SanDisk SSD U100 128GB - SMART data and lifetime

Hello,

I would like to know if the SMART value of ‘0’ for “Available_Reservd_Space”, as shown by smartctl (under Linux), is an indication for my “SanDisk SSD U100 128GB” reaching end of “life” ?

I would also be grattefull is someone could point me to some method/documentation on how to interpret the “raw” data for this particular model, and particularily those allowing an estimation of remaining lifetime.

(Below is the full output of smartctl for my SSD drive)

Thanks in advance and regards,
Tsintao

smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.11-1-amd64] (local build)
Copyright © 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     SanDisk SSD U100 128GB
Serial Number:    XXXXXXXXXXXX
LU WWN Device Id: 5 001b44 73f91f0a7
Firmware Version: 10.02.00
User Capacity:    128’035’676’160 bytes [128 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2 T13/2015-D revision 3
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sun Nov  3 17:26:34 2013 CET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x00)    Offline data collection activity
                    was never started.
                    Auto Offline Data Collection: Disabled.
Self-test execution status:      (   0)    The previous self-test routine completed
                    without error or no self-test has ever
                    been run.
Total time to complete Offline
data collection:         (  120) seconds.
Offline data collection
capabilities:              (0x11) SMART execute Offline immediate.
                    No Auto Offline data collection support.
                    Suspend Offline collection upon new
                    command.
                    No Offline surface scan supported.
                    Self-test supported.
                    No Conveyance Self-test supported.
                    No Selective Self-test supported.
SMART capabilities:            (0x0003)    Saves SMART data before entering
                    power-saving mode.
                    Supports SMART auto save timer.
Error logging capability:        (0x01)    Error logging supported.
                    General Purpose Logging supported.
Short self-test routine
recommended polling time:      (   2) minutes.
Extended self-test routine
recommended polling time:      (  32) minutes.

SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  5 Reallocated_Sector_Ct   0x0002   100   100   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0002   100   100   000    Old_age   Always       -       2962
 12 Power_Cycle_Count       0x0002   100   100   000    Old_age   Always       -       926
171 Unknown_Attribute       0x0002   100   100   000    Old_age   Always       -       0
172 Unknown_Attribute       0x0002   100   100   000    Old_age   Always       -       0
173 Unknown_Attribute       0x0002   100   100   000    Old_age   Always       -       30
174 Unknown_Attribute       0x0002   100   100   000    Old_age   Always       -       884
187 Reported_Uncorrect      0x0002   100   100   000    Old_age   Always       -       0
230 Unknown_SSD_Attribute   0x0002   100   100   000    Old_age   Always       -       100
232 Available_Reservd_Space 0x0003   100   100   005    Pre-fail  Always       -       0
234 Unknown_Attribute       0x0002   100   100   000    Old_age   Always       -       184
241 Total_LBAs_Written      0x0002   100   100   000    Old_age   Always       -       4078956678
242 Total_LBAs_Read         0x0002   100   100   000    Old_age   Always       -       6336472316

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged.  [To run self-tests, use: smartctl -t]

Selective Self-tests/Logging not supported

I found the claimed endurance* for this model to be 80 TBW.
* http://www.sandisk.com/products/ssd/sata/u100/#Specifications

So (correct me if I am wrong), with
“Sector Size: 512”
“Total_LBAs_Written: 4078956678”
That would mean I have only used about 2.3% of the 80 TBW.
(4078956678 * 512) / (1024 ^ 4) ~= 1.9TB
and (1.9/80)*100 ~=2.3%

If anyone could confirm that is a proper way of estimating the
remaining lifetime of this SSD, I would be gratefull.

Thanks and regards.