Microsoft-Windows-EnhancedStorage-ClassDriver

9 events across 1 channel

Event	Title	Channel	Sample
101	Enhanced storage state changed on device with Class Disk Device Guid: …	Operational	N
102	Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid failed …	Operational	N
103	Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid was surpise …	Operational	N
104	Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid entered D0 …	Operational	N
105	Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid exited D0 …	Operational	N
106	Storage device PDO capabilities discovered on Class Disk Device Guid: …	Operational	N
107	The following informational event has occurred on Storage device with Class Disk …	Operational	N
108	The following warning event has occurred on Storage device with Class Disk …	Operational	N
109	The following error event has occurred on Storage device with Class Disk Device …	Operational	N

Event ID 101: Enhanced storage state changed on device with Class Disk Device Guid: ClassDeviceGuid.

Provider: Microsoft-Windows-EnhancedStorage-ClassDriver
Channel: Operational
Opcode: Info

Description

Enhanced storage state changed on device with Class Disk Device Guid: ClassDeviceGuid.

Message #

Enhanced storage state changed on device with Class Disk Device Guid: %5.                    
Device type: %6                    
Previous state: %7                    
New state: %8

Fields #

Name	Description
`PortNumber` UInt32
`PathID` UInt8
`TargetID` UInt8
`LUN` UInt8
`ClassDeviceGuid` GUID
`DeviceType` UInt8
`OldState` UInt8
`NewState` UInt8

Event ID 102: Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid failed command: Command.

Provider: Microsoft-Windows-EnhancedStorage-ClassDriver
Channel: Operational
Opcode: Info

Description

Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid failed command: Command.

Message #

Enhanced storage device with Class Disk Device Guid: %5 failed command: %6.

Fields #

Name	Description
`PortNumber` UInt32
`PathID` UInt8
`TargetID` UInt8
`LUN` UInt8
`ClassDeviceGuid` GUID
`Command` UnicodeString
`Status` HexInt32	NTSTATUS reference
`Parameter1Name` UnicodeString
`Parameter1Value` UInt64
`Parameter2Name` UnicodeString
`Parameter2Value` UInt64
`Parameter3Name` UnicodeString
`Parameter3Value` UInt64
`Parameter4Name` UnicodeString
`Parameter4Value` UInt64

Event ID 103: Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid was surpise removed.

Provider: Microsoft-Windows-EnhancedStorage-ClassDriver
Channel: Operational
Opcode: Info

Description

Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid was surpise removed.

Message #

Enhanced storage device with Class Disk Device Guid: %5 was surpise removed.                    
Device type: %6                    
Device state: %7

Fields #

Name	Description
`PortNumber` UInt32
`PathID` UInt8
`TargetID` UInt8
`LUN` UInt8
`ClassDeviceGuid` GUID
`DeviceType` UInt8
`DeviceState` UInt8

Event ID 104: Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid entered D0 power state.

Provider: Microsoft-Windows-EnhancedStorage-ClassDriver
Channel: Operational
Opcode: Info

Description

Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid entered D0 power state.

Message #

Enhanced storage device with Class Disk Device Guid: %5 entered D0 power state.                    
Device type: %6                    
Device state: %7

Fields #

Name	Description
`PortNumber` UInt32
`PathID` UInt8
`TargetID` UInt8
`LUN` UInt8
`ClassDeviceGuid` GUID
`DeviceType` UInt8
`DeviceState` UInt8

Event ID 105: Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid exited D0 power state.

Provider: Microsoft-Windows-EnhancedStorage-ClassDriver
Channel: Operational
Opcode: Info

Description

Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid exited D0 power state.

Message #

Enhanced storage device with Class Disk Device Guid: %5 exited D0 power state.                    
Device type: %6                    
Device state: %7

Fields #

Name	Description
`PortNumber` UInt32
`PathID` UInt8
`TargetID` UInt8
`LUN` UInt8
`ClassDeviceGuid` GUID
`DeviceType` UInt8
`DeviceState` UInt8

Event ID 106: Storage device PDO capabilities discovered on Class Disk Device Guid: ClassDeviceGuid.

