What is filesystem panic?

Rick Stevens ricks at nerd.com
Wed Oct 29 20:38:52 UTC 2008


Per Anton Rønning wrote:
> Mikkel L. Ellertson wrote:
>> Per Anton Rønning wrote:
>>  
>>> Mikkel L. Ellertson wrote:
>>>    
>>>> Double check that you are accessing the correct device. USB drives
>>>> do not always get "assigned" the same device. (It might get assigned
>>>> /dev/sdd instead of /dev/sdc for example.) If you are interested in
>>>> the reasons for this, it should probably be a separate thread...
>>>>
>>>> Mikkel
>>>>         
>>> Oh yes, my processor is slow now. a df command shows this:
>>> [root at localhost trade]# df
>>> Filesystem           1K-blocks      Used Available Use% Mounted on
>>> /dev/mapper/VolGroup00-LogVol00
>>>                     718841144   8123212 674202912   2% /
>>> /dev/sda1               194442     44177    140226  24% /boot
>>> tmpfs                  1943548        48   1943500   1% /dev/shm
>>> /dev/ram0                15863       728     15135   5% /mnt/rd
>>> /dev/sdf1              3985612     53992   3931620   2% /media/disk
>>>
>>> The JetFlash pen is assigned to sdf1. But do I have to assign it to sdc1
>>> for it to work??
>>> What consequences does this have?
>>>
>>> Brgds PAR
>>>
>>>     
>> Nope - but you have to use /dev/sdf instead of /dev/sdc if you want
>> fdisk to tell you anything about the drive. This is why you were
>> getting the unable to open /dev/sdc error message from fdisk.
>>
>> Mikkel
>>   
> Of course!
> And this is what now comes out of the woodwork:
> fdisk /dev/sdf1 -l
> Disk /dev/sdf1: 4089 MB, 4089428992 bytes
> 126 heads, 62 sectors/track, 1022 cylinders
> Units = cylinders of 7812 * 512 = 3999744 bytes
> Disk identifier: 0x69737369
> 
> This doesn't look like a partition table
> Probably you selected the wrong device.

/dev/sdf1 is a partition.  /dev/sdf is the device.  Try:

	# fdisk -l /dev/sdf

(that's "dash ell", by the way).  That should show you the partition
table on drive /dev/sdf.

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