Re: [Linux-NTFS-Dev] NTFS Drive Can't Be Read/Mounted in 2.6 Kernel

[Anton A. <ai...@ca...>]

Hi,

On 4 Apr 2007, at 16:10, Fresh Fish wrote:
> It worked! I can now enjoy the new 2.6 kernel! Thanks so much!

You are welcome.  (-:

> BTW if you don't mind, how did you know that my hdb disk uses  
> OnTrackDisk Manager? Also how did you find the solution?
> I just want to learn how I'm not experienced at Linux and I'm  
> trying to learn.

 From your dmesg output.  Here are the relevant line:

hdb: hdb1[DM]

I searched linux-2.6/fs/partitions/* for the string "DM" and I found  
it in those lines:



                 if (SYS_IND(p) == DM6_PARTITION)
                         printk("[DM]");

in the file msdos.c.

I then looked up DM6_PARTITION in include/linux/* and found it in  
those lines:

         DM6_PARTITION = 0x54,           /* has DDO: use xlated geom  
& offset */

in the file genhd.h.

I then used Google to search for "DDO DM6" and the very first hit was  
this one:

http://kerneltrap.org/node/3417

Which explained it all...

Also I found the large disk HOWTO which also explained it:

http://tldp.org/HOWTO/Large-Disk-HOWTO-8.html#ss8.7

Finally in the kernel sources, in Documentation/ide.txt you also find  
the string "DM" when describing the remap63 option:

"hdx=remap63"          : remap the drive: add 63 to all sector numbers
                           (for DM OnTrack)

So lots of places to find the info if you know what you are looking  
for.  (-:

Best regards,

	Anton
-- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer, http://www.linux-ntfs.org/