Data Recovery for NWFS (Netware Traditional File System):File System for Novell

NetWare provides the traditional NetWare file system components and utilities, such as NetWare partitions, NetWare volumes, and file management utilities. The NetWare file system provides many benefits for making information available on a network.

Centralized management of data and backups.
Improved security
Improved reliability and fault tolerance
Shared and private storage areas
Access to data by many different operating system platforms

NWFS Volume

The volume is the highest level in the NetWare file system. It is a logical entity that consists of a fixed amount of physical space on one or more hard disks.

A NetWare server is divided into one or more volumes. The first network volume is named SYS: and is created during NetWare installation. Using NWCONFIG, you can create a new volume on any hard disk that has a NetWare partition. A NetWare server supports up to 64 volumes.

NetWare volumes are subdivided in two ways:

Physically: Volumes are divided into volume segments; different segments of a volume can be stored on one or more hard disks.
Logically: Volumes are divided into directories containing files or subdirectories by network supervisors and users who have the appropriate rights.

The file system is analogous to an office filing system, as illustrated in the following figure.

Directories appear at the volume level. Storing files at this level is possible, but not recommended for security reasons because granting rights to files at the root of the volume would necessitate granting rights to the entire volume.

Volume Segments

A volume segment is a physical division of a volume. Different segments of a volume can be stored on one or more hard disks, allowing you to create large volumes.

A single hard disk can contain up to eight volume segments belonging to one or more volumes, and each volume can span up to 32 segments.
By placing segments of the same volume on multiple hard disks, different parts of the same volume can be read from or written to simultaneously, speeding up disk input and output.

However, when you spread segments of a volume over several disks, you should protect the volumes against disk failure by mirroring; otherwise, if a single disk fails, one or more entire volumes shut down.

A volume's size can be increased by adding another hard disk to the NetWare server, by setting up a NetWare partition on the disk, or by adding a new NetWare partition to the existing volume as one or more new volume segments.

Recovering Deleted Files

One of the most user-friendly features of NetWare is in recovering accidentally deleted files and data recovery. Every computer users has deleted a file and then wished that they could get it back.
NetWare keeps all of your deleted files available for recovery until one of the following events occurs:

A network supervisor runs a purge command for the entire volume.
The user runs a purge command for their own directories where they have erase rights. The purging occurs according to the file’s ownership.
The file server has run out of disk space, upon which the server will purge the oldest deleted file each time the server runs out of space. Your network supervisor has established the amount of time that must elapse before the server is allowed to automatically purge old, deleted files.

In the above circumstances, you need professional data recovery company services in order to recover your lost data.

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