Skip to contentSkip to conversation

USB CF reader reboots PC

DISCUSSION Murray J. Root 4 participants 8 messages Jan 8, 2003 – Jan 9, 2003

lore
Share & tools
lore

Murray J. Root

author
#0 lore raw

ASUS P4S533 (SiS645DX chipset)
P4 2GHz
1G PC2700 RAM
SanDisk SDDR-77 ImageMate Dual Card Reader (using only CF cards)

----------------------------
devfs compiled in to kernel, devfs=nomount in lilo.conf

Insert CF card. mount it. cd to it, do reads and/or writes umount card. remove card.
insert a different card (does not happen if the same card is used) mount it. system reboots. logs are corrupted

Doesn't happen every time for read - sometimes I can read 2 or 3 cards first Happens every time for write - if I write to a card then changing cards causes a reboot

----------------------------
devfs=mount in lilo.conf

Insert CF card.
ls /dev shows sda and sda1
mount it.
ls /dev shows sda - no sda1
cd to mounted CF card
process hangs, sd-mod & usb-storage "busy"
rmmod -f usb-storage or sd-mod causes PC to stop (keyboard & mouse unresponsive, wmfire frozen, net disconnects)

reboot
Insert CF card.
ls /dev shows sda & sda1
mount it.
ls /dev shows sda - no sda1
umount it
ls /dev shows sda - no sda1
modprobe -r sd-mod && modprobe sd-mod
ls /dev shows sda & sda1

Signature · 8 lines
Murray J. Root
------------------------------------------------
DISCLAIMER: http://www.goldmark.org/jeff/stupid-disclaimers/
------------------------------------------------
Mandrake on irc.freenode.net:
  #mandrake & #mandrake-linux = help for newbies 
  #mdk-cooker = Mandrake Cooker
  #cooker = moderated Mandrake Cooker
author
#1 lore raw

Ooops - kernel 2.5.5[234]

Quoted 55 lines · Murray J. Root

ASUS P4S533 (SiS645DX chipset)
P4 2GHz
1G PC2700 RAM
SanDisk SDDR-77 ImageMate Dual Card Reader (using only CF cards)

----------------------------
devfs compiled in to kernel, devfs=nomount in lilo.conf

Insert CF card. mount it. cd to it, do reads and/or writes umount card. remove card.
insert a different card (does not happen if the same card is used) mount it. system reboots. logs are corrupted

Doesn't happen every time for read - sometimes I can read 2 or 3 cards first Happens every time for write - if I write to a card then changing cards causes a reboot

----------------------------
devfs=mount in lilo.conf

Insert CF card.
ls /dev shows sda and sda1
mount it.
ls /dev shows sda - no sda1
cd to mounted CF card
process hangs, sd-mod & usb-storage "busy"
rmmod -f usb-storage or sd-mod causes PC to stop (keyboard & mouse unresponsive, wmfire frozen, net disconnects)

reboot
Insert CF card.
ls /dev shows sda & sda1
mount it.
ls /dev shows sda - no sda1
umount it
ls /dev shows sda - no sda1
modprobe -r sd-mod && modprobe sd-mod
ls /dev shows sda & sda1

Signature · 14 lines
Murray J. Root
------------------------------------------------
DISCLAIMER: http://www.goldmark.org/jeff/stupid-disclaimers/
------------------------------------------------
Mandrake on irc.freenode.net:
  #mandrake & #mandrake-linux = help for newbies 
  #mdk-cooker = Mandrake Cooker
  #cooker = moderated Mandrake Cooker

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
Signature · 8 lines
Murray J. Root
------------------------------------------------
DISCLAIMER: http://www.goldmark.org/jeff/stupid-disclaimers/
------------------------------------------------
Mandrake on irc.freenode.net:
  #mandrake & #mandrake-linux = help for newbies 
  #mdk-cooker = Mandrake Cooker
  #cooker = moderated Mandrake Cooker
#2 lore raw
Quoted 21 lines · Murray J. Root

Ooops - kernel 2.5.5[234]

