Move from /dev/sdb1 to /dev/sdb

You want to install grub2 to MBR? This can be done by using the "install to MBR" dialog. Just put /dev/sdb into the device field.

"Change environment" is another functionality. It is useful if you're using a live cd but want to modify the grub of your installed operating system (to reinstall the bootloader or restoring hidden entries).

I try:
source_dir doesn't exist. Please specify --target or --directory
I think is not a Grub Customizer problem.

Which distribution are you using?

Basically, the "install to MBR" option just runs grub-install [YOUR_DEVICE]. So you can also use `sudo grub-install /dev/sda` on command line. You should get the same result.

Kubuntu 12.10

I had try "sudo grub-install /dev/sdb"
source_dir doesn't exist. Please specify --target or --directory

So I try to use Grub Customizer.

This is my sudo fdisk -l, is possible that I cant install because sdb is GPT?

Disk /dev/sda: 64.0 GB, 64023257088 bytes
255 testine, 63 settori/tracce, 7783 cilindri, totale 125045424 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x00067947

Dispositivo Boot Start End Blocks Id System
/dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT
/dev/sda2 206848 125040639 62416896 7 HPFS/NTFS/exFAT

WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/sdb: 64.0 GB, 64022175232 bytes
255 testine, 63 settori/tracce, 7783 cilindri, totale 125043311 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x09e863d0

Dispositivo Boot Start End Blocks Id System
/dev/sdb1 1 125043310 62521655 ee GPT

WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted.

Disk /dev/sdc: 3998.6 GB, 3998614552576 bytes
255 testine, 63 settori/tracce, 486137 cilindri, totale 7809794048 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x09e7e3cf

Dispositivo Boot Start End Blocks Id System
/dev/sdc1 1 4294967295 2147483647+ ee GPT

Disk /dev/sdi: 2000.4 GB, 2000398934016 bytes
255 testine, 63 settori/tracce, 243201 cilindri, totale 3907029168 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x698b2317

Dispositivo Boot Start End Blocks Id System
/dev/sdi1 63 3907024064 1953512001 83 Linux

Disk /dev/mapper/sdc3_crypt: 25.0 GB, 24998051840 bytes
255 testine, 63 settori/tracce, 3039 cilindri, totale 48824320 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x00000000

Il disco /dev/mapper/sdc3_crypt non contiene una tabella delle partizioni valida

Disk /dev/mapper/sdc2_crypt: 16.0 GB, 15997075456 bytes
255 testine, 63 settori/tracce, 1944 cilindri, totale 31244288 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x00000000

Il disco /dev/mapper/sdc2_crypt non contiene una tabella delle partizioni valida

Disk /dev/mapper/sdc4_crypt: 3757.6 GB, 3757611941888 bytes
255 testine, 63 settori/tracce, 456836 cilindri, totale 7339085824 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x00000000