.7z.009 — 7-Zip archive part file
Igor Pavlov (7-Zip) · 2000
It's a segment of a larger, split 7-Zip archive, requiring all parts to be present to extract its contents.
Key Features
- Segment of a multi-volume 7-Zip archive.
- Requires all parts to be present for extraction.
- Uses the 7-Zip compression algorithm.
- Facilitates breaking down large archives.
Best For
- Compressing large collections of files efficiently.
- Creating archives that can be split into manageable sizes.
- Storing data with strong compression and optional encryption.
- Ensuring compatibility with the 7-Zip archiving standard.
Less Ideal For
- Single, small files where splitting is unnecessary.
- Situations where only one part of the archive is available.
- Formats requiring very fast, uncompressed access to individual files.
- Archiving where cross-platform compatibility without specific software is paramount.
Common Use Cases
- Storing or transferring very large files that exceed email or storage limits.
- Archiving large datasets or software installations.
- Distributing collections of files across multiple storage media.
- Ensuring data integrity during transfer by splitting and then reassembling.
How to Open It
- Ensure all parts of the multi-volume archive (.7z.001, .7z.002, ..., .7z.009) are downloaded and located in the same folder.
- Use a compatible archive utility like 7-Zip (Windows), Keka (macOS), or p7zip (Linux).
- Open the first part of the archive (e.g., .7z.001) with the chosen software; the program will automatically detect and use the subsequent parts.
What is a .7z.009 file?
This file extension, .7z.009, is not a standalone archive but rather the second part of a multi-volume archive created by the 7-Zip compression program. When you split a large 7z archive into smaller pieces, subsequent parts are named with sequential numbers like .001, .002, .003, and so on. The .7z.009 file represents a portion of the data that, when combined with all other parts (.7z.001, .7z.002, etc.), forms the complete, original archive. You cannot open or use this file individually; it requires the entire set of parts to be present.
Programs That Open .7z.009 Files
| Platform | Program | ||
|---|---|---|---|
| Windows | 7-Zip | Free | Official |
| PeaZip | Free | ||
| macOS | Keka | Paid | |
| The Unarchiver | Free | ||
| Linux | p7zip | Free | |
| PeaZip | Free | ||
| Android | RAR | Paid | |
| 7Zipper | Free | ||
| iOS | iZip | Free | |
| Documents by Readdle | Free |
Common Problems with .7z.009 Files
Frequently Asked Questions
A multi-volume archive is a large archive that has been split into smaller, numbered parts (e.g., .7z.001, .7z.002, .7z.009). This is done to make it easier to store or transfer large amounts of data.
No, the .7z.009 file is a segment of a larger archive. You must have all the preceding parts (starting from .7z.001) and open the first part to access the contents.
They are both parts of the same split 7-Zip archive. .7z.001 is the first segment, and .7z.009 is a subsequent segment, typically containing data that comes later in the original archive.
Technical Details
.7z.009 files are part of a split 7z archive, where the original archive has been divided into multiple segments for easier transfer or storage. These segments are concatenated and compressed using the 7z algorithm. The header signature for the 7z format (for the first file, .7z.001) is typically `37 7A BC AF 27 1C`. The subsequent files simply contain the continuation of the data stream.