I Have an Intel 520 SSD. I can use smartmontools to ask how much bytes have been written to it:
sudo ./smartctl -q noserial -i -l devstat,0 -l devstat /dev/sda
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.2.0-32-generic] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Intel 520 Series SSDs
Device Model: INTEL SSDSC2CW240A3
Firmware Version: 400i
User Capacity: 240,057,409,536 bytes [240 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: Solid State Device
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2 T13/2015-D revision 3
SATA Version is: SATA 3.0, 3.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Sat Jun 21 08:42:06 2014 BST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Device Statistics (GP Log 0x04) supported pages
Page Description
0 List of supported log pages
1 General Statistics
4 General Errors Statistics
6 Transport Statistics
7 Solid State Device Statistics
Device Statistics (GP Log 0x04)
Page Offset Size Value Description
1 ===== = = == General Statistics (rev 2) ==
1 0x008 4 1129 Lifetime Power-On Resets
1 0x010 4 8660 Power-on Hours
1 0x018 6 5401949881 Logical Sectors Written
1 0x028 6 5794864033 Logical Sectors Read
4 ===== = = == General Errors Statistics (rev 1) ==
4 0x008 4 0 Number of Reported Uncorrectable Errors
4 0x010 4 9232 Resets Between Cmd Acceptance and Completion
6 ===== = = == Transport Statistics (rev 1) ==
6 0x008 4 9232 Number of Hardware Resets
6 0x010 4 4085 Number of ASR Events
6 0x018 4 0 Number of Interface CRC Errors
7 ===== = = == Solid State Device Statistics (rev 1) ==
7 0x008 1 255 Percentage Used Endurance Indicator