Quoted 17 lines · Murray J. Root

ASUS P4S533 (SiS645DX chipset)
P4 2GHz
1G PC2700 RAM
SanDisk SDDR-77 ImageMate Dual Card Reader (using only CF cards)

----------------------------
devfs compiled in to kernel, devfs=nomount in lilo.conf

Insert CF card. mount it. cd to it, do reads and/or writes umount card. remove card.
insert a different card (does not happen if the same card is used) mount it. system reboots. logs are corrupted

Doesn't happen every time for read - sometimes I can read 2 or 3 cards first Happens every time for write - if I write to a card then changing cards causes a reboot

[snip]

Somewhat similar vein, but a different set of symptoms, I've seen a RedHat box not see that the CF card changed... (USB SanDisk CF & SD reader, also using only CF cards.)

insert 128MB CF card.
everything is ok.
remove 128MB CF card, still see 128MB partition
insert 256MB CF card.
see 128MB partition.
(based on /proc/partitions)

I've not followed this up to figure out why yet.
You might check that situation to see if yours is related at all.

Eli
--------------------. "If it ain't broke now,
Eli Carter \ it will be soon." -- crypto-gram
eli.carter(a)inet.com `-------------------------------------------------

author
#3 lore raw
Quoted 36 lines · Eli Carter
Quoted 22 lines · Murray J. Root

Ooops - kernel 2.5.5[234]

Quoted 18 lines · Murray J. Root

ASUS P4S533 (SiS645DX chipset)
P4 2GHz
1G PC2700 RAM
SanDisk SDDR-77 ImageMate Dual Card Reader (using only CF cards)

----------------------------
devfs compiled in to kernel, devfs=nomount in lilo.conf

Insert CF card. mount it. cd to it, do reads and/or writes umount card. remove card.
insert a different card (does not happen if the same card is used) mount it. system reboots. logs are corrupted

Doesn't happen every time for read - sometimes I can read 2 or 3 cards first
Happens every time for write - if I write to a card then changing cards causes a reboot

[snip]

Somewhat similar vein, but a different set of symptoms, I've seen a RedHat box not see that the CF card changed...
(USB SanDisk CF & SD reader, also using only CF cards.)

insert 128MB CF card.
everything is ok.
remove 128MB CF card, still see 128MB partition
insert 256MB CF card.
see 128MB partition.
(based on /proc/partitions)

Quoted 2 lines

I've not followed this up to figure out why yet.
You might check that situation to see if yours is related at all.

Using Mandrake Cooker and nope - it sees the change That's actually part of the symptoms - if I put the same card back in, no problem. It's only if I use a different card that it reboots.

Signature · 8 lines
Murray J. Root
------------------------------------------------
DISCLAIMER: http://www.goldmark.org/jeff/stupid-disclaimers/
------------------------------------------------
Mandrake on irc.freenode.net:
  #mandrake & #mandrake-linux = help for newbies 
  #mdk-cooker = Mandrake Cooker
  #cooker = moderated Mandrake Cooker
#4 lore raw
In reply to Murray J. Root
Quoted 11 lines · Murray J. Root

devfs=mount in lilo.conf

Insert CF card.
ls /dev shows sda and sda1
mount it.
ls /dev shows sda - no sda1
cd to mounted CF card
process hangs, sd-mod & usb-storage "busy"
rmmod -f usb-storage or sd-mod causes PC to stop (keyboard & mouse unresponsive, wmfire frozen, net disconnects)

Quoted 9 lines

reboot
Insert CF card.
ls /dev shows sda & sda1
mount it.
ls /dev shows sda - no sda1
umount it
ls /dev shows sda - no sda1
modprobe -r sd-mod && modprobe sd-mod
ls /dev shows sda & sda1

So if devfs is enabled, everything works just fine?

thanks,

greg k-h

author
#5 lore raw
Quoted 22 lines · Greg KH
Quoted 11 lines · Murray J. Root

devfs=mount in lilo.conf

Insert CF card.
ls /dev shows sda and sda1
mount it.
ls /dev shows sda - no sda1
cd to mounted CF card
process hangs, sd-mod & usb-storage "busy"
rmmod -f usb-storage or sd-mod causes PC to stop (keyboard & mouse unresponsive, wmfire frozen, net disconnects)

Quoted 9 lines

reboot
Insert CF card.
ls /dev shows sda & sda1
mount it.
ls /dev shows sda - no sda1
umount it
ls /dev shows sda - no sda1
modprobe -r sd-mod && modprobe sd-mod
ls /dev shows sda & sda1

Quoted 2 lines

So if devfs is enabled, everything works just fine?

