Data recovery from UNIX server considers SCO-UNIX as the main platform, though there are many other versions of it like AT&T, Berkeley and others. Main type of hard disk types supported by the recovery tools are UFS and VXFS. Ever since Linux took over the open source operating system, UNIX has been seen only in older organizations that have been hanging onto this legacy OS for many decades. But it is still considered as one of the most powerful operating systems as a server with centralized hard disk and thin clients. Earlier versions of UNIX had only virtual clients with no CPU and HDD of their own. If you have a keyboard and a monitor you can easily get connected to the SCO UNIX server with a virtual ID allocated to your node. Today it is possible to have Window, Linux, Solaris, Mac and other intelligent clients to UNIX server.
Today UNIX servers work in enterprise companies just like the IBM main servers. You may try to install the SCO Unix-ware on windows platform and get its benefits as a sturdy OS. Our support for Unix-ware is made of of files and folder recovery services, logical volume search and performs SCO-based files and folders recovery.
There are two main companies which offer hardware and software based support for UNIX-ware systems on windows platforms, namely Stellar-Phoenix and VXFS. Stellar offers many basic and advanced features for file search, selective file restoration and folders, logical volume recovery and support for multiple types of files that are available on windows based UNIX-ware. VXFS offers multiple options for deleted files and folders file filters, file masks, and file searches and saving recovered files.
Data loss scenarios
SCO open server supports HTFS and EAFS formats. The data structure is one of the critical parameters for the efficient working of the OS. Data corruption or loss can occur due to volume corruption, super-blocks, loss of connectivity with INODE, damaged HDD read-write-head, cylinder and platter damages, PCB issues etc.
Main board for hardware diagnosis and repair: – SCO UNIX server based HDD can be rectified for mechanical and electrical damages with the help of enterprise hardware diagnosis and repair units. The data recovery hard kit will also have other components like the UDMA hardware component. They are normally 3-port tester boards which can be inserted into the PCI-expansion slots of the main board. They work with 2 Serial ATA ports and have a data transfer speed of 100MBPS. When you have installed them onto the main controller board, it is possible to connect two disk drives simultaneously with the board through Serial ATA port-0 and serial ATA port-1.
Platter assembly unit: – This is s twin chamber utility where you can place the defective platters from the failed disk as well as the working condition platters which act as donors. The interface between them is provided with the help of a connector that is in turn controlled by a port from the User interface. OEM software tools installed in the interface will be able to monitor and control the disk imaging speed between the platters.
Head replacement Unit: – This is a sophisticated piece of equipment which is used individually to replace the read-write head components of the HDD without having to remove the Actuator arm assembly from the drive. You will be able to place the HDD on the work bench and open the case, while fixing the devices main part with the actuator arm assembly. The tool lifts the read-write assembly slightly above the platters and performs the replacement operation.
Spindle motor reset unit: – This is an independent unit based on the circular disk that fits into the main work bench of the hardware controller board. The probing knob at the top can be fitted into the HDD spindle motor and turned in the anti-clockwise direction for freeing the stuck head of the spindle motor.
PCB donor kit: – This is an additional tool kit for replacing the PCB ROM firmware content when it gets burnt out. The other options with this tool are replacement of board and chip level components of the PCB. This tool provides compatible donor PCB from which the working condition compatible components are taken out for replacing the defective components in the failed HDD PCB. Data recovery experts will be able to utilize the components to give you the best and safest data salvaging results within the minimum possible time.
There are three stages through which SCO UNIX kernel can be restored back into working conditions. The first stage starts with the complete scanning of media for logical bugs. This step needs to be taken only after ensuring all the physical damages to disk and PCB have been set right. In the next stage a search algorithm is initiated for scanning through the directory-tree to locate all the deleted files and folders. This scan probes though sub directories and interleaves.
Kernel recovery happens through restoration of deleted files and folders with the undelete utility. Once the files are recovered they get restored to a safe location.
Since the SCO UNIX server considers all the devices as file systems, recognition of device failures is said to be easy in this platform. However, file system corrections take long time and complications are said to be more in case of abrupt power failure when the SCO server is running.
If you are planning to run SCO UNIX server in your computer, you should make sure that it is supported by an uninterrupted power supply source. It is suggested that you don’t try to perform any DIY operations for file and folder recovery when the disk drive gets corrupt or damaged, since the technicality involved in data recovery are more complex than the Linux server OS. Once the files and folders have been recovered by the technician, you immediately take a backup into an external drive. Always make it a point to perform a proper shutdown of the server before powering off the computer.