PERSISTENT−EVENT−L - Online Linux Manual PageSection : 1
Updated : 02/01/2023
Source : NVMe
Note : NVMe Manual
NAMEnvme-persistent-event-log − Send NVMe persistent event log page request, returns result and log
SYNOPSISnvme persistent−event−log <device> [−−action=<action> | −a <action>] [−−log−len=<log−len> | −l <log−len>] [−−raw−binary | −b] [−−output−format=<fmt> | −o <fmt>]
DESCRIPTIONRetrieves the NVMe persistent event 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 persistent event log structure may be returned in one of several ways depending on the option flags; the structure may parsed by the program and printed in a readable format or the raw buffer may be printed to stdout for another program to parse​.
OPTIONS−a <action>, −−action=<action> While try to retrieve this log action the controller shall take during processing this persistent log page command​. This mandatory field, based on the value issued it may Read Log Data, Establish Context and Read Log Data or Release Context can occur​. For More details see NVM Express 1​.4 Spec​. Section 5​.14​.1​.13 Persistent Event Log (Log Identifier 0Dh) −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​. If <log−len> given is 0 and action is 0, it will read the Total Log Length(TLL) of the page​. −b, −−raw−binary Print the raw persistent event log buffer to stdout​. −o <format>, −−output−format=<format> Set the reporting format to normal, json, or binary​. Only one output format can be used at a time​.
EXAMPLES•  Print the persistent event log page in a human readable format: # nvme persistent−event−log /dev/nvme0•  Print the raw persistent event log to a file: # nvme persistent−event−log /dev/nvme0 −−raw−binary > persistent_log​.rawIt is probably a bad idea to not redirect stdout when using this mode​.
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