Erro ao usar o sudo apt-get update

Question

Estou usando o combo SSD / HDD do kubuntu 16.04 e continuo recebendo a mensagem de erro abaixo ao tentar sudo apt-get update .

Reading package lists... Error!   
E: Could not create temporary file for /var/cache/apt/srcpkgcache.bin - mkstemp (5: Input/output error)   
E: The package lists or status file could not be parsed or opened.

Eu tentei

sudo rm /var/lib/apt/lists/* -vf
sudo apt-get update 

e ainda obter os mesmos resultados.

Alguma idéia?

**df -h**
Filesystem      Size  Used Avail Use% Mounted on
udev            3.9G     0  3.9G   0% /dev
tmpfs           785M  9.3M  775M   2% /run
/dev/sda5        19G  674M   18G   4% /
/dev/sda6       8.2G  3.5G  4.3G  45% /usr
tmpfs           3.9G  232K  3.9G   1% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/sda1       468M  102M  338M  24% /boot
/dev/sdb6       680G  4.7G  640G   1% /home
/dev/sdb1       3.8G  825M  2.8G  23% /var
tmpfs           785M     0  785M   0% /run/user/118
tmpfs           785M   12K  785M   1% /run/user/1000


**grep "\sro[\s,]" /proc/mounts**

tmpfs /sys/fs/cgroup tmpfs ro,nosuid,nodev,noexec,mode=755 0 0

**mount -v | grep "^/" | awk '{print "\nPartition identifier: "   "\n    Mountpoint: "  }'**

Partition identifier: /dev/sda5
Mountpoint: /

Partition identifier: /dev/sda6
Mountpoint: /usr

Partition identifier: /dev/sda1
Mountpoint: /boot

Partition identifier: /dev/sdb6
Mountpoint: /home

Partition identifier: /dev/sdb1
Mountpoint: /var

**fdisk -l**

Disk /dev/sda: 28 GiB, 30016659456 bytes, 58626288 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: 0x000e0f3d

Device     Boot    Start      End  Sectors  Size Id Type
/dev/sda1  *        2048  1007615  1005568  491M 83 Linux
/dev/sda2        1009662 58626047 57616386 27.5G  5 Extended
/dev/sda5        1009664 41046015 40036352 19.1G 83 Linux
/dev/sda6       41048064 58626047 17577984  8.4G 83 Linux


Disk /dev/sdb: 698.7 GiB, 750156374016 bytes, 1465149168 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: dos
Disk identifier: 0x000eff33

Device     Boot    Start        End    Sectors   Size Id Type
/dev/sdb1           2048    8118271    8116224   3.9G 83 Linux
/dev/sdb2        8120318 1465147391 1457027074 694.8G  5 Extended
/dev/sdb5        8120320   17881087    9760768   4.7G 82 Linux swap / Solaris
/dev/sdb6       17883136 1465147391 1447264256 690.1G 83 Linux

Partition 2 does not start on physical sector boundary.