How did you come to that conclusion?
sda1 is where the data is - when I mount the CF sda1 disappears from /dev and accessing the mountpoint hangs the process.

Signature · 8 lines
Murray J. Root
------------------------------------------------
DISCLAIMER: http://www.goldmark.org/jeff/stupid-disclaimers/
------------------------------------------------
Mandrake on irc.freenode.net:
  #mandrake & #mandrake-linux = help for newbies 
  #mdk-cooker = Mandrake Cooker
  #cooker = moderated Mandrake Cooker
#6 lore raw
In reply to Greg KH
Quoted 10 lines · Greg KH
Quoted 8 lines

Insert CF card.
ls /dev shows sda and sda1
mount it.
ls /dev shows sda - no sda1
cd to mounted CF card
process hangs, sd-mod & usb-storage "busy"
rmmod -f usb-storage or sd-mod causes PC to stop (keyboard & mouse unresponsive, wmfire frozen, net disconnects)

So if devfs is enabled, everything works just fine?

No. I have seen this kind of thing, and muttered a little bit on earlier occasions.
The problem is that USB storage invents a GUID, that usually is composed of vendor and product ID of the reader, possibly also a serial number, but does not involve the card. When the card goes away, the partitions stay, and the device is treated as "not present".
When a new card is inserted confusion arises.

We see that when a device goes from "not present" to "present" it may be necessary to throw out all data we have on it. Thus, maybe it was pointless to keep this data when it went away.

This is somewhat related to the IDs discussion of a few days ago. People invent IDs, but nobody knows of what precisely.

Andries

author
#7 lore raw

Re: USB CF reader reboots PC - DEVFS did it

In reply to Murray J. Root
Quoted 29 lines · Murray J. Root

ASUS P4S533 (SiS645DX chipset)
P4 2GHz
1G PC2700 RAM
SanDisk SDDR-77 ImageMate Dual Card Reader (using only CF cards)

----------------------------
devfs compiled in to kernel, devfs=nomount in lilo.conf

Insert CF card. mount it. cd to it, do reads and/or writes umount card. remove card.
insert a different card (does not happen if the same card is used) mount it. system reboots. logs are corrupted

Doesn't happen every time for read - sometimes I can read 2 or 3 cards first Happens every time for write - if I write to a card then changing cards causes a reboot

----------------------------
devfs=mount in lilo.conf

Insert CF card.
ls /dev shows sda and sda1
mount it.
ls /dev shows sda - no sda1
cd to mounted CF card
process hangs, sd-mod & usb-storage "busy"
rmmod -f usb-storage or sd-mod causes PC to stop (keyboard & mouse unresponsive, wmfire frozen, net disconnects)

Quoted 10 lines

reboot
Insert CF card.
ls /dev shows sda & sda1
mount it.
ls /dev shows sda - no sda1
umount it
ls /dev shows sda - no sda1
modprobe -r sd-mod && modprobe sd-mod
ls /dev shows sda & sda1

New - 2.5.55
No more reboot - just a seg fault when trying to mount a new card and process hangs if I try again (not surprising).

Removed devfs completely from build - everything works fine. Can mount, read, write, umount many cards without a problem.

Signature · 8 lines
Murray J. Root
------------------------------------------------
DISCLAIMER: http://www.goldmark.org/jeff/stupid-disclaimers/
------------------------------------------------
Mandrake on irc.freenode.net:
  #mandrake & #mandrake-linux = help for newbies 
  #mdk-cooker = Mandrake Cooker
  #cooker = moderated Mandrake Cooker