Provider: Microsoft-Windows-EnhancedStorage-ClassDriver
Channel: Operational
Opcode: Info

Description

Storage device PDO capabilities discovered on Class Disk Device Guid: ClassDeviceGuid.

Message #

Storage device PDO capabilities discovered on Class Disk Device Guid: %5.                    
Device PDO Capabilities: %6

Fields #

Name	Description
`PortNumber` UInt32
`PathID` UInt8
`TargetID` UInt8
`LUN` UInt8
`ClassDeviceGuid` GUID
`DevicePdoCaps` UInt8

Event ID 107: The following informational event has occurred on Storage device with Class Disk Device Guid: ClassDeviceGuid.

Provider: Microsoft-Windows-EnhancedStorage-ClassDriver
Channel: Operational

Description

The following informational event has occurred on Storage device with Class Disk Device Guid: ClassDeviceGuid.

Message #

The following informational event has occurred on Storage device with Class Disk Device Guid: %5.                    
Message: %6                    
Parameter1Name: %7                    
Parameter1Value: %8                    
Parameter2Name: %9                    
Parameter2Value: %10                    
Parameter3Name: %11                    
Parameter3Value: %12                    
Parameter4Name: %13                    
Parameter4Value: %14                    
Parameter5Name: %15                    
Parameter5Value: %16                    
Parameter6Name: %17                    
Parameter6Value: %18                    
Parameter7Name: %19                    
Parameter7Value: %20                    
Parameter8Name: %21                    
Parameter8Value: %22

Fields #

Name	Description
`PortNumber` UInt32
`PathID` UInt8
`TargetID` UInt8
`LUN` UInt8
`ClassDeviceGuid` GUID
`Message` UnicodeString
`Parameter1Name` UnicodeString
`Parameter1Value` UInt64
`Parameter2Name` UnicodeString
`Parameter2Value` UInt64
`Parameter3Name` UnicodeString
`Parameter3Value` UInt64
`Parameter4Name` UnicodeString
`Parameter4Value` UInt64
`Parameter5Name` UnicodeString
`Parameter5Value` UInt64
`Parameter6Name` UnicodeString
`Parameter6Value` UInt64
`Parameter7Name` UnicodeString
`Parameter7Value` UInt64
`Parameter8Name` UnicodeString
`Parameter8Value` UInt64

Event ID 108: The following warning event has occurred on Storage device with Class Disk Device Guid: ClassDeviceGuid.

Provider: Microsoft-Windows-EnhancedStorage-ClassDriver
Channel: Operational

Description

The following warning event has occurred on Storage device with Class Disk Device Guid: ClassDeviceGuid.

Message #

The following warning event has occurred on Storage device with Class Disk Device Guid: %5.                    
Message: %6                    
Parameter1Name: %7                    
Parameter1Value: %8                    
Parameter2Name: %9                    
Parameter2Value: %10                    
Parameter3Name: %11                    
Parameter3Value: %12                    
Parameter4Name: %13                    
Parameter4Value: %14                    
Parameter5Name: %15                    
Parameter5Value: %16                    
Parameter6Name: %17                    
Parameter6Value: %18                    
Parameter7Name: %19                    
Parameter7Value: %20                    
Parameter8Name: %21                    
Parameter8Value: %22

Fields #

Name	Description
`PortNumber` UInt32
`PathID` UInt8
`TargetID` UInt8
`LUN` UInt8
`ClassDeviceGuid` GUID
`Message` UnicodeString
`Parameter1Name` UnicodeString
`Parameter1Value` UInt64
`Parameter2Name` UnicodeString
`Parameter2Value` UInt64
`Parameter3Name` UnicodeString
`Parameter3Value` UInt64
`Parameter4Name` UnicodeString
`Parameter4Value` UInt64
`Parameter5Name` UnicodeString
`Parameter5Value` UInt64
`Parameter6Name` UnicodeString
`Parameter6Value` UInt64
`Parameter7Name` UnicodeString
`Parameter7Value` UInt64
`Parameter8Name` UnicodeString
`Parameter8Value` UInt64

Event ID 109: The following error event has occurred on Storage device with Class Disk Device Guid: ClassDeviceGuid.

