OPENSEACHEST_POWERCONTROL(1)

NAME
openSeaChest_PowerControl - manual page for openSeaChest_PowerControl ==========================================================================================

DESCRIPTION
==========================================================================================

    openSeaChest_PowerControl - openSeaChest drive utilities - NVMe Enabled Copyright (c) 2014-2026 Seagate Technology LLC and/or its Affiliates, All Rights Reserved openSeaChest_PowerControl Version: 26.03.2 X86_64 Build Date: May 18 2026 Today: 20260605T144116 User: current user

========================================================================================== Usage =====

    openSeaChest_PowerControl [-d <sg_device>] {arguments} {options}

Examples ========

    openSeaChest_PowerControl --scan openSeaChest_PowerControl -d /dev/sg<#> -i openSeaChest_PowerControl -d /dev/sg<#> --SATInfo openSeaChest_PowerControl -d /dev/sg<#> --llInfo openSeaChest_PowerControl -d /dev/sg<#> --checkPowerMode openSeaChest_PowerControl -d /dev/sg<#> --showEPCSettings openSeaChest_PowerControl -d /dev/sg<#> --idle_a 5000 openSeaChest_PowerControl -d /dev/sg<#> --idle_b disable openSeaChest_PowerControl -d /dev/sg<#> --transitionPower standby_z openSeaChest_PowerControl -d /dev/sg<#> --spinDown openSeaChest_PowerControl -d /dev/sg<#> --transitionPowerState 1 openSeaChest_PowerControl -d /dev/sg<#> --showNVMPowerStates openSeaChest_PowerControl -d /dev/sg<#> --idle_a 5000 --standby_z 30000 --idle_b enable --idle_c disable openSeaChest_PowerControl -d /dev/sg<#> --showPowerTelemetry openSeaChest_PowerControl -d /dev/sg<#> --requestPowerMeasurement 120 --powerMeasurementMode 12 openSeaChest_PowerControl -d /dev/sg<#> --EPCfeature enable openSeaChest_PowerControl -d /dev/sg<#> --standby 15000 openSeaChest_PowerControl -d /dev/sg<#> --idle 5000 openSeaChest_PowerControl -d /dev/sg<#> --showAPMLevel openSeaChest_PowerControl -d /dev/sg<#> --setAPMLevel 128 openSeaChest_PowerControl -d /dev/sg<#> --showPowerConsumption openSeaChest_PowerControl -d /dev/sg<#> --setPowerConsumption 12 openSeaChest_PowerControl -d /dev/sg<#> --setPowerConsumption lowest

Return codes ============

    Generic/Common exit codes 0 = No Error Found 1 = Error in command line options 2 = Invalid Device Handle or Missing Device Handle 3 = Operation Failure 4 = Operation not supported 5 = Operation Aborted 6 = File Path Not Found 7 = Cannot Open File 8 = File Already Exists 9 = Need Elevated Privileges 10 = Not enough resources 11 = Error Writing File 12 = Device not found when opening handle. 13 = Device not opened. Handle is busy. 14 = Insecure Directory to read or write file Anything else = unknown error

Utility Options ===============

--csmiIgnorePort (Obsolete)

    This option is obsolete and will be removed in future versions.

--csmiUsePort (Obsolete)

    This option is obsolete and will be removed in future versions.

--csmiVerbose (Obsolete)

    This option is obsolete and will be removed in future versions.

--echoCommandLine

    Echo the command line entered into the utility on the screen.

--enableLegacyUSBPassthrough

    Only use this option on old USB or IEEE1394 (Firewire) products that do not otherwise work with the tool. This option will enable a trial and error method that attempts sending various ATA Identify commands through vendor specific means. Because of this, certain products that may respond in unintended ways since they may interpret these commands differently than the bridge chip the command was designed for.

--forceATA

    Using this option will force the current drive to be treated as a ATA drive. Only ATA commands will be used to talk to the drive.

--forceATADMA
    (SATA Only)

    Using this option will force the tool to issue SAT commands to ATA device using the protocol set to DMA whenever possible (on DMA commands). This option can be combined with --forceATA

--forceATAPIO
    (SATA Only)

    Using this option will force the tool to issue PIO commands to ATA device when possible. This option can be combined with --forceATA

--forceATAUDMA
    (SATA Only)

    Using this option will force the tool to issue SAT commands to ATA device using the protocol set to UDMA whenever possible (on DMA commands). This option can be combined with --forceATA

--forceSCSI

    Using this option will force the current drive to be treated as a SCSI drive. Only SCSI commands will be used to talk to the drive.

