---
name: "nvme_voltage_measurement_log-libnvme3"
section: "2"
platform: "linux"
package: "nvme-cli"
version: "3.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/nvme_voltage_measurement_log-libnvme3"
---

# nvme\_voltage\_measurement\_log-libnvme3(2)

Voltage Measurement Log Page (Log Identifier 27h)

## NAME

struct nvme\_voltage\_measurement\_log - Voltage Measurement Log Page (Log Identifier 27h)

## SYNOPSIS

struct nvme\_voltage\_measurement\_log {\
     **\_\_u8 vmgn;**\
     **\_\_u8 vma;**\
     **\_\_le16 vsi;**\
     **\_\_le32 vmlsz;**\
     **\_\_le16 nvmds;**\
     **\_\_le16 nvmde;**\
     **\_\_le16 svmtr;**\
     **struct nvme\_timestamp   svmts;**\
     **\_\_le16 cntlid;**\
     **\_\_le16 vlvss;**\
     **\_\_u8 rsvd26\[6\];**\
     **\_\_le16 ovol;**\
     **\_\_le16 ovc;**\
     **\_\_le16 ovlt;**\
     **struct nvme\_timestamp   ovts;**\
     **\_\_u8 iovpe;**\
     **\_\_le16 uvol;**\
     **\_\_le16 uvc;**\
     **\_\_le16 uvlt;**\
     **struct nvme\_timestamp   uvts;**\
     **\_\_u8 iuvpe;**\
     **\_\_u8 rsvd62\[2\];**\
     **\_\_le16 ivmd\[\];**\
 };\

## Members

- vmgn

  Voltage Measurement Generation Number: incremented each time a Set Features command starts Voltage Measurements.

- vma

  Voltage Measurement Attributes, see *enum* *nvme\_voltage\_measurement\_vma*.

- vsi

  Voltage Sensor Info, see *enum nvme\_voltage\_measurement\_vsi*. Meaningless if the VMC bit is cleared to '0' in *vma*.

- vmlsz

  Voltage Measurement Log Size: size of this log page in bytes.

- nvmds

  Number of Voltage Measurement Descriptors Supported: maximum number of entries in the Interval Voltage Measurement Descriptor list.

- nvmde

  Number of Voltage Measurement Descriptors Entries: number of entries in *ivmd*.

- svmtr

  Stop Voltage Measurement Time Remaining, in minutes rounded up.

- svmts

  Stop Voltage Measurement Timestamp: time at which interval voltage measurements stopped being collected. See *struct* *nvme\_timestamp*.

- cntlid

  Controller Identifier associated with *vsi*, *svmts*, *ovts*, and *uvts*.

- vlvss

  Voltage Log Vendor Specific Size: size in bytes of the Vendor Specific field following *ivmd*.

- rsvd26

  Reserved

- ovol

  Overvoltage, see *enum nvme\_voltage\_measurement\_ovol*.

- ovc

  Overvoltage Count.

- ovlt

  Overvoltage Log Threshold, in units of the Voltage Sensor Sample Scale.

- ovts

  Overvoltage Timestamp. See *struct nvme\_timestamp*.

- iovpe

  Interval Overvoltage Percent Error (0 to 100). 255 indicates a value is not reported.

- uvol

  Undervoltage, see *enum nvme\_voltage\_measurement\_uvol*.

- uvc

  Undervoltage Count.

- uvlt

  Undervoltage Log Threshold, in units of the Voltage Sensor Sample Scale.

- uvts

  Undervoltage Timestamp. See *struct nvme\_timestamp*.

- iuvpe

  Interval Undervoltage Percent Error (0 to 100). 255 indicates a value is not reported.

- rsvd62

  Reserved

- ivmd

  Interval Voltage Measurement Descriptor list, see *enum* *nvme\_voltage\_measurement\_ivmd*. Followed by a Vendor Specific field of *vlvss* bytes, if non-zero.