Reformatting a flash drive using terminal

So I have a flash drive that I need to reformat because whenever I plug it in, I get this message:

And I think, "Oh, okay, I'll just head on over to Disk Utility and reformat it. No biggie." Except I nice error that doesn't let me do what I want to.

Next stop, terminal. I've tried as many things as the internet can give me, but to no avail. Here's what I've tried in terminal so far:

Last login: Mon Mar 10 09:20:59 on ttys000

Seans-MacBook-Pro:~ Sean$ diskutil verifyVolume /dev/disk1s1

Started file system verification on disk1s1 PHONE DRIVE

Checking file system

** /dev/disk1s1

** Phase 1 - Preparing FAT

** Phase 2 - Checking Directories

Unable to read directory (Input/output error)

Error: -69845: File system verify or repair failed

Underlying error: 8: POSIX reports: Exec format error

Seans-MacBook-Pro:~ Sean$ diskutil zeroDisk /dev/disk1s1

Error with zero disk erase: Couldn't open disk (-69879)

Seans-MacBook-Pro:~ Sean$ sudo diskutil zeroDisk /dev/disk1s1

Error with zero disk erase: Couldn't open disk (-69879)

Seans-MacBook-Pro:~ Sean$ umount /dev/disk1s1

umount: unmount(/Volumes/PHONE DRIVE): Operation not permitted

Seans-MacBook-Pro:~ Sean$ sudo umount /dev/disk1s1

Seans-MacBook-Pro:~ Sean$ sudo diskutil zeroDisk /dev/disk1s1

Error with zero disk erase: Couldn't open disk (-69879)

Seans-MacBook-Pro:~ Sean$ sudo diskutil reformat /dev/disk1s1

Started erase on disk1s1 PHONE DRIVE

Unmounting disk

Erasing

newfs_msdos: /dev/rdisk1s1: Permission denied

Mounting disk

Error: -69832: File system formatter failed

Seans-MacBook-Pro:~ Sean$ sudo diskutil zeroDisk /dev/disk1

Error with zero disk erase: Couldn't open disk (-69879)

Seans-MacBook-Pro:~ Sean$ diskutil unmountDisk force /Volumes/PHONE DRIVE

Unmount failed for force

Seans-MacBook-Pro:~ Sean$ diskutil zeroDisk force /dev/disk1

Proceed? (y/N) y

Error with zero disk erase: Couldn't open disk (-69879)

Seans-MacBook-Pro:~ Sean$ df

Filesystem 512-blocks Used Available Capacity iused ifree %iused Mounted on

/dev/disk0s2 1459931312 1148156536 311262776 79% 143583565 38907847 79% /

devfs 372 372 0 100% 644 0 100% /dev

localhost:/IAebrDIVbkOPIvtdHV8Xmg 1459931312 1459931312 0 100% 0 0 100% /Volumes/MobileBackups

map -hosts 0 0 0 100% 0 0 100% /net

map auto_home 0 0 0 100% 0 0 100% /home

/dev/disk0s4 491913208 458908112 33005096 94% 396569 16503291 2% /Volumes/BOOTCAMP

/dev/disk1s1 15531784 1672856 13858928 11% 0 0 100% /Volumes/PHONE DRIVE

Seans-MacBook-Pro:~ Sean$ diskutil unmountDisk force /Volumes/PHONE DRIVE

Unmount failed for force

Seans-MacBook-Pro:~ Sean$ diskutil unmountDisk /Volumes/PHONE DRIVE

Usage: diskutil u[n]mountDisk [force] MountPoint|DiskIdentifier|DeviceNode

unmountDisk will operate on all partitions of that disk, and

will do so whether a whole disk or a partition was specified.

Seans-MacBook-Pro:~ Sean$ diskutil unmountDisk /Volumes/PHONE DRIVE

Usage: diskutil u[n]mountDisk [force] MountPoint|DiskIdentifier|DeviceNode

unmountDisk will operate on all partitions of that disk, and

will do so whether a whole disk or a partition was specified.

Seans-MacBook-Pro:~ Sean$ diskutil force /Volumes/PHONE DRIVE

diskutil: did not recognize verb "force"; type "diskutil" for a list

Seans-MacBook-Pro:~ Sean$ diskutil unmountDisk force /Volumes/PHONE DRIVE

Unmount failed for force

Seans-MacBook-Pro:~ Sean$ diskutil umount /Volumes/PHONE DRIVE

Usage: diskutil u[n]mount [force] MountPoint|DiskIdentifier|DeviceNode

If anyone can shed some light on how to successfully erase/reformat a thumb drive that just won't place nice that would be awesome.