-h, --help

    Show utility options and example usage (this output you see now) Please report bugs/suggestions to seaboard@seagate.com. Include the output of --version information in the email.

--license

    Display the Seagate End User License Agreement (EULA).

--modelMatch [model Number]

    Use this option to run on all drives matching the provided model number. This option will provide a closest match although an exact match is preferred. Ex: ST500 will match ST500LM0001

--noBanner

    Use this option to suppress the text banner that displays each time openSeaChest is run.

--onlyFW [firmware revision]

    Use this option to run on all drives matching the provided firmware revision. This option will only do an exact match.

--onlySeagate

    Use this option to match only Seagate drives for the options provided

-q, --quiet

    Run openSeaChest_PowerControl in quiet mode. This is the same as -v 0 or --verbose 0

-v [0-4], --verbose [0 | 1 | 2 | 3 | 4]

    Show verbose information. Verbosity levels are: 0 - quiet 1 - default 2 - command descriptions 3 - command descriptions and values 4 - command descriptions, values, and data buffers Example: -v 3 or --verbose 3

-V, --version

    Show openSeaChest_PowerControl version and copyright information & exit

Utility Arguments =================

-d, --device [deviceHandle | all]

    Use this option with most commands to specify the device handle on which to perform an operation. Example: /dev/sg<#> CSMI device handles can be specified as <error<#><#><#>> To run across all devices detected in the system, use the "all" argument instead of a device handle. Example: -d all NOTE: The "all" argument is handled by running the

specified options on each drive detected in the
    OS sequentially. For parallel operations, please use a script opening a separate instance for each device handle.

-F, --scanFlags [option list]

    Use this option to control the output from scan with the options listed below. Multiple options can be combined.

ata - show only ATA (SATA) devices
    usb - show only USB devices scsi - show only SCSI (SAS) devices nvme - show only NVMe devices interfaceATA - show devices on an ATA interface interfaceUSB - show devices on a USB interface interfaceSCSI - show devices on a SCSI or SAS interface interfaceNVME = show devices on an NVMe interface sd - show sd device handles sgtosd - show the sd and sg device handle mapping ignoreCSMI - do not scan for any CSMI devices allowDuplicates - allow drives with both CSMI and PD handles

    to show up multiple times in the list

-i, --deviceInfo

    Show information and features for the storage device

--llInfo

    Dump low-level information about the device to assist with debugging.

-s, --scan

    Scan the system and list all storage devices with logical /dev/sg<#> assignments. Shows model, serial and firmware numbers. If your device is not listed on a scan immediately after booting, then wait 10 seconds and run it again.

-S, --Scan

    This option is the same as --scan or -s, however it will also perform a low level rescan to pick up other devices. This low level rescan may wake devices from low power states and may cause the OS to re-enumerate them. Use this option when a device is plugged in and not discovered in a normal scan. NOTE: A low-level rescan may not be available on all interfaces or all OSs. The low-level rescan is not guaranteed to find additional devices in the system when the device is unable to come to a ready state.

--SATInfo

    Displays SATA device information on any interface using both SCSI Inquiry / VPD / Log reported data (translated according to SAT) and the ATA Identify / Log reported data.

--testUnitReady

    Issues a SCSI Test Unit Ready command and displays the status. If the drive is not ready, the sense key, asc, ascq, and fru will be displayed and a human readable translation from the SPC spec will be displayed if one is available.

--fastDiscovery

Use this option
    to issue a fast scan on the specified drive.

--checkPowerMode

    Get the current power mode of a drive. On SCSI devices, this will only work if the drive has transitioned from active state to another state.

--EPCfeature [enable | disable]

    Enables or disables Extended Power Conditions (EPC) support for devices. To disable EPC use --EPCfeature disable. Note that the EPC Feature Set is not supported on all devices. Use --deviceInfo option to see if EPC is supported.

WARNING: The EPC settings may affect all LUNs/namespaces for devices
    with multiple logical units or namespaces.

--idle_a [ enable | disable | default | timerValueMilliseconds ]

Use this setting to change the EPC Idle_A power mode settings.
    enable - enable the power state disable - disable the power state default - restore default settings for this power state timerValue - number of milliseconds to set for the timer

used in this power state. If a timer is provided
    the state will also be enabled, if not already. EPC spec timers are set in 100 millisecond increments. Timers will be truncated to fit 100 millisecond increments.

