.TH "libnvme" 9 "struct nvme_voltage_measurement_log" "October 2026" "API Manual" LINUX
.SH NAME
struct nvme_voltage_measurement_log \- Voltage Measurement Log Page (Log Identifier 27h)
.SH SYNOPSIS
struct nvme_voltage_measurement_log {
.br
.BI "    __u8 vmgn;"
.br
.BI "    __u8 vma;"
.br
.BI "    __le16 vsi;"
.br
.BI "    __le32 vmlsz;"
.br
.BI "    __le16 nvmds;"
.br
.BI "    __le16 nvmde;"
.br
.BI "    __le16 svmtr;"
.br
.BI "    struct nvme_timestamp   svmts;"
.br
.BI "    __le16 cntlid;"
.br
.BI "    __le16 vlvss;"
.br
.BI "    __u8 rsvd26[6];"
.br
.BI "    __le16 ovol;"
.br
.BI "    __le16 ovc;"
.br
.BI "    __le16 ovlt;"
.br
.BI "    struct nvme_timestamp   ovts;"
.br
.BI "    __u8 iovpe;"
.br
.BI "    __le16 uvol;"
.br
.BI "    __le16 uvc;"
.br
.BI "    __le16 uvlt;"
.br
.BI "    struct nvme_timestamp   uvts;"
.br
.BI "    __u8 iuvpe;"
.br
.BI "    __u8 rsvd62[2];"
.br
.BI "    __le16 ivmd[];"
.br
.BI "
};
.br

.SH Members
.IP "vmgn" 12
Voltage Measurement Generation Number: incremented each time a
Set Features command starts Voltage Measurements.
.IP "vma" 12
Voltage Measurement Attributes, see \fIenum
nvme_voltage_measurement_vma\fP.
.IP "vsi" 12
Voltage Sensor Info, see \fIenum nvme_voltage_measurement_vsi\fP.
Meaningless if the VMC bit is cleared to '0' in \fIvma\fP.
.IP "vmlsz" 12
Voltage Measurement Log Size: size of this log page in bytes.
.IP "nvmds" 12
Number of Voltage Measurement Descriptors Supported: maximum
number of entries in the Interval Voltage Measurement Descriptor
list.
.IP "nvmde" 12
Number of Voltage Measurement Descriptors Entries: number of
entries in \fIivmd\fP.
.IP "svmtr" 12
Stop Voltage Measurement Time Remaining, in minutes rounded up.
.IP "svmts" 12
Stop Voltage Measurement Timestamp: time at which interval
voltage measurements stopped being collected. See \fIstruct
nvme_timestamp\fP.
.IP "cntlid" 12
Controller Identifier associated with \fIvsi\fP, \fIsvmts\fP, \fIovts\fP, and
\fIuvts\fP.
.IP "vlvss" 12
Voltage Log Vendor Specific Size: size in bytes of the Vendor
Specific field following \fIivmd\fP.
.IP "rsvd26" 12
Reserved
.IP "ovol" 12
Overvoltage, see \fIenum nvme_voltage_measurement_ovol\fP.
.IP "ovc" 12
Overvoltage Count.
.IP "ovlt" 12
Overvoltage Log Threshold, in units of the Voltage Sensor Sample
Scale.
.IP "ovts" 12
Overvoltage Timestamp. See \fIstruct nvme_timestamp\fP.
.IP "iovpe" 12
Interval Overvoltage Percent Error (0 to 100). 255 indicates a
value is not reported.
.IP "uvol" 12
Undervoltage, see \fIenum nvme_voltage_measurement_uvol\fP.
.IP "uvc" 12
Undervoltage Count.
.IP "uvlt" 12
Undervoltage Log Threshold, in units of the Voltage Sensor
Sample Scale.
.IP "uvts" 12
Undervoltage Timestamp. See \fIstruct nvme_timestamp\fP.
.IP "iuvpe" 12
Interval Undervoltage Percent Error (0 to 100). 255 indicates a
value is not reported.
.IP "rsvd62" 12
Reserved
.IP "ivmd" 12
Interval Voltage Measurement Descriptor list, see \fIenum
nvme_voltage_measurement_ivmd\fP. Followed by a Vendor Specific
field of \fIvlvss\fP bytes, if non-zero.