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Old 03-06-2010, 06:55 PM   #1
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can I do mkfs after transferring data to HD

openSuse 11.2 KDE 4 desktop
User = newbie

I was having some trouble with a Hard drive that I store my photo's and other personal data on.
Fisrtly, it was messing my OS up, so that it would not boot to the desktop, but only to the command line where it would report that this drive was somehow corrupted and needed to be repaired.
Secondly, the OS was reporting that certain files were 380,000.2 TB in size. this drive is only 200 GB.
I didn't want to do the repair until I found a way to back up my data. I found another hard drive to do backup to but I had to take some data off of it. Which I did.

In the spirit of trying learn command line I decided to partition and format the hard drive using fdisk. I found some easy to use directions and proceeded to partition the drive. Unfortunately, I failed to realize the directions were only for the partitioning part [my fault for not reading further]. What I missed was that after using fdisk to partition, you must use mkfs to set filesystem type.[I thought I had done that in fdisk using the "l" , "t" commands within fdisk].

My questions are:
1] Can I do this mkfs command after I have put my data on the new hard drive or should I start fresh and redo partioning? [I have not deleted the other drive so my data is still there.]

2] What would be the cause of the incorrectly reported file sizes?

Thank You
Old 03-06-2010, 07:22 PM   #2
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Presuming you have your data safely tucked away somewhere else:
- the partition type in the partition table says what type (Linux) not what filesystem.
- after partitioning like that you have to mkfs to format a filesystem type (ext3, jfs, whatever - even NTFS). This will delete all data in this partition.
- logic errors in the metadata causes all sorts of weird errors - fsck is used to "fix" these; "man fsck" for info.
Old 03-06-2010, 11:27 PM   #3
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Thank You syg00
I thought I might have to start over, but was still hoping I didn't have to. Oh well, quicker I am on it, quicker it will be done.


data, fdisk, hdd, mkfs, partition

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