Cactus Technologies, Limited
Cactus Technologies Limited
-900 Series Industrial Grade SATA SSD Product Manual
v1.0
38
326-327
1
Number of sectors for SMART Log at address 0xA3
328-511
0
Reserved
The NCQ Command Error Log returns information about the most recent NCQ command failure. The
Host Vendor Specific Logs can be used by the host to store and retrieve arbitrary data. The SMART
Wear Level Data and SMART Remap Data logs return the same data that is also returned by the SMART
A2 Read Wear Level Data and SMART A2 Read Remap Data commands.
6.9. S.M.A.R.T. Write Log
This command writes data of the SMART log. When issuing this command, set the Sector Count register
to the number of sectors to write and set the Sector Number register to the Log address. Only the Host
Vendor Specific logs can be written, all other logs are read only.
6.10. S.M.A.R.T. Read Remap Data
This command returns spare block information. When issuing this command, set the Sector Count
register to 1. The information returned is the number of initial spare blocks per flash chip and the current
number of spare blocks per flash chip. The format is as follows:
Bytes
Description
0-31
Initial number of spare blocks for flash chip 0 to 15 (2 bytes per chip)
32-63
Current number of spare blocks for flash chip 0 to 15 (2 bytes per chip)
64-511
Reserved
6.11. S.M.A.R.T. Read Wear Level Data
This command returns 4 sectors of wear level information. When issuing this command, set the Sector
Count register to 4. The information returned is the distribution of blocks in each of 1024 wear level
classes. For each class, the entry contains the number of blocks in that class. The format of the returned
data is as follows, where n denotes the sector number from 0 to 3:
Bytes
Description
0-1
Number of blocks in wear level class 256*n + 0
2-3
Number of blocks in wear level class 256*n + 1
