MTFDHAL800MCE-1AN1ZABYY Datasheet MTFDHAL1T2MCF-1AN1ZABYY, MTFDHAL1T6MCE-1AN1ZABYY, MTFDHAL2T4MCF-1AN1ZABYY | P13-P15

Table 11: SMART/Health Information (Log Identifier 02h)

Bytes Name Description

0 Critical warning Indicates critical warnings for the state of the controller. Each bit corre-

sponds to a critical warning type; multiple bits may be set. If a bit is

cleared to 0, the critical warning does not apply. Critical warnings may

result in an asynchronous event notification to the host.

• Bit 00: If set to 1, the available spare space has fallen below the

threshold.

• Bit 01: If set to 1, the temperature has exceeded a critical threshold.

• Bit 02: If set to 1, the device reliability has been degraded due to sig-

nificant media-related errors or any internal error that degrades de-

vice reliability.

• Bit 03: If set to 1, the media has been placed in read-only mode.

• Bit 04: If set to 1, the volatile memory backup device has failed. This

field is only valid if the controller has a volatile memory backup solu-

tion.

• Bits 07:05: Reserved.

2:1 Temperature Contains the temperature of the overall device (controller and NVM in-

cluded) in units of Kelvin. If it exceeds the temperature threshold, an

asynchronous event may be issued to the host. For the 9100, the value

reported is the maximum temperature measured on either the board

or controller.

3 Available spare Contains a normalized percentage (0–100%) of the remaining available

spare capacity, beginning at 100% and decreasing.

4 Available spare threshold When the available spare falls below the threshold indicated in this

field, an asynchronous event may be issued to the host. The value is in-

dicated as a normalized percentage (0–100%). Threshold is set to 5%.

5 Percentage used Contains a vendor-specific estimate of the percentage of the device life

used based on the actual device usage and the manufacturer's predic-

tion of device life.

A value of 100 indicates that the estimated endurance of the device

has been consumed, but may not indicate a device failure.

Refer to the JEDEC JESD218 standard for SSD device life and endurance

measurement techniques.

31:6 Reserved Reserved.

47:32 Data units read Contains the number of 512-byte data units the host has read from the

controller; this value does not include metadata. This value is reported

in thousands (that is, a value of 1 corresponds to 1000 units of 512

bytes read) and is rounded up. When the LBA size is a value other than

512 bytes, the controller shall convert the amount of data read to 512-

byte units.

9100 U.2 and HHHL NVMe PCIe SSDs

Supported Commands

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9100_hhhl_u2_nvme_pcie_ssd.pdf - Rev. I 03/17 EN

Micron Technology, Inc. reserves the right to change products or specifications without notice.

Table 11: SMART/Health Information (Log Identifier 02h) (Continued)

Bytes Name Description

63:48 Data units written Contains the number of 512-byte data units the host has written to the

controller; this value does not include metadata. This value is reported

in thousands (that is, a value of 1 corresponds to 1000 units of 512

bytes written) and is rounded up. When the LBA size is a value other

than 512 bytes, the controller shall convert the amount of data written

to 512-byte units. For the NVM command set, logical blocks written as

part of write operations shall be included in this value. Write uncor-

rectable commands shall not impact this value.

79:64 Host read commands Contains the number of read commands issued to the controller.

95:80 Host write commands Contains the number of write commands issued to the controller. For

the NVM command set, this is the number of write commands.

111:96 Controller busy time Contains the amount of time the controller is busy with I/O commands.

The controller is busy when there is a command outstanding to an I/O

queue (specifically, a command was issued via an I/O submission queue

tail doorbell write and the corresponding completion queue entry has

not been posted yet to the associated I/O completion queue.) This val-

ue is reported in minutes.

127:112 Power cycles Contains the number of power cycles.

143:128 Power-on hours Contains the number of power-on hours. This does not include time

that the controller was powered and in a low-power state condition.

159:144 Unsafe shutdowns Contains the number of unsafe shutdowns. This count is incremented

when a shutdown notification (CC.SHN) is not received prior to loss of

power.

175:160 Media errors Contains the number of occurrences where the controller detected an

unrecovered data integrity error. Errors such as uncorrectable ECC, CRC

checksum failure, or LBA tag mismatch are included in this field.

191:176 Number of error info log entries Contains the number of error information log entries over the life of

the controller.

511:192 Reserved Reserved.

Vendor Unique SMART

In addition to the standard SMART log, the 9100 provides the following details in a ven-

dor unique log:

Table 12: Vendor Unique SMART Attributes (Log Identifier CAh)

Bytes Name Description

0:1 F9 - NAND_writes_1GiB Raw value reports the number of writes to NAND in 1 GiB increments.

3:4 Normalized value

5:11 Current raw value

12:13 FA - NAND_reads_1GiB Raw value reports the number of reads to NAND in 1 GiB increments.

15:16 Normalized value

17:23 Current raw value

9100 U.2 and HHHL NVMe PCIe SSDs

Supported Commands

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9100_hhhl_u2_nvme_pcie_ssd.pdf - Rev. I 03/17 EN

Micron Technology, Inc. reserves the right to change products or specifications without notice.

Table 12: Vendor Unique SMART Attributes (Log Identifier CAh) (Continued)

Bytes Name Description

24:25 EA - Thermal throttle status Raw value indicates throttle status and total throttling time.

Byte 0: If set to 1, throttling is active; if set to 0, throttling is not active

Bytes 1-4: Total throttling time in minutes since power-on

Bytes 5: Reserved

27:28 Normalized value

29:35 Current raw value

36:37 E7 - Temperature Raw value reports the maximum and minimum temperature in Kelvin

over the lifetime of the device.

Byte 0-1: The maximum temperature sampled from the temperature

sensor

Bytes 2-3: The minimum temperature sampled from the temperature

sensor

Bytes 4-5: The current temperature sampled from the temperature sen-

sor

39:40 Normalized value

41:47 Current raw value

48:49 E8 - Power consumption Raw value reports the maximum and minimum average power con-

sumption in watts.

Byte 0-1: The maximum power consumption

Bytes 2-3: The minimum power consumption

Bytes 4-5: The average power consumption

51:52 Normalized value

53:59 Current raw value

60:61 AF - Power loss protection Normalized value reports the power loss protection status: 100 indi-

cates protection was successful; 0 indicates protection failed. A power

loss failure indicator will persist until a Format NVM command is execu-

ted.

63:64 Normalized value

65:71 Current raw value

Get/Set Features

The following features can be configured or retrieved using NVMe SET FEATURES and

GET FEATURES commands:

• 02h – Power management – Commands are accepted but values are not returned. A

custom power governor feature is utilized for power management.

• 04h – Temperature threshold

• 07h – Number of queues – Maximum supported is 128 for both submission and com-

pletion queues.

• 08h – Interrupt coalescing

• 09h – Interrupt vector configuration

• 0Bh – Asynchronous event configuration

Additionally, this custom feature is supported: C6h – Power governor. This feature con-

figures power limiting of the device. The following power modes are supported:

• 00h – 25W

• 01h – 20W

• FFh – No power limiting (30W MAX)

Feature identifier C0h indicates whether an invalid power setting has been set.

9100 U.2 and HHHL NVMe PCIe SSDs

Supported Commands

CCMTD-731836775-1

9100_hhhl_u2_nvme_pcie_ssd.pdf - Rev. I 03/17 EN

Micron Technology, Inc. reserves the right to change products or specifications without notice.

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