA IRQ 15 to IRQ 114
IRQ2 (GPIO1): rising falling edges
IRQ1 (GPIO0): rising edges
IRQ25 (GPIO2): rising edges
IRQ27 (GPIO4): rising edges
IRQ26 (GPIO3): rising edges
PID hash table entries: 512 (order: 9, 8192 bytes)
Console: colour dummy device 80x30
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Memory: 64MB = 64MB total
Memory: 63104KB available (1423K code, 273K data, 64K init)
Calibrating delay loop... 397.31 BogoMIPS (lpj=1986560)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
CPU: Testing write buffer coherency: ok
NET: Registered protocol family 16
viper: setting CPU core voltage to 1.3V at 398.131MHz
viper: this hardware version has no version register.
PXA CPU frequency change support initialized
NetWinder Floating Point Emulator V0.97 (double precision)
JFFS2 version 2.2. (C) 2001-2003 Red Hat, Inc.
Serial: 8250/16550 driver $Revision: 1.90 $ 59 ports, IRQ sharing enabled
ttyS3 at MMIO 0x14300010 (irq = 27) is a 16550A
ttyS4 at MMIO 0x14300000 (irq = 26) is a 16550A
ttyS0 at MMIO 0x40100000 (irq = 15) is a FFUART
ttyS1 at MMIO 0x40200000 (irq = 14) is a BTUART
ttyS2 at MMIO 0x40700000 (irq = 13) is a STUART
io scheduler noop registered
smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico@cam.org>
IRQ1 (GPIO0): rising edges
eth0: SMC91C11xFD (rev 1) at 0xc4856300 IRQ 1 [nowait]
eth0: Ethernet addr: 00:80:66:10:28:19
eth0: PHY LAN83C183 (LAN91C111 Internal)
Probing VIPER flash device at physical address 0x04000000
Probing flash at physical address 0x04000000
flash: Found 1 x16 devices at 0x0 in 16-bit bank
flash: Found an alias at 0x2000000 for the chip at 0x0
 Intel/Sharp Extended Query Table at 0x0031
Using buffer write method
cfi_cmdset_0001: Erase suspend on write enabled
0: offset=0x0,size=0x20000,blocks=256
Unlocking VIPER flash device
VIPER flash unlocked
cmdlinepart partition parsing not available
Searching for RedBoot partition table in flash at offset 0x0
3 RedBoot partitions found on MTD device flash
Creating 3 MTD partitions on "flash":
0x00000000-0x0001f000 : "FIS directory"
0x0001f000-0x00020000 : "RedBoot config"
0x00020000-0x02000000 : "filesystem"
i2c /dev entries driver
NET: Registered protocol family 2
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP established hash table entries: 4096 (order: 3, 32768 bytes)
TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
NET: Registered protocol family 1
VFS: Mounted root (jffs2 filesystem) readonly.
Freeing init memory: 64K
usbcore: registered new driver usbfs
usbcore: registered new driver hub
116x: driver isp116x-hcd, Jun  7 2005
116x: Found ISP116x Host Controller
116x: ISP116x Host Controller, irq 25
isp116x-hcd isp116x-hcd: new USB bus registered, assigned bus number 1
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
eth0: link down
eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1
Linux Kernel Card Services
  options:  [pm]
IRQ55 (GPIO32): edges
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
IRQ31 (GPIO8): falling edges
Probing IDE interface ide0...
hda: TRANSCEND, CFA DISK drive
ide0 at 0xc4860000-0xc4860007,0xc486000e on irq 31
ide-cs: hda: Vcc = 3.3, Vpp = 0.0
CSLIP: code copyright 1989 Regents of the University of California
PPP generic driver version 2.4.2
PPP Deflate Compression module registered
hda: max request size: 128KiB
hda: 506016 sectors (259 MB) w/1KiB Cache, CHS=502/16/63
hda: cache flushes not supported
 hda: hda1
 hda: hda1
 hda: hda1
Eep. Block 0x00120000 taken from free_list had free_size of 0x0000005c!!
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pjedmondCommented:
Looks as if the module required by your card is in fact ide-cs. Unfortunately, the name of this driver has changed. Therefore adding the following command to you modules.conf has a good chance of solving it:

alias ide-cs ide_cs

which makes the kernel recognise that ide-cs requires the ide_cs module

Alternatively, you could add the following line:

post-install ide_core insmod ide_cs

Which will forceably install the correct module once the ide_core module is installed.

HTH:)

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ealdazAuthor Commented:
I have tried these two options in the modules.con , but fails to mount for each
alias ide-cs ide_cs

alias ide_cs ide-cs

I can try the other option, but i don't know where i should put

post-install ide_core insmod ide_cs

Thanks
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pjedmondCommented:
Ooops - wrong way round - Should be:

alias ide-cs ide_cs

This makes ide-cs aliased to the real module that exists in the kernel(ide_cs)

The alternative 'post-install' line can go anywhere after the:
--------8X---------
if KERNEL_VER >= 2.4.21
  alias ide-mod           ide-core
  alias ide-probe-mod     ide-detect
endif
--------8X---------
bit

HTH:)
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ealdazAuthor Commented:
What I mean is that I tried putting
alias ide-cs ide_cs
in /etc/modules.conf
and it didn't work
and then tried the other way around
alias ide-cs ide_cs
and didn't work either

I'll try the post-install option
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pjedmondCommented:
NP - Check the output of dmesg once it has started up. This might provide you with additional clues as to what you need. The fundamental start point is that your kernel is working on the new name (ide_cs), where as the cardflash appears to want the old one (ide-cs).

HTH:)
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ealdazAuthor Commented:
OK, i will check dmesg.
Just to double check that i understood.
You know the kernel is working on ide_cs because that's what's been shown by lsmod
However the CF card wants ide-cs because that's what shown by dmesg
correct?
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pjedmondCommented:
Yep - that's what it looks like. ide-cs got renamed to ide_cs somewhere in the 2.4 kernel development.

Basically, we're trying to 'force' the boot process to load ide_cs when a device appears to be asking for ide-cs. (Alternatively, we can forceably 'insmod ide_cs' at some time during the boot process which will also work.

The current process sticking the mount in the /etc/rc.local works....but doesn't quite have the 'elegance' that I'd like to see. Unfortunately, it's a fact of life with all systems that are reasonably complex, that it is often easier to go for the sightly more botched 'approach'...then again, it's always nice to understand exactly what's happening, in case you encounter the problem again:)

 
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