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Event ID 7: The device, …, has a bad block

Windows Event ID Lookup: What Windows event IDs mean: 4625, 4624, 4740, 6008, 41, 7045, 1102 and 3,000 more, with Windows' own message text, the fields and what to check.

Look up a Windows event ID from Event Viewer, a SIEM alert or a log export: what it means, the fields it records, and what to check. Many IDs are used by more than one source (event 41 is both a Kernel-Power crash and a boot error), so every definition is shown, the one people usually mean first. The message text is Windows' own, read from the event providers of Windows 10.0.26200.0, 2026-10-28; the notes are ours, based on Microsoft's security auditing reference.

Try: 4625, 4624, 4740, 6008, 41, 1074, 7045, 1102, 4104, 1149

The device, …, has a bad block.

Event 7
disk
System log
Error

The disk reported a bad block.

What to check: A sign of a failing drive: check SMART data, back it up and plan a replacement; on a VM check the storage underneath.

Related: 11, 51, 153

Message and fields (as Event Viewer shows them) 
The device, …, has a bad block.

Bootmgr duration is … milliseconds.

Event 7
Kernel-Boot
System log
Information
Message and fields (as Event Viewer shows them) 
Bootmgr duration is … milliseconds.

The time provider '…' returned an error while updating its configuration.

Event 7
Time-Service
System log
Warning
Message and fields (as Event Viewer shows them) 
The time provider '…' returned an error while updating its configuration. The error will be ignored. The error was: …

Ntfs has detected MFT torn write on a volume.

Event 7
Ntfs
System log
Warning
Message and fields (as Event Viewer shows them) 
Ntfs has detected MFT torn write on a volume.

           Volume correlation Id: …
           Volume name: …
           Volume label: …
           File reference: …
           File name: …
           Byte offset of the buffer within the file: …
           Byte offset of the torn structure within the buffer: …
           Block index: …
           Expected sequence number: …
           Actual sequence number: …
           FRS file reference: …
           FRS file name: …
           Is child FRS: …

Request Timer notification

Event 7
StorPort
System log
Information
Message and fields (as Event Viewer shows them) 
Request Timer notification

An error occurred while signing a message using the inserted smart card

Event 7
Security-Kerberos
System log
Information
Message and fields (as Event Viewer shows them) 
An error occurred while signing a message using the inserted smart card: …

SMB2 Request Cancel

Event 7
SMBServer
SMBServer/Operational log
Information
Message and fields (as Event Viewer shows them) 
SMB2 Request Cancel