Dell PowerEdge SDS 100 Intel 320 Series SSD User's Information for Dell PowerE - Page 13

- Note that the attribute ID# are listed in decimal and not in Hex with the Attribute_NAME associated with Hard Drives. Figure 8. Reading the SMART drive wear attributes The table below translates the data from smartctl to the Intel-supported SMART Attributes. Table 1. Converting SMART attribute values Attribute Decimal ID Hex ID Raw Value Host Writes Count 225 E1h 477242 Timed Workload Media 226 E2h 635 Wear Indicator Timed Workload Host Read/ 227 E3h 0 Write Ratio Workload Timer 228 E4h 1367 Calculating Estimated Drive Wear From the data collected using smartctl, and the translated values, you can then calculate the drive wear rate based on the given workload. Using this example: • Timed Workload Media Wear (E2h) has a raw value of 635. Therefore, the percentage wear rate = 635/1024 = 0.620% • Timed Workload Host Read/Write Ratio (E3h) has a normalized value of 0, indicating that 0% of the operations were reads. This corresponds with the 100% random write workload set in Iometer. • Workload Timer (E4h) has a raw value of 1367. Therefore the workload ran for 1367 minutes or 22.783 hours. Given these values, the media wear percentage rate for this workload can then be calculated: 13