Microsoft NTFS by Tuxera

Android, Linux, QNX
Features and/or specifications may vary depending on the operating
system.

• ARM, ARM64, Intel x86/x86_64 or compatible, MIPS, PowerPC,
SuperH, and more
• Support for all NTFS versions (1.0, 1.1, 1.2, 3.0 and 3.1), including XP,
Vista, Windows 7, Windows 8.0,
• Windows 8.1, and Windows 10
• Support for all storage types like eMMC, eSD, SD card, CF card, UFS,
memory stick, SSD, HDD via USB, SATA, eSATA, FireWire, MMC,
and more

• Maximum volume size:
‒ 32-bit system without CONFIG_LBD enabled in the kernel: 2TiB
‒ 64-bit system and 32-bit system with CONFIG_LBD enabled in the
kernel, depends on cluster size:

• Maximum cluster size: 2048 KiB
‒ Maximum file size:
32-bit system:
• 8 TiB with 4 kiB CPU page size
• 128 TiB with 64 kiB CPU page size
‒ 64-bit system: 8 EiB
• Maximum filename length: 255 characters (16-bit)
• File size field length: 64-bit
• Supported sector sizes: 512, 1024, 2048, and 4096 bytes

• No practical limit on number of files, folders, file sizes,
and partition sizes
• Directory contents stored in B+ tree structures

• RAM: 1 MB
• Processor: 25 MHz

• Read-write: 140-280 KiB
• Read-only: 60-90 KiB
• CPU usage: 0-10%

Volume consistency ensured if storage is removed, or power or battery is
disconnected

Tuxera maintains POSIX File System Test Suite. The following system
calls are tested:
• chmod: changes permission
• chown: changes ownership
• link: creates hardlinks
• mkdir: creates directories
• mkfifo: creates fifo files
• open: opens a file
• rename: changes file name
• rmdir: removes directories
• symlinks: creates symbolic links
• truncate: decreases/increases file size
• unlink: removes regular files, symbolic links, fifos, and sockets
• xacl: reports errors when getting/setting ACLs

• Common functions:
‒ read
‒ write
‒ directory list
‒ rename
‒ create
‒ delete
• UTF-8 file names
• Time creation, modification, access, and attribute change
• Hardlinks
• Symbolic links, pipes, devices (optional feature)
• Extended attributes (optional feature)
• Ownership and permissions (optional feature)

Several filename namespaces: DOS, WIN32, and POSIX

Efficiently store very large, mostly empty files (read-only support)

Full support for reading compressed files

• Active superblock (MFT), file, directory, attribute and data caching.
Advanced algorithms and data structures ensure maximum I/O
throughput, low CPU usage for small and large files, and high IOPS for
file operations.
• Read/write performance is up to 50 times better compared to the
open-source NTFS-3G driver
• Tunable settings. Workload-specific optimizations
• Low power use, optimized for increased battery life
• Minimizes data fragmentation
• Efficient free-space management
• Support for data streaming with low power consumption
• Zero-copy, direct I/O support
• POSIX fallocate support

Rigorous quality assurance, wide deployment, and fault-tolerant design
guarantee outstanding file system robustness.

• Maintenance services are provided so that deployment and
development can be tailored through product answers to inquiries and
product updates.
• Microsoft NTFS by Tuxera can be custom-adapted to any software
environment

Proprietary, commercial

Support for backup/restore without decrypting

• Linux permissions supported (optional)
• Special access flags emulated (sticky, setuid, setgid)

Relies on a custom extended attribute

• NTFS attributes
• NTFS ACLs

• mkntfs: creates an NTFS file system
• ntfslabel: gets/sets NTFS label
• ntfsck: checks and repairs NTFS
• ntfsdebug: collect metadata/volume debug images