    When using this option, the setting is non-volatile. Use this with the --volatile flag to make the setting volatile. WARNING: EPC Settings may affect all LUNs/namespaces for devices

    with multiple logical units or namespaces.

--idle_b [ enable | disable | default | timerValueMilliseconds ]

Use this setting to change the EPC Idle_B power mode settings.
    enable - enable the power state disable - disable the power state default - restore default settings for this power state timerValue - number of milliseconds to set for the timer

used in this power state. If a timer is provided
    the state will also be enabled, if not already. EPC spec timers are set in 100 millisecond increments. Timers will be truncated to fit 100 millisecond increments.

    When using this option, the setting is non-volatile. Use this with the --volatile flag to make the setting volatile. WARNING: EPC Settings may affect all LUNs/namespaces for devices

    with multiple logical units or namespaces.

--idle_c [ enable | disable | default | timerValueMilliseconds ]

Use this setting to change the EPC Idle_C power mode settings.
    enable - enable the power state disable - disable the power state default - restore default settings for this power state timerValue - number of milliseconds to set for the timer

used in this power state. If a timer is provided
    the state will also be enabled, if not already. EPC spec timers are set in 100 millisecond increments. Timers will be truncated to fit 100 millisecond increments.

    When using this option, the setting is non-volatile. Use this with the --volatile flag to make the setting volatile. WARNING: EPC Settings may affect all LUNs/namespaces for devices

    with multiple logical units or namespaces.

--powerMeasurementMode [all | 5 | 12]
    (Seagate Only)

    Use this option along with --requestPowerMeasurement to specify which sources to measure power on for the requested time.

    all - measure all power sources 5 - measure only the 5v power 12 - measure only the 12v power

--requestPowerMeasurement [seconds to perform measurement]
    (Seagate Only)

    This option is used to specify a time to perform a power measurement for. The minimum measurement time is 22 seconds and the maximum is 65535 seconds. If a time less than 22 seconds is provided, 22 seconds will be used by the drive. A value greater than 65535 will result in error. Use the --powerMeasurementMode option to specify which mode to measure.

--powerBalanceFeature [ info | enable | disable | limited]
    (Seagate Only)

    Use this option to see the state of the Seagate Power Balance feature or to change its state. Seagate's PowerBalance feature will adjust drive performance during random operations to reduce power consumption of the drive.

    info - will dump the state of the Power Balance feature on the screen enable - use this to enable Power Balance (lowest power consumption) disable - use this to disable Power Balance (hihgest power consumption) limited - 12w limited mode. Dual actuator SATA only

    Note: While this feature is available on some SAS products, it is recommended that the --setPowerConsumption option is used instead since it allows more levels of control. This option and the --setPowerConsumption option are incompatible because they use the same mode page fields (1Ah-01h).

WARNING: Seagate Power Balance may affect all LUNs/namespaces for devices
    with multiple logical units or namespaces.

--showEPCSettings

    Use this option to show the current EPC settings on the screen. Only drives supporting the EPC feature will show this data and only supported power conditions will be shown.

--showPowerTelemetry
    (Seagate Only)

    Use this option to show the power telemetry data from a Seagate drive that supports the power telemetry feature If a measurement was not previously requested, this will show free-running mode data from the last 10 minutes. If this option is provided while a measurement is still in progress, this will show all data that is currently available Use the --requestPowerMeasurement option to request a power measurement with a set time window.

NOTE: Power measurements are for the full device, not individual
    logical units. All logical units will be measured for this data.

--spinDown

    Removes power to the disk drive motor with the Standby Immediate command. Use this before moving a hard disk drive. The drive will spin back up if the operating system selects the drive. This means that an active drive will not stay spun down.

WARNING: Spindown may affect all LUNs/namespaces for devices
    with multiple logical units or namespaces.

--standby [ enable | disable | default | timerValueMilliseconds ] (Some settings are SAS only)

    Use this setting to change the standby power mode settings. NOTE: This is the legacy standby timer before EPC drives.

If this is used on an EPC drive, this will modify
    the standby_z power state and timer values.

enable
    - enable the power state (SAS Only)

disable - disable the power state
    (SAS Only)

default - restore default settings for this power state
    (SAS Only)

timerValue - number of milliseconds to set for the timer
    used in this power state. If a timer is provided the state will also be enabled, if not already. Spec timers are set in 100 millisecond increments. Timers will be truncated to fit 100 millisecond increments.

