Which of the following correctly describes Direct Access and Sequential Access storage devices?

A.
Any point on a Direct Access Storage Device may be promptly reached, whereas every point in between the current position and the desired position of a Sequential Access Storage Device must be traversed in order to reach the desired position.

B.
RAIT is an example of a Direct Access Storage Device, while RAID is an example of a Sequential Access Storage Device.

C.
MAID is a Direct Access Storage Device, while RAID is an example of a Sequential Access Storage Device.

D.
As an example of Sequential Access Storage, tape drives are faster than Direct Access Storage Devices.

Explanation:
A: Direct Access Storage Device (DASD) is a general term for magnetic disk storage devices, which historically have been used in mainframe and minicomputer
(mid-range computer) environments. A redundant array of independent disks (RAID) is a type of DASD. The key distinction between Direct Access and Sequential
Access storage devices is that any point on a Direct Access Storage Device may be promptly reached, whereas every point in between the current position and
the desired position of a Sequential Access Storage Device must be traversed in order to reach the desired position. Tape drives are Sequential Access Storage
Devices. Tape storage is the lowest-cost option for very large amounts of data but is very slow compared to disk storage.
+ B is incorrect because RAIT stands for redundant array of independent tapes. RAIT uses tape drives, which are Sequential Access Storage Devices. In RAIT,
data are striped in parallel to multiple tape drives, with or without a redundant parity drive. This provides the high capacity at low cost typical of tape storage, with
higher than usual tape data transfer rates, and optional data integrity. RAID, or redundant array of independent disks, is a type of Direct Access Storage Device.
RAID combines several physical disks and aggregates them into logical arrays. When data is saved, the information is written across all drives. A RAID appears as
a single drive to applications and other devices.
+ C is incorrect because both MAID, a massive array of inactive disks, and RAID, a redundant array of independent disks, are examples of Direct Access Storage
Devices. Any point on these magnetic disk storage devices can be reached without traversing every point between the current and desired positions. This makes
Direct Access Storage Devices faster than Sequential Access Storage Devices.
+ D is incorrect because Sequential Access Storage Devices are slower than Direct Access Storage Devices. Tape drives are an example of Sequential Access
Storage Device technology.