Back صيغة القرص العالمية Arabic Universal Disk Format Catalan Universal Disk Format Czech UDF Danish Universal Disk Format German Universal Disk Format Spanish Universal Disk Format French Universal Disk Format Italian ユニバーサルディスクフォーマット Japanese 유니버설 디스크 포맷 Korean
| Developer(s) | ISO/IEC, Ecma International, OSTA |
|---|---|
| Full name | Universal Disk Format |
| Introduced | 1995 |
| Partition IDs | Not assigned but suggested:[1] 0x07 (MBR) EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (GPT) |
| Limits | |
| Max volume size | 2 TiB (with 512-byte sectors), 8 TiB (with 2 KiB sectors, like most optical discs), 16 TiB (with 4 KiB sectors)[a][2] |
| Max file size | 16 EiB |
| Max filename length | 255 bytes (path 1023 bytes[b]) |
| Allowed filename characters | Any 16-bit Unicode Code point excluding U+FEFF and U+FFFE |
| Features | |
| Dates recorded | creation, archive, modification (mtime), attribute modification (ctime), access (atime) |
| Date range |
|
| Date resolution | Microsecond |
| Forks | Yes |
| Attributes | Various |
| File system permissions | POSIX |
| Transparent compression | No |
| Other | |
| Supported operating systems | Various |
Universal Disk Format (UDF) is an open, vendor-neutral file system for computer data storage for a broad range of media. In practice, it has been most widely used for DVDs and newer optical disc formats, supplanting ISO 9660. Due to its design, it is very well suited to incremental updates on both write-once and re-writable optical media. UDF was developed and maintained by the Optical Storage Technology Association (OSTA).
In engineering terms, Universal Disk Format is a profile of the specifications known as ISO/IEC 13346 and ECMA-167.[4]
- ^ "Serverfault answer for: What is the partition id / filesystem type for UDF?".
- ^ "Wenguang's Introduction to Universal Disk Format (UDF)". Google Sites. 1 February 2009. Section 5.1 Highlight of the UDF Format. Retrieved 16 July 2014.
- ^ ECMA 167 third edition, June 1997
- ^ "ECMA-167 – Volume and File Structure for Write-Once and Rewritable Media using Non-Sequential Recording for Information Interchange" (PDF).
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