    When using this option, the setting is non-volatile. Use this with the --volatile flag to make the setting volatile. ATA drives can only change the standby timer, not disable it. On ATA drives, the standby timer set by this command is volatile and drive defaults are restored on next power cycle.

WARNING: EPC Settings may affect all LUNs/namespaces for devices
    with multiple logical units or namespaces.

--standby_y [ enable | disable | default | timerValueMilliseconds ]

Use this setting to change the EPC Standby_Y power mode settings.
    enable - enable the power state disable - disable the power state default - restore default settings for this power state timerValue - number of milliseconds to set for the timer

used in this power state. If a timer is provided
    the state will also be enabled, if not already. EPC spec timers are set in 100 millisecond increments. Timers will be truncated to fit 100 millisecond increments.

    When using this option, the setting is non-volatile. Use this with the --volatile flag to make the setting volatile. WARNING: EPC Settings may affect all LUNs/namespaces for devices

    with multiple logical units or namespaces.

--standby_z [ enable | disable | default | timerValueMilliseconds ]

Use this setting to change the EPC Standby_Z power mode settings.
    enable - enable the power state disable - disable the power state default - restore default settings for this power state timerValue - number of milliseconds to set for the timer

used in this power state. If a timer is provided
    the state will also be enabled, if not already. EPC spec timers are set in 100 millisecond increments. Timers will be truncated to fit 100 millisecond increments.

    When using this option, the setting is non-volatile. Use this with the --volatile flag to make the setting volatile. WARNING: EPC Settings may affect all LUNs/namespaces for devices

    with multiple logical units or namespaces.

--transitionPower [active | idle | idleUnload | standby | idle_a | idle_b | idle_c | standby_y | standby_z | sleep]

    Use this option to transition the drive to a specific power state. EPC and legacy power states are supported. EPC states are only available on devices supporting the EPC feature. Supported power states:

    active idle - idle mode (legacy mode equivalent to idle_a on EPC) idleUnload - same as above, but heads are unloaded. This may not

    be supported on all devices.

    standby - standby mode (legacy mode equivalent to standby_z on EPC) idle_a - EPC idle mode idle_b - EPC lower power idle mode idle_c - EPC lowest power idle mode standby_y - EPC low power standby mode standby_z - EPC lowest power standby mode sleep - Sleep state. WARNING: This requires a reset to wake from.

Once in this state, this tool cannot wake the drive on its own.
    The OS or adapter will need to issue a reset, which may or may not happen.

WARNING: Transitioning power modes may affect all LUNs/namespaces
    for devices with multiple logical units or namespaces.

    SATA Only: ========= --disableAPM (SATA Only)

    Use this option to disable the APM feature on a device. Note: This command is optional and some device may not

    disabling the APM feature.

--sataDAPSfeature [info | enable | disable]
    (SATA Only)

    Use this option to enable or disable the SATA Device Automatic Partial To Slumber Transitions (DAPS) feature. Use the "info" option to see the current state of the DIPM feature on the device. The use of this feature requires that the DIPM feature is enabled. NOTE: Please ensure that the host adapter/controller/driver can handle this before enabling it, otherwise the drive link may go down and the device will not be able to communicate.

--sataDIPMfeature [info | enable | disable]
    (SATA Only)

    Use this option to enable or disable the SATA Device Initiated Power Management (DIPM) feature. Use the "info" option to see the current state of the DIPM feature on the device. NOTE: Please ensure that the host adapter/controller/driver can handle this before enabling it, otherwise the drive link may go down and the device will not be able to communicate.

--puisFeature [ info | spinup | enable | disable ]
    (SATA Only)

    Use this option to enable or disable the power up in standby (PUIS) feature on SATA drives. Arguments:

info
    - display information about the PUIS support on the device

spinup
    - issue the PUIS spinup set features command to spin up

the device to active/idle state.
    enable - enable the PUIS feature using setfeatures command disable - disable the PUIS feature using setfeatures command

Note: If this is configured on the drive with a jumper, this
    command will fail.

    Note2: Not all products support this feature. WARNING: Before enabling this feature on any SAS/SATA HBA,

check the HBA documentation to see if this feature
    is supported by the HBA. Enabling this on an HBA that does not support this feature will cause the drive to stop showing up to the host OS or even in the HBA's firmware/BIOS/UEFI configuration.

--setAPMLevel [1 - 254]
    (SATA Only)

    Use this option to set the APM level of a device. Valid values are between 1 and 254.

