Replace ? with your the letter that will be assigned when you plug in and power up the drive, dmesg -T will tell you what letter has been assigned, df which show you what letters are already in use.
1) gdisk -l /dev/sd? (got the right drive??)
2) gdisk /dev/sd?
3) d = delete existing partion
4) n = create new, 8300 for Linux
5) w = write/exit
6) power off, or reread??
7) gdisk -l /dev/sd? ; umount /run/media/charles/EFI
8) mkfs -V -t ext4 /dev/sd?1 = newfs
9) tune2fs -L seagate5 /dev/sd?1
10) tune2fs -m 0 /dev/sd?1
11) vi /etc/fstab, LABEL=seagate5 /seagate5 ext4 defaults 0 0
12) mkdir /seagate5; mount /seagate5 ; df
NOTES and example output:
If you are getting Ring error in your dmesg -T output, bad cable usually what causes that. I've had new USB cables go bad right out of the package, have a few different brands on hand!
narnia<129># gdisk /dev/sdd
GPT fdisk (gdisk) version 1.0.9
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Command (? for help): d
Partition number (1-2): 2
or {+-}size{KMGTP}:
Partition number (2-128, default 2):
First sector (34-42970644445, default = 409640) or {+-}size{KMGTP}:
Last sector (409640-42970644445, default = 42970644439) or {+-}size{KMGTP}:
Current type is 8300 (Linux filesystem)
Hex code or GUID (L to show codes, Enter = 8300):
Changed type of partition to 'Linux filesystem'
Command (? for help): w
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!
Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to /dev/sdd.
The operation has completed succes
gdisk -l /dev/sdd
Number Start (sector) End (sector) Size Code Name
1 40 409639 200.0 MiB EF00 EFI System Partition
2 409640 42970644439 20.0 TiB 8300 Linux filesystem
