Resolving OLT Corruption in UNIX Operating System
Superblock in UNIX operating system contains important information about the file system like file system type, vital numbers describing this file system’s geometry, behavioral tuning parameters, disk layout version number and more. The OLT (Object Location Table), which is referenced from the superblock, is primarily used to at the time of mounting the file system. The information saved in OLT is used to locate the file system structures that are not in fixed locations. Corruption or damage to OLT mainly occurs due to file system damage, unexpected system shutdown, malicious software like virus and more. Two outcomes that you encounter after OLT has been damaged are unbootable hard drive and data inaccessibility. To overcome such situations, you need to restore the data from an up-to-date backup. However, if no backup is available or backup falls short to recover the required data, you need to opt for advanced UnixWare data Recovery tool.
Consider a practical scenario, where you encounter the below error message after the OLT gets corrupted or damaged:
“#fsck -F vxfs -o full /dev/vg08/ftpresfs
vxfs fsck: OLT extent 0 has bad magic
read of primary OLT failed
vxfs fsck: OLT extent 1 has bad magic
read of OLT copy failed
vxfs fsck: no valid OLT, cannot continue
file system check failure, aborting ...”
Data stored in the hard drive becomes inaccessible after you encounter the above error message. In addition, you encounter the same error message each time you attempt to mount your system.
To resolve the above error message and access the data, you need to reinstall the file system. These file systems act as pointers to the files and folders saved on the hard drive. Reinstalling the file system will erase all those entries and your data will become inaccessible. In such circumstances, you need to opt for powerful UnixWare Recovery application.
Such UnixWare Data Recovery tools employ high end scanning methods to recover and restore the lost data. Built with highly graphical and interactive user interface, these applications are easy to understand without prior technical understanding. These applications also recover lost data from corrupt super block file recovery after damage in Inode structures. Such recovery applications also recover the data after FSCK is unable to repair the system data structures.
Stellar Phoenix (SCO UnixWare) Data Recovery is trust-worthy UnixWare Data Recovery application. It supports VxFS [Veritas File System - VxFS1, VxFS2 & VxFS4] and UFS File systems. It gets installed on Windows (XP, 2003, 2000, NT, ME, 98 and 95) and the affected SCO hard drive should be connected as slave.
About the Author:Andrew Watson a student of Mass Communication doing research on data recovery services. He is also a freelancer for http://www.datarecoveryservices.biz/
Article Source: ArticlesBase.com - Resolving OLT Corruption in UNIX Operating System