Bsrgvty

What does this error mean, and how can I solve it?

Error mounting /dev/sda4 at /media/pzj/B8082EA0082E5D9E: Command-line
mount -t "ntfs" -o
"uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177"
"/dev/sda4" "/media/pzj/B8082EA0082E5D9E"' exited with non-zero exit
status 18: Failed to write lock '/dev/sda4': Resource temporarily
unavailable Error opening '/dev/sda4': Resource temporarily
unavailable Failed to mount '/dev/sda4': Resource temporarily
unavailable (udisks-error-quark, 0)

Here is a snap of the Disk via disks.

Edit:

Output of sudo fdisk -l

pzj@cloudz:~$ sudo fdisk -l
[sudo] password for pzj:

Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical):
512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096
bytes Disklabel type: gpt Disk identifier:
01F58508-AB5F-4912-9A0A-2CB7F87AD409

`Device Start End Sectors Size Type`
`/dev/sda1 2048 616447 614400 300M Windows recovery environment` 
`/dev/sda2 616448 821247 204800 100M EFI System`
`/dev/sda3 821248 1083391 262144 128M Microsoft reserved`
`/dev/sda4 1083392 1953523711 1952440320 931G Microsoft basic data

Output of mount

pzj@cloudz:~$ mount
/dev/sdb5 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,nodev,noexec,nosuid)
sysfs on /sys type sysfs (rw,nodev,noexec,nosuid)
none on /sys/fs/cgroup type tmpfs (rw,uid=0,gid=0,mode=0755,size=1024)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /sys/firmware/efi/efivars type efivarfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,nodev,noexec,nosuid,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,nodev,noexec,nosuid,size=104857600,mode=0755)
none on /sys/fs/pstore type pstore (rw)
/dev/sdb1 on /boot/efi type vfat (rw)
/dev/sdb4 on /var type ext4 (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nodev,noexec,nosuid)
systemd on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,noexec,nodev,none,name=systemd)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=pzj)
/dev/sda1 on /media/pzj/Recovery type fuseblk (rw,nosuid,nodev,allow_other,default_permissions,blksize=4096)
pzj@cloudz:~$ 

The what is evident by the error, as to why the drive is unavailable , based on the disk utility output the drive appears to be failing. You also appear to be dual booting Windows. If fast-start is enabled under Windows (the default) the file system is unavailable due to the hibernation file Windows leaves there. This is actually for your protection. If you were to make changes to the file system with Ubuntu while Windows is in hibernation status (fast-boot), you would lose those changes upon rebooting (resuming) Windows.

The first thing to try is disabling fast-boot from windows. This should allow you to mount the drive with Ubuntu.

I recommend replacement of the drive ASAP and insuring that you have current backups of all your critical data.

Source: Experience