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Top Forums Shell Programming and Scripting Automating partitioning setup of /dev/sda on /dev/sdc Post 302944762 by Corona688 on Thursday 21st of May 2015 03:24:52 PM
Old 05-21-2015
That's incorrect, cylinders and sectors haven't mattered since 1996. The computer just asks for block 6, block 123485701, or whatever, and the hard drive handles all the rest.

What do you mean by "first 2048 sectors"? Do you mean blocks?

I see a couple of pitfalls here. First of all, did you reload the partition table after running dd? Linux needs to be told "the partition table has changed" when you do that, or it will just keep using the old layout until the next reboot. There's also a "backup" GPT sector which might have to be regenerated after you do the copy.
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FDISK(8)						      System Manager's Manual							  FDISK(8)

NAME
fdisk - partition a hard disk [IBM] SYNOPSIS
fdisk [-hm] [-sn] [file] OPTIONS
-h Number of disk heads is m -s Number of sectors per track is n EXAMPLES
fdisk /dev/hd0 # Examine disk partitions fdisk -h9 /dev/hd0 # Examine disk with 9 heads DESCRIPTION
When fdisk starts up, it reads in the partition table and displays it. It then presents a menu to allow the user to modify partitions, store the partition table on a file, or load it from a file. Partitions can be marked as MINIX, DOS or other, as well as active or not. Using fdisk is self-explanatory. However, be aware that repartitioning a disk will cause information on it to be lost. Rebooting the sys- tem immediately is mandatory after changing partition sizes and parameters. MINIX, XENIX, PC-IX, and MS-DOS all have different partition numbering schemes. Thus when using multiple systems on the same disk, be careful. Note that MINIX, unlike MS-DOS , cannot access the last sector in a partition with an odd number of sectors. The reason that odd partition sizes do not cause a problem with MS-DOS is that MS-DOS allocates disk space in units of 512-byte sectors, whereas MINIX uses 1K blocks. Fdisk has a variety of other features that can be seen by typing h. Fdisk normally knows the geometry of the device by asking the driver. You can use the -h and -s options to override the numbers found. SEE ALSO
part(8). FDISK(8)
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