Linux I am aware of

sysfs  is a virtual file system that represents kernel objects as directories, files and symbolic links.  sysfs can be used to query for information about kernel objects, and can also manipulate those objects through the use of normal file system commands. The  sysfs  virtual file system has a line in  /etc/fstab , and is mounted under  /sys .

What is RAID? RAID  stands for  Redundant Array of Inexpensive Disks  which was later interpreted to  Redundant Array of Independent Disks . This technology is now used in almost all the IT organizations looking for data redundancy and better performance. It combines multiple available disks into 1 or more logical  drive  and gives you the ability to survive one or more drive failures depending upon the RAID level used . Why to use RAID? With the increasing demand in the storage and data world wide the prime concern for the organization is moving towards the security of their data. Now when I use the term security, here it does not means security from vulnerable attacks rather than from hard disk failures and any such relevant accidents which can lead to destruction of data. Now at those scenarios RAID plays it magic by giving you redundancy and an opportunity to get back all your data within a glimpse of time. Levels Now with the moving generation and introduction of new