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File System Drivers Technology

UFSD - Universal File System Driver

UFSD (Universal File System Drivers) is a unique technology specially developed by Paragon Software to provide full access (read/write, format, etc.) to volumes of the popular file systems (NTFS, FAT, Ext2/3Fs etc.) under various platforms (DOS, Windows, Linux, etc.) when these file systems are not supported.

General Features

File Systems	NTFS, FAT, Ext2/3FS, Unix SCO
Cross platforms	Dos, Windows and Linux
Modern and non-standard hardware	64bit, SMP, MIPS, Big-Endian, etc
Big Volumes	Up to 2 Terabytes
Huge Files	Up to 64Gb
Great Performance	Higher/Commensurable with native Ext2FS
Extremely Low Memory Requirements	~400k of RAM
Free licensing	No reverse-engineering or borrowed software

Approaches Overview

Paragon File System Products

Mount Everything
Ext2FS Anywhere
NTFS for Linux
Recovery CD

Best Practice

NAS Linux based Solution
Backup/Restore Solution
Antivirus Solution
Data Recovery Solution
Real-Time Multimedia Solution

Developers Product

UFSD SDK

OEM/ODM special feature design

Hardware Customizing (MIPS, Big-endian, etc)
Linux-swap on NTFS volume
UNIX SCO under Windows
cpntfs Utility - NTFS Attributes Support
Check Disk Utility
Format Utility
NAS Samba Shared Access

NTFS for Linux

NTFS driver

Build-in Bootable CD
RPM Customizing
Default/Basic attributes
Short/Long File Names
Unicode/All Languages

LDM driver
Specially developed for Dell to access Microsoft Software Raids and Dynamic Volumes:

Spanned
Mirrored
Striped
RAID-5

mkntfs - format utility
- Formats the partition to NTFS
chkntfs - check utility
- Checks the integrity of the NTFS volumes
infntfs - info utility
- Shows the info about NTFS volumes
cpntfs - copy utility
- supporting NTFS attributes:

Compression
Sparse Files
Security
Advanced Streams
Hard links
Quotes

NAS Linux based solution

Problem
It was necessary to grant access of the client computers (Windows based mostly) to NTFS partition over network via Samba shared access. External hard disk with NTFS partition was attached through the USB port to the Linux operated tiny file server based on Big-Endian architecture with only 32 MB of RAM. The file server worked under Linux loaded from ROM without system HDD

New features:
Support of Big-Endian architecture

Minimal memory requirements <256Kb of resident memory
Linux support without hard disk (booted from tiny server ROM)
Possibility to use NTFS partition as a Linux Swap-file
Support of huge NTFS partitions (up to 2 TB)
Considerable increase in the driver performance up to (5Mb/Sec for NSLU2)
Support of multi-thread access mode (scores of clients and thousands of files)
High level of reliability (weeks of heavy tests)

Data Recovery Solution

Traditionally all Paragon products related to hard disk operations have similar Linux versions based on Paragon Bootable CD. These CDs have different configuration depending on purpose of the product. But there is one common thing peculiar to all of them - it is pre-installed NTFS for Linux driver. Paragon Rescue Kit also includes LDM (Linux Dynamic Module) driver, which guarantees access to MS Dynamic Disks. The main purpose of this feature is to get access to NTFS partition on a PC with non-operable OS by booting from such a rescue CD.

Solution
Here we would only touch upon one of the possible applications (for example Recover) of the Paragon Rescue Kit, that is the ability to boot Linux and mount NTFS partition, including all types of dynamic volumes, in case of the system malfunction. You can rescue important data, which can be written onto removable media or a network share.

Results
We obtained a portable last resort solution - by using such a CD you will be able to access data on NTFS (all versions) partitions and any types of dynamic volumes:

Spanned
Mirrored
Striped
RAID-5

Backup/Restore Solution

CPNTFS ( Paragon NTFS for Linux Copy Utility) was designed to provide the files/directories NTFS Save/Restore operations supporting extended NTFS attributes:

storing NTFS files and folders including its attributes as an attached structure
restoring previously saved files and folders to the NTFS partition proving full or partial recovery of the attributes with corresponding Meta Files correction

Supported Extended NTFS Attributes/Features:

Security
Encryption
Compression
Advanced Streams
Hard Links
Sparse Files

Work Scenarios:

Whole NTFS Volume Backup/Restore
Partial Backup/Restore - update the existing original NTFS volume
Inherited Copy Back Mode - attributes are inherited from source or destination optionally for none original destination volume.

Antivirus Knoppix Bootable CD for NTFS

Problem
scanning for viruses NTFS partitions by using the Knoppix LiveCD

Solution

Integrating the NTFS for Linux driver onto bootable CD based on Knoppix.
Implementing support of the alternate data streams for NTFS partitions.

NTFS 4 Knoppix
The major part of the task was easy to accomplish because by that time we had already developed our own Linux Bootable Recovery CD with pre-installed NTFS for Linux driver. It was just another Linux distribution to be added into our assets.

NTFS Streams Support
Till that moment our driver had no support of NTFS streams. So it was updated to support this NTFS feature.

Results
The customer obtained useful, reliable and portable check/repair solution - bootable CD based on Knoppix. It provided the ability to boot from this special CD, check for viruses and repair NTFS partitions without booting the Windows OS that could be infected. The data streams from NTFS located files could additionally be read and checked for viruses. NTFS for Linux driver obtained a new functionality- NTFS streams.

Real-Time Multimedia Solution

Problems:

Support of huge files (tens of GB)
Guarantee an acceptable level of performance enough for real time processing

Huge NTFS Files
Till that moment we hadn't tested the driver with files larger than 4 GB. As a result of our work we achieved support of practically unlimited file size - up to 64 GB. After that we made all necessary configurations for the driver and some of the Linux kernels.

Performance Issue
The second task, which was being investigated at the same time, was to estimate the performance level for our driver. Despite the limited amount of RAM on the technological Linux station (256 MB) and hard average workload of the system because of the customer's multimedia software, the driver showed an acceptable performance level for such a purpose. We had no need to apply to various tricks except several configuration adjustments. However we already had had several solutions of increasing the performance level of the driver in case it was required.

Results

An opportunity to access files with practically unlimited size (up to 64 GB)
Acceptable productivity level of the driver quite enough for processing video streams simultaneously in a real time mode.

CONTACTS

You are welcome to contact us with your project ideas, questions, suggestions or additional information requests directly at: volume@paragon-software.com