DAS is storage that is directly connected to a server/workstation. This direct connection provides fast access to the data; however, storage is only accessible from that server/workstation. DAS includes the internally attached local disk drives or any other storage medium attached directly.

Data protection is a complex of measures that are used to protect data from being erased, damaged, or destroyed. 

The speed at which data is transmitted from one device to another. Data transfer rates are often measured in megabits per second (Mbps) or megabytes per second (MBps).

A dedicated device has only one function i.e. a backup server that has no other jobs other than to backup data.

A backup of all changes made after the last full backup. The advantage to this is the quicker recovery time, requiring only a full backup and the latest differential backup to restore the system. The disadvantage is that for each day elapsed since the last full backup, more data needs to be backed up.

This creates a direct link between your datacenter and the AWS backbone, so you’re not talking over a VPN or public internet. This is significantly faster than a VPN and more consistent — no more spikes at peak times.

Disaster recovery is the process used to restore your backed up data in the event of a disaster.

A round plate on which data can be stored. Disks are divided into two categories magnetic (floppy disks, hard disk drives) and Optical (CD-ROM, DVDS).

A machine that reads and writes data onto a disk. There are many different types of disk drives i.e. a hard disk drive that writes info to a hard drive or a Floppy drive which writes information to a floppy disk.

This is a variation of disk mirroring in which each of the multiple storage disks has its own SCSI controller. This is the practice of duplicating data in separate volumes on two hard disks to make storage more fault-tolerant in case one drive goes down you can still access the other.