NVME-GET-LOG(1) NVMe Manual NVME-GET-LOG(1) # [NAME](#NAME) nvme-get-log - Retrieves a log page from an NVMe device # [SYNOPSIS](#SYNOPSIS) ``` nvme [] get-log [--log-id= | -i ] [--log-len= | -l ] [--aen= | -a ] [--namespace-id= | -n ] [--raw-binary | -b] [--lpo= | -L ] [--lsp= | -s ] [--lsi= | -S ] [--rae | -r] [--csi= | -y ] [--ot= | -O ] [--xfer-len= | -x ] ``` # [DESCRIPTION](#DESCRIPTION) Retrieves an arbitrary NVMe log page from an NVMe device and provides the returned structure. The <device> parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1). On success, the returned log structure may be returned in one of several ways depending on the option flags; the structure may be displayed in hex by the program or the raw buffer may be printed to stdout for another program to parse. # [OPTIONS](#OPTIONS) -l <log-len>, --log-len=<log-len> Allocates a buffer of <log-len> bytes size and requests this many bytes be returned in the constructed NVMe command. This param is mandatory. -i <log-id>, --log-id=<log-id> Sets the commands requested log-id to <log-id>. Defaults to 0. Value Definition 0x00 | *supported-log-pages* Supported Log Pages 0x01 | *error* Error Information 0x02 | *smart* SMART / Health Information 0x03 | *fw-slot* Firmware Slot Information 0x04 | *changed-ns* Changed Namespace List 0x05 | *cmd-effects* Commands Supported and Effects 0x06 | *device-self-test* Device Self-test 0x07 | *telemetry-host* Telemetry Host-Initiated 0x08 | *telemetry-ctrl* Telemetry Controller-Initiated 0x09 | *endurance-group* Endurance Group Information 0x0a | *predictable-lat-nvmset* Predictable Latency Per NVM Set 0x0b | *predictable-lat-agg* Predictable Latency Event Aggregate 0x0c | *ana* Asymmetric Namespace Access 0x0d | *persistent-event* Persistent Event Log 0x0e | *lba-status* LBA Status Information 0x0f | *endurance-grp-evt* Endurance Group Event Aggregate 0x10 | *media-unit-status* Media Unit Status 0x11 | *supported-cap-config-list* Supported Capacity Configuration Lis 0x12 | *fid-supported-effects* Feature Identifiers Supported and Effects 0x13 | *mi-cmd-supported-effects* NVMe-MI Commands Supported and Effects 0x14 | *cmd-and-feat-lockdown* Command and Feature Lockdown 0x15 | *boot-partition* Boot Partition 0x16 | *rotational-media-info* Rotational Media Information 0x17 | *dispersed-ns-participating-ns* Dispersed Namespace Participating NVM Subsystems 0x18 | *mgmt-addr-list* Management Address List 0x19 | *phy-rx-eom* Physical Interface Receiver Eye Opening Measurement 0x1a | *reachability-groups* Reachability Groups 0x1b | *reachability-associations* Reachability Associations 0x1c | *changed-alloc-ns-list* Changed Allocated Namespace List 0x20 | *fdp-configs* FDP Configurations 0x21 | *fdp-ruh-usage* Reclaim Unit Handle Usage 0x22 | *fdp-stats* FDP Statistics 0x23 | *fdp-events* FDP Events 0x70 | *discover* Discovery 0x71 | *host-discover* Host Discovery 0x72 | *ave-discover* AVE Discovery 0x73 | *pull-model-ddc-req* Pull Model DDC Request 0x80 | *reservation* Reservation Notification 0x81 | *sanitize* Sanitize Status 0xbf | *zns-changed-zones* Changed Zone List -a <aen>, --aen=<aen> Convenience field for extracting log information based on an asynchronous event notification result. This will override log-id and log-len, if set. -n <nsid>, --namespace-id=<nsid> Sets the command’s nsid value to the given nsid. Defaults to 0xffffffff if not given. This option may not affect anything depending on the log page, which may or may not be specific to a namespace. -b, --raw-binary Print the raw log buffer to stdout. -L <offset>, --lpo=<offset> The log page offset specifies the location within a log page to start returning data from. It’s Dword-aligned and 64-bits. -s <field>, --lsp=<field> The log specified field of LID. -S <field>, --lsi=<field> The log specified field of Log Specific Identifier. -r, --rae Retain an Asynchronous Event. -y <command\_set\_identifier>, --csi=<command\_set\_identifier> This field specifies the identifier of command set. if not issued, NVM Command Set will be selected. -O, --ot This field specifies the offset type. If set to false, the Log Page Offset Lower field and the Log Page Offset Upper field specify the byte offset into the log page to be returned. If set to true, the Log Page Offset Lower field and the Log Page Offset Upper field specify the index into the list of data structures in the log page to be returned. The default is byte offset. If the option is specified the index mode is used. -x <length> --xfer-len <length>: Specify the read chunk size. The length argument is expected to be a multiple of 4096. The default size is 4096. # [GLOBAL OPTIONS](#GLOBAL_OPTIONS) The following options are defined at the top-level nvme command and are available to this subcommand: --dry-run Print the command that would be executed, but do not actually execute it. --no-ioctl-probing Disable probing for 64-bit IOCTL support. --no-retries Disable retry logic on transient errors. -o <fmt>, --output-format=<fmt> Set the reporting format to *normal*, *tabular, 'json*, or *binary*. Only one output format may be used at a time. --output-format-version=<version> Select the output format version. Version *1* uses the original field naming, while version *2* (default) provides more consistent and script-friendly field names. --timeout=<ms> Set the timeout for the command in milliseconds. -v, --verbose Increase the level of detail in the output. May be specified multiple times to further increase verbosity. These options can also be set as machine-wide defaults in [nvme-cli.conf(5)](/man/os/nvme-cli/nvme-cli.conf.5). A command-line flag always overrides the file. # [EXAMPLES](#EXAMPLES) •Get 512 bytes from log page 2 ``` # nvme get-log /dev/nvme0 --log-id=2 --log-len=512 ``` The above example will get log page 2 (SMART), and request 512 bytes. On success, the returned log will be dumped in hex and not interpreted by the program. •Have the program return the raw log page in binary: ``` # nvme get-log /dev/nvme0 -log-id=2 --log-len=512 --raw-binary > log_page_2.raw # nvme get-log /dev/nvme0 -i 2 -l 512 -b > log_page_2.raw ``` It is not a good idea to not redirect stdout when using this mode. # [NVME](#NVME) Part of the nvme-user suite 09/18/2026 NVMe --- Document: nvme-get-log(1) from nvme-cli 3.1-r0 (Chainguard OS) Source: https://github.com/linux-nvme/nvme-cli