(4) Double Check the USB Hardrive location is /dev/sda

Now is a good time to double check that the target hardrive really is something like /dev/sda. If you have the luxury of more USB devices, it might be something else like /dev/sdc.

If you unplug, or plug in any other USB device, or reboot, this is subject to change . . . .

Which is why people go to the trouble of editing /etc/fstab and mounting devices by UUID and Label partitions. A quick check, if only for reassurance sake.


fdisk -l

Device         Boot   Start      End  Sectors  Size Id Type
/dev/mmcblk0p1         8192  2527343  2519152  1.2G  e W95 FAT16 (LBA)
/dev/mmcblk0p2      2527344 15523839 12996496  6.2G 85 Linux extended
/dev/mmcblk0p5      2531328  2596861    65534   32M 83 Linux
/dev/mmcblk0p6      2596864  2725887   129024   63M  c W95 FAT32 (LBA)
/dev/mmcblk0p7      2727936 15523839 12795904  6.1G 83 Linux

Disk /dev/sda: 931.5 GiB, 1000204885504 bytes, 1953525167 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0140057d


Device     Boot    Start        End    Sectors   Size Id Type
/dev/sda1           2048     526335     524288   256M 83 Linux
/dev/sda2         526336    8914943    8388608     4G 82 Linux swap / Solaris
/dev/sda3        8914944   42469375   33554432    16G 83 Linux
/dev/sda4       42469376 1953523711 1911054336 911.3G 83 Linux


Make sure you get this correct, if you have a different schema, take extra care when copy pasting any instructions.

Next : mkdir gentoo and mount the USB Hardrive

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