# os.ErrDeadlineExceeded

- **ID:** `go/os-errdeadlineexceeded`
- **Domain:** go
- **Category:** system_error
- **Verification:** official
- **Fix Rate:** 80%

## Root Cause

File I/O operation timed out. The operation exceeded the deadline set on the file descriptor.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 1.x | active | — | — |