Linux filesystem - can't umount?

djned12

New member
I'm on an Acer Aspire One, attempting to follow the guide here: http://forums.remote-exploit.org/showthread.php?t=14918 to install Backtrack 3 onto the AA1's SSD (yes, I know the guide was originally written for an EEE PC, but as far as I'm aware the same instructions will hold true for the AA1). I have Backtrack 3 on my USB stick and am able to boot into it fine. On that guide, I am currently on step 11, trying to format the /dev/hdc1 partition into an EXT3 filesystem, but when I try to unmount the partition using "umount /dev/hdc1", it says that it isn't mounted anyway. So I go ahead and try and make the filesystem with "mkfs.ext3 /dev/hdc1" but it refuses to make the filesystem as it says /dev/hdc1 is mounted! Clearly it can't be both mounted and unmounted, so what's going on here?

Another thing that may be relevant, prior to following this guide I deleted all partitions on the SSD, and then created a /dev/hdc1 partition as a primary partition with first cylinder 1 (the default) and last cylinder +8000M (I used this is the "last cylinder" as I thought that would make the partition almost fill the complete 8069MB of space available on the SSD). Have I made any grave mistakes here? Should I delete this partition, change its "type" using fdisk, etc?

I'm no slouch with Linux but partitioning is pretty new to me. I just hope someone can tell me how to properly make this EXT3 filesystem....
 

zakaluka

New member
Two tips:

(1) Does 'mount' say the partition is mounted or not?
(2) Use 'lsof' to see which open file handles exist for that partition. Something akin to 'lsof | grep <mount point> | less' would do it.

Once you know which files are open, you can try and figure out why it won't format it to ext3.
 
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