CentOS - Apr 2008 - mount: /dev/sdb1 already mounted or /blah busy

How do I go about troubeshooting this?  I'm using RHEL 4 update 6.

   mount: /dev/sdb1 already mounted or /blah busy

It's actually an iSCSI LUN (NetApp filer).  I successfully configured (ext3)
and mounted it, but when I rebooted, the /dev/sdb1 device/partition is seen by
the kernel and it shows up with "fdisk -l".

Nevertheless I get that error.  I've tried "umount" and am
informed that /blah isn't mounted.  I've tried "lsof" and
don't find a process that's attached to /blah.

I also tried "fsck -t ext3 /dev/sdb1" which worked (so it detects the
ext3 file system).

Any other tools to check out?
   === Al

On Wednesday 23 April 2008 02:39:41 Al Sparks wrote:
> How do I go about troubeshooting this?  I'm using RHEL 4 update 6.
>
>    mount: /dev/sdb1 already mounted or /blah busy
>
> It's actually an iSCSI LUN (NetApp filer).  I successfully configured
> (ext3) and mounted it, but when I rebooted, the /dev/sdb1 device/partition
> is seen by the kernel and it shows up with "fdisk -l".
>
> Nevertheless I get that error.  I've tried "umount" and am
informed that
> /blah isn't mounted.  I've tried "lsof" and don't
find a process that's
> attached to /blah.
Hi,
Maybe this:
1. Remove the entry from /etc/fstab, reboot.
2. Try to mount it manually. If it works, then something's wrong with the 
iscsi startup.

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On Tue, Apr 22, 2008 at 12:39:41PM -0700, Al Sparks
wrote:
> How do I go about troubeshooting this?  I'm using RHEL 4 update 6.
> 
>    mount: /dev/sdb1 already mounted or /blah busy
> 
> It's actually an iSCSI LUN (NetApp filer).  I successfully configured
(ext3) and mounted it, but when I rebooted, the /dev/sdb1 device/partition is
seen by the kernel and it shows up with "fdisk -l".
> 
> Nevertheless I get that error.  I've tried "umount" and am
informed that /blah isn't mounted.  I've tried "lsof" and
don't find a process that's attached to /blah.
> 
> I also tried "fsck -t ext3 /dev/sdb1" which worked (so it detects
the ext3 file system).
> 
> Any other tools to check out?
cat /proc/mounts
cat /proc/mounts | grep sdb1

You could possibly have /dev/sdb1 already mounted at some different mount point.
If that doesn't help, look for aliases for sdb1 in /dev

>    === Al
Regards,

Wojtek
>

Al Sparks wrote:
> How do I go about troubeshooting this?  I'm using RHEL 4 update 6.
> 
>    mount: /dev/sdb1 already mounted or /blah busy
> 
> It's actually an iSCSI LUN (NetApp filer).  I successfully configured
(ext3) and mounted it, but when I rebooted, the /dev/sdb1 device/partition is
seen by the kernel and it shows up with "fdisk -l".
> 
> Nevertheless I get that error.  I've tried "umount" and am
informed that /blah isn't mounted.  I've tried "lsof" and
don't find a process that's attached to /blah.
> 
> I also tried "fsck -t ext3 /dev/sdb1" which worked (so it detects
the ext3 file system).
> 
> Any other tools to check out?
Do you have an entry for /dev/sdb1 in /etc/mtab ? If so, try manually 
removing that line and try the mount again.

James Pearson