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Hi,
I have a problem using several pendrive's on one system. The first of
them was mounted as /dev/sdb1. After unmounting the next one could not
be mounted as /dev/sdb1 (message "sdb1 is not a valid block device") but
war recognized as /dev/sdc1. The next one as /dev/sdd1 etc. What's going
on? Why are all the pendrives not recognized as the same device i.e.
/dev/sdb1?
RedHat Enterprise, 2.4.21.
Thanks,
Piotr
On Tue, 08 May 2007 08:48:47 +0200, Piotr wrote:
[color=blue]
> Hi,
>
> I have a problem using several pendrive's on one system. The first of
> them was mounted as /dev/sdb1. After unmounting the next one could not
> be mounted as /dev/sdb1 (message "sdb1 is not a valid block device") but
> war recognized as /dev/sdc1. The next one as /dev/sdd1 etc. What's going
> on? Why are all the pendrives not recognized as the same device i.e.
> /dev/sdb1?[/color]
Well, they aren't the same device, are they? I'm not familiar with Red
Hat, but I'm guessing you need to have a look at udev.
[url]http://www.redhat.com/magazine/002dec04/features/udev/[/url]
thunder wrote:[color=blue]
> On Tue, 08 May 2007 08:48:47 +0200, Piotr wrote:
>[color=green]
>> Hi,
>>
>> I have a problem using several pendrive's on one system. The first of
>> them was mounted as /dev/sdb1. After unmounting the next one could not
>> be mounted as /dev/sdb1 (message "sdb1 is not a valid block device") but
>> war recognized as /dev/sdc1. The next one as /dev/sdd1 etc. What's going
>> on? Why are all the pendrives not recognized as the same device i.e.
>> /dev/sdb1?[/color]
>
> Well, they aren't the same device, are they? I'm not familiar with Red
> Hat, but I'm guessing you need to have a look at udev.
>
> [url]http://www.redhat.com/magazine/002dec04/features/udev/[/url][/color]
I do not use udev.
I discovered that after umounting a pendrive it is not removed from
/proc/partitions. Moreover after "ps -el" I get
1 S 0 3242 1 0 75 0 - 0 down_i ? 00:00:00
usb-storage-0
1 S 0 3243 1 0 81 0 - 0 down_i ? 00:00:00
scsi_eh_5
1 S 0 3967 1 0 75 0 - 0 down_i ? 00:00:00
usb-storage-1
1 S 0 3968 1 0 75 0 - 0 down_i ? 00:00:00
scsi_eh_6
This is the situation after mounting and unmounting 2 consecutive
pendrives. These 4 processes I am not able to kill even as a root.
What's going on? Why can't I kill a process being root?
Piotr