fdisk fix mis-aligned SSD to correct head and sector count

    maletor@denmark:~$ sudo fdisk /dev/sdc

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): p

Disk /dev/sdc: 64.0 GB, 64023257088 bytes
255 heads, 63 sectors/track, 7783 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000cf7d0

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1   *           1        7461    59924480   83  Linux
/dev/sdc2            7461        7784     2595841    5  Extended
/dev/sdc5            7461        7784     2595840   82  Linux swap / Solaris

I would like to correct this to 32 heads and 32 sectors for a 512kb erase block per this article. http://wiki.archlinux.org/index.php/Solid_State_Drives If I unmount /dev/sdc and run fdisk -H 32 -S 32 and write the changes will the data be gone? If so how can I backup my data and put everything back on? I assume I will have to reinstall grub as well.

ansaurus

tags:

views:

answers:

fdisk fix mis-aligned SSD to correct head and sector count

related questions