OT: fdisk

[Polytropon]

On Mon, 4 Oct 2010 07:52:21 -0700, Robert <traveling08 at cox.net> wrote:
> On Mon, 4 Oct 2010 16:32:25 +0200
> Polytropon <freebsd at edvax.de> wrote:
> [root at asus64] ~# fdisk /dev/md10
> ******* Working on device /dev/md10 *******
> parameters extracted from in-core disklabel are:
> cylinders=7648 heads=255 sectors/track=63 (16065 blks/cyl)
> 
> Figures below won't work with BIOS for partitions not in cyl 1
> parameters to be used for BIOS calculations are:
> cylinders=7648 heads=255 sectors/track=63 (16065 blks/cyl)
> 
> Media sector size is 512
> Warning: BIOS sector numbering starts with sector 1
> Information from DOS bootblock is:
> The data for partition 1 is:
> sysid 7 (0x07),(NTFS, OS/2 HPFS, QNX-2 (16 bit) or Advanced UNIX)
>     start 63, size 976773105 (476939 Meg), flag 0
> 	beg: cyl 0/ head 1/ sector 1;
> 	end: cyl 1023/ head 15/ sector 63
> The data for partition 2 is:
> <UNUSED>
> The data for partition 3 is:
> <UNUSED>
> The data for partition 4 is:
> <UNUSED>

Okay, as I see it, this looks valid - a working partition table.
What can prevent mounting now is a defect in the NTFS MFT, everything
"after" the disk's partition table.



> > > [root at asus64] ~# ls -l /dev/md*
> > > crw-r-----  1 root  operator    0, 129 Oct  4 06:43 /dev/md10
> > > crw-r-----  1 root  operator    0, 130 Oct  4 06:43 /dev/md10s1
> > > crw-------  1 root  wheel       0,  66 Oct  1 14:43 /dev/mdctl
> > > [root at asus64] ~# mount -o ro /dev/md10s1 /mnt
> > 
> > Good. At least a bit.
> 
> Is this the way to mount it, not _ntfs?

My fault: Using mount_ntfs is the correct way (or mount -t ntfs);
mount without options for a device / directory NOT listed in fstab
defaults to UFS.



> No. I was trying to just get the data to a 250GB drive. Now I am doing
> the 500GB to a 1TB drive and will follow up when complete.

Very good. You can check the progress by issuing ^T - dd will then
show a status message. If you're using ddrescue (no big difference
here), you'll get some more info, like this:

% ddrescue -d -r 3 -n /dev/ad1s1f ad1s1f.ddr log.txt
Press Ctrl-C to interrupt
Initial status (read from logfile)
rescued:         0 B,  errsize:       0 B,  errors:       0
Current status
rescued:    90772 MB,  errsize:       0 B,  current rate:    6815 kB/s
   ipos:    90772 MB,   errors:       0,    average rate:    6723 kB/s
   opos:    90772 MB
Finished

This example is 3h 45min for 80 GB from one (P)ATA disk to another.
You can watch the progress continuously here.


-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...