Provider: Microsoft-Windows-EnhancedStorage-ClassDriver
Channel: Operational

Description

The following error event has occurred on Storage device with Class Disk Device Guid: ClassDeviceGuid.

Message #

The following error event has occurred on Storage device with Class Disk Device Guid: %5.                    
Message: %6                    
Parameter1Name: %7                    
Parameter1Value: %8                    
Parameter2Name: %9                    
Parameter2Value: %10                    
Parameter3Name: %11                    
Parameter3Value: %12                    
Parameter4Name: %13                    
Parameter4Value: %14                    
Parameter5Name: %15                    
Parameter5Value: %16                    
Parameter6Name: %17                    
Parameter6Value: %18                    
Parameter7Name: %19                    
Parameter7Value: %20                    
Parameter8Name: %21                    
Parameter8Value: %22

Fields #

Name	Description
`PortNumber` UInt32
`PathID` UInt8
`TargetID` UInt8
`LUN` UInt8
`ClassDeviceGuid` GUID
`Message` UnicodeString
`Parameter1Name` UnicodeString
`Parameter1Value` UInt64
`Parameter2Name` UnicodeString
`Parameter2Value` UInt64
`Parameter3Name` UnicodeString
`Parameter3Value` UInt64
`Parameter4Name` UnicodeString
`Parameter4Value` UInt64
`Parameter5Name` UnicodeString
`Parameter5Value` UInt64
`Parameter6Name` UnicodeString
`Parameter6Value` UInt64
`Parameter7Name` UnicodeString
`Parameter7Value` UInt64
`Parameter8Name` UnicodeString
`Parameter8Value` UInt64

Provenance

Where this provider's schema came from, and which Windows build it was observed on. Windows can change a provider's event schema between builds, so use this to judge whether it matches the build you collect from.

ETW provider GUID f6cf91be-e7d7-57d6-2a3d-278ca406d190

Defined in EhStorClass.sys, the binary that emits these events.

Observed on:

WS2022-20348.4893, schema read from the registered manifest, binary version 10.0.20348.1, captured 2026-06-02
Win11-26200.6584, schema read from the registered manifest, binary version 10.0.26100.4484, captured 2026-06-02

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`gg` / `G`	Top / bottom
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`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
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`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)

Microsoft-Windows-EnhancedStorage-ClassDriver

Event ID 101: Enhanced storage state changed on device with Class Disk Device Guid: ClassDeviceGuid.

Description

Message #

Fields #

Event ID 102: Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid failed command: Command.

Description

Message #

Fields #

Event ID 103: Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid was surpise removed.

Description

Message #

Fields #

Event ID 104: Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid entered D0 power state.

Description

Message #

Fields #

Event ID 105: Enhanced storage device with Class Disk Device Guid: ClassDeviceGuid exited D0 power state.

Description

Message #

Fields #

Event ID 106: Storage device PDO capabilities discovered on Class Disk Device Guid: ClassDeviceGuid.

Description

Message #

Fields #

Event ID 107: The following informational event has occurred on Storage device with Class Disk Device Guid: ClassDeviceGuid.

Description

Message #

Fields #

Event ID 108: The following warning event has occurred on Storage device with Class Disk Device Guid: ClassDeviceGuid.

Description

Message #

Fields #

Event ID 109: The following error event has occurred on Storage device with Class Disk Device Guid: ClassDeviceGuid.

Description

Message #

Fields #

Provenance

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