Computer Storage

Computer Storage

1. secondary storage

   • secondary storage is the backing up of data
     • Backing up refers to the copying of files/data to a different medium eg. disk,tape,flash drive ect.
   • Backing up files on a regular basis is seen as a good computing practice
     • Eg. use of magnetic tapes or hard disk drives to back up clients' data on a regular basis.
       • backed up data is usually stored in a different place/medium to the main storage

2. Reasons for backing up data

   • ~ To safeguard against loss of data due to failure of the original secondary storage device, problems caused by files being overwritten accidentally or possible corruption of files eg. Power surges).
   • Hackers could Unintentionally damage important files and cause problems such as corruption or data loss

3. Types of access

   • File
   • Record
   • Feild
   • Serial access
     • Serial access is where data records are stored one after the other with no regard to the order
     • It is primarily used on magnetic tape systems and is essentially a very slow form of data