PRELIMINARY/CONFIDENTIAL
24
MACH2 2.5-Inch Serial ATA Solid State Drive
S.M.A.R.T. Attributes
Table 13 lists the S.M.A.R.T. attributes that are supported.
Table 13.
Supported S.M.A.R.T. Attributes
Identify Device Information
The Identify Device command enables the host to receive parameter information from the SSD.
When the Identify Device command executes, the SSD sets the BSY bit, prepares to transfer the 256
words of SSD identification data to the host, sets the DRQ bit, clears the BSY bit, and then generates
an interrupt. The host can then transfer the data by reading the data register. Reserved bits or words
are all zero. Table 14 contains typical Identify Device Information for the SSD.
ID
Name
Description
1
Raw Read Error
Frequency of errors while reading raw data from a disk.
9
Power-On Hours
Number of hours elapsed in the Power-On state.
12
Power Cycle
Number of Power-On events.
187
Reported Uncorrectable Errors The number of uncorrectable errors reported at the interface.
194
Temperature
Temperature of base casting. (Requires integrated
temperature sensor.)
195
ECC On-the-Fly
Number of ECC on-the-fly errors.
196
Offline Reallocation Event
Total number of sectors remapped.
197
Pending Defects
Number of sectors currently suspected in need of remapping.
198
Offline Surface Scan
Number of uncorrected errors that occurred during offline
scan.
199
UDMA CRC Error (PATA Only) Number of CRC errors during UDMA mode.
Identify Device Information Key
F
Content of the word is Fixed and does not change. For removable media devices, these values
may change when the media is removed or changed.
V
Content of the word is Variable and may change depending on the state of the device or the
commands executed by the device.
X
Content of the word is Vendor-Specific and may fixed or variable.
R
Content of the word is reserved and shall be 0 (zero).
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