Hard Disk

• A hard disk is a secondary and permanent data storage device.
• A hard disk consists of several circular platters and each platter has read/write heads on both the sides on it.
• ATA is a standard interface for connecting storage devices such as hard disks and CD-ROM drives.
• The ATA transfer data between the hard disk and the system using 16 bits with speeds of up to 100/133 MB per second.
• SATA is a high speed serial interface designed to replace ATA and Ultra ATA drive interface standards.
• ATA-4 introduces AT Attachment Packet Interface (ATAPI) which is capable of supporting data transfer rates of up to 33MBps.
• RAID combines two or more hard disks and treats it as a single drive.
• The hard disk interface specifies the method used by the hard disk to send and receive data to the system using a data cable.
• SCSI interface enables the hard disk to communicate with the system at very fast speeds.
• The IDE interface specifies that the hard disk controller is built on the hard disk.
• The EIDE interface supports a maximum of four hard disk drives on a system.
• Platters are round disks that are made up of metal or glass.
• The /Write head is used to read the data stored on the hard disk and also write the data to the hard disk.
• The temperature acclimation specifies the time that the hard disk must not be used after it is transported from a palace having a cold climate to a place having a warm climate.
•  The logic board contains the circuit for controlling the different hard disk.
• The file system determines the way that the files and folders are stored on the hard disk.
• FAT, NTFS and EXT are the different file systems.
• Partitioning is used to divide the hard disk into sections known as drives.
• The different type of partitions are primary partition, logical partition and extended partition.
• Formatting the hard disk creates the sectors, tracks and places the file system on the hard disk and prepares it so that the systems can store files on the hard disk.
• Troubleshooting the hard disk.