Arch Linux

dp

Member

From: Zürich, Switzerland

Registered: 2003-05-27

Posts: 3,378

Website

devfs: creating devices of high number while small num empty

i have a CF-2-PCMCIA adapter for accessing my compact-flash-chips

inserting it in the slot, it will make devfs to create the device: /dev/discs/disc2/part1

therefore my fstab-part for this looks like this:

/dev/discs/disc2/part1  /mnt/cf  vfat rw,users,noauto 0 0 

everything ok, i can use it, it works fine

the problem:
after first chip copied, i unmount and then remove the card out of the slot to change the CF

doing this makes /dev/discs/disc2/part1 disapear

inserting the card a second time generates /dev/discs/disc3/part1 .. but there is no /dev/discs/disc2/part1 in the system

removing and reinserting gives me  /dev/discs/disc4/part1 then ..5.., ..6.. and so on, but each time there is no longer a 2, 3, 4 or 2, 3, 4, 5 and so on

so either i have to change fstab each time i reinsert the card, or i have to mount by hand (as root :-( ) searching what "discX/part1" exists

any idea what happens? is this a bug in devfs? anyone with same things?

kernel 2.4.24 and 2.6.1 with same behaviour

---

The impossible missions are the only ones which succeed.

xor

Member

From: Sweden

Registered: 2003-03-20

Posts: 73

Re: devfs: creating devices of high number while small num empty

Hi!
Maybe stupid but, if "cardctl eject" is executed this would not happen or?
Understand that you maybe just remove the card attached to the pcmcia card, just give it a try and see if a new device is created or not after insertig again.
/xor

dp

Member

From: Zürich, Switzerland

Registered: 2003-05-27

Posts: 3,378

Website

Re: devfs: creating devices of high number while small num empty

forgot: i use hotplug

Hi!
Maybe stupid but, if "cardctl eject" is executed this would not happen or?
Understand that you maybe just remove the card attached to the pcmcia card, just give it a try and see if a new device is created or not after insertig again.
/xor

funny ... with cardctl eject and without hotplug it works fine (without changing numbers) ... the problem comes up, when i use hotplug instead of cardctl (=doing by hand)

-> xor, thanx for this note --- it remembered me that i changed to hotplug some months ago without realizing this issue with CF-PCMCIA

ok, i removed hotplugd and now doing it by hand

---

The impossible missions are the only ones which succeed.