1 = Minimum power consumption with standby mode
    2-127 = Intermediate power management with standby

mode
    128 = Minimum power consumption without standby mode 129-253 = Intermediate power management without

standby mode
    254 = Maximum Performance.

--showAPMLevel
    (SATA Only)

    Use this option to show the current APM level of a device

    SAS Only: ========= --idle [ enable | disable | default | timerValueMilliseconds ] (SAS Only)

    Use this setting to change the idle power mode settings. NOTE: This is the legacy idle timer before EPC drives.

If this is used on an EPC drive, this will modify
    the idle_a power state and timer values.

enable
    - enable the power state

disable - disable the power state
    default - restore default settings for this power state timerValue - number of milliseconds to set for the timer

used in this power state. If a timer is provided
    the state will also be enabled, if not already. Spec timers are set in 100 millisecond increments. Timers will be truncated to fit 100 millisecond increments.

    When using this option, the setting is non-volatile. Use this with the --volatile flag to make the setting volatile. This is only available on SAS/SCSI drives as ATA drives did not have a separate configurable idle timer.

WARNING: EPC Settings may affect all LUNs/namespaces for devices
    with multiple logical units or namespaces.

--sasPhy [phy number] (SAS Only)

    Use this option to specify a specific phy to use with another option that uses a phy identifier value. Some tool options will assume all SAS Phys when this option is not present. Others will produce an error when a specific phy is needed for an operation. Use the -i option to learn more about the supported phys.

--sasPhyPartial [info | enable | disable] (SAS Only)

    Use this option to enable or disable the partial phy power condition. This is from the enhanced phy control mode page. Use the --sasPhy option to specify an individual phy, otherwise this will be changed on all phys. WARNING: Configuring this setting may cause the drive to be undetectable by other hardware if this power condition is not supported by a controller or expander.

WARNING: Changing SAS Phy partial may affect all LUNs/namespaces for devices
    with multiple logical units or namespaces.

--sasPhySlumber [info | enable | disable] (SAS Only)

    Use this option to enable or disable the slumber phy power condition. This is from the enhanced phy control mode page. Use the --sasPhy option to specify an individual phy, otherwise this will be changed on all phys. WARNING: Configuring this setting may cause the drive to be undetectable by other hardware if this power condition is not supported by a controller or expander.

WARNING: Changing SAS Phy slumber may affect all LUNs/namespaces for devices
    with multiple logical units or namespaces.

--setPowerConsumption [default | highest | intermediate | lowest | watt value]
    (SAS Only)

    This option will set the power consumption rate of the device to the value input. Options: -default - sets the device back to default settings -highest - sets the active level to "highest" -intermediate - sets the active level to "intermediate" -lowest - sets the active level to "lowest" -watt value - sets the device to a nearest watt value less than or equal to the value entered. Power consumption watt values are listed with the --showPowerConsumption command line option.

--showPowerConsumption
    (SAS Only)

    This option will show the power consumption rates supported by the device and the current power consumption rate of the device. Use a supported watt value with the --setPowerConsumption option to set the power consumption to that value.

    NVMe Only: ========= --showNVMPowerStates (NVMe Only)

    Use this option to display a device's supported power states.

--transitionPowerState [new power state]
    (NVMe Only)

    Use this option to transition to a specific power state. WARNING: Transitioning the drive to a non-operational power state

may make the device stop responding. The operating system
    may or may not block this transition. It is recommended to only use this option for operational power states

    HINT:

    Use --showNVMPowerStates to view the supported states

    openSeaChest_PowerControl - openSeaChest drive utilities - NVMe Enabled Copyright (c) 2014-2026 Seagate Technology LLC and/or its Affiliates, All Rights Reserved openSeaChest_PowerControl Version: 26.03.2 X86_64 Build Date: May 18 2026 Today: 20260605T144117 User: current user

========================================================================================== Version Info for openSeaChest_PowerControl:

    Utility Version: 26.03.2 opensea-common Version: 6.1.0 opensea-transport Version: 10.3.0 opensea-operations Version: 9.4.0 Build Date: May 18 2026 Compiled Architecture: X86_64 Detected Endianness: Little Endian Compiler Used: GCC Compiler Version: 14.2.0 Operating System Type: Linux Operating System Version: 6.6.114-1 Operating System Name: Ubuntu 24.04.4 LTS

SEE ALSO
The full documentation for openSeaChest_PowerControl is maintained as a Texinfo manual. If the info and openSeaChest_PowerControl programs are properly installed at your site, the command

    info openSeaChest_PowerControl

should give you access to the complete manual.