This tread is to get a better understanding of the S.M.A.R.T attributes of SSD’s. It is not a thread about how long before my ssd craps out, or why I’m not bothered when my ssd craps out.

First off it doesn’t seem that there is an SSD standard for S.M.A.R.T attributes. Some of the ID’s seem new and others have been borrowed from HDD ID attributes that are of no relevance to ssd’s (like spin up time.)

Some of the ID’s below maybe incorrect and some of the S.M.A.R.T tools don’t always report the ID’s correctly.

There are loads of tools out there that can report S.M.A.R.T

I like Hard Disk Sentinel as it has a number of other handy features like disk performance monitoring.

Indilinx SSD’s

ID Hex Attribute
----------------------
01 (01) Read error rate
09 (09) Power on Hours
0C (12) Device power cycle count
C7 (199) Write Sectors Total Count
CD (205) Max PE Count Spec
CE (206) Min Erase Count
CF (207) Max Erase Count
D0 (208) Erase count average
D1 (209) Remaining drive life in % by Erase count

There is a really useful post that explains the above.
To find out total writes: ID# 199 x 512
To find out the % of write cycles used: ID# 208 x 100/ID# 205 = % of write cycles used.
To estimate remaining hours of use: ID# 9 (100/7.26) – 1 (x ID# 9)
To convert the above to years: / 8760

Intel SSD’s

ID Hex Attribute
----------------------
05 Re-allocated sector count
09 (09) Power on Hours
0C (12) Device power cycle count
CO Unsafe shutdown count
E1 (225) Host writes
E8 (232) Available Reserved Space
E9 (233) Media wear out indictor
B8 End to end error detection count

Info on Intel S.M.A.R.T attributes can be found here. For G2's (with the latest f/w) S.M.A.R.T data can be obtained from the Intel Drive Toolbox.

As far as I know all ID’s are the same between a G1 and a G2 apart from B8, which is G2 only.

Key ID’s
E1 – HostWrites
This attribute reports the total number of sectors written by the host system. The raw value is increased by 1 for every 65,536 sectors written by the host.
E8 - Available Reserved Space
This attribute reports the number of reserve blocks remaining. The attribute value begins at 100 (64h), which indicates that the reserved space is 100 percent available. The threshold value for this attribute is 10 percent availability, which indicates that the drive is close to its end of life. Use the Normalized value for this attribute.
E9 Media Wearout Indicator
This attribute reports the number of cycles the NAND media has experienced.
The normalized value declines linearly from 100 to 1 as the average erase cycle count increases from 0 to the maximum rated cycles.
Once the normalized value reaches 1, the number will not decrease, although it is likely that significant additional wear can be put on the device. Use the Normalized value for this attribute.