Difference new spanned volume and new striped volume

In storage virtualization, both new spanned volume and new striped volume are techniques used to combine multiple physical disks into a single logical volume. The main difference between the two is the way the data is written and read from the disks.

New Spanned Volume (RAID 0)

A new spanned volume, also known as RAID 0, is a type of disk striping where data is written across multiple disks in a sequential manner. Each disk is treated as a single unit, and data is written to each disk in a continuous sequence. This means that each disk contains a portion of the entire dataset.

Here are the key characteristics of a new spanned volume:

• Data is written sequentially across multiple disks.
• Each disk contains a portion of the entire dataset.
• No redundancy is provided, so if one disk fails, the entire volume is lost.
• Read and write performance is improved, as multiple disks can be accessed simultaneously.

New Striped Volume (RAID 5)

A new striped volume, also known as RAID 5, is a type of disk striping with parity. In addition to striping the data across multiple disks, RAID 5 also writes parity information to each disk. Parity is a mathematical calculation that allows the system to recover data in case of a disk failure.

Here are the key characteristics of a new striped volume:

• Data is written in stripes across multiple disks, with each stripe containing a portion of the data and a portion of the parity information.
• Each disk contains a portion of the data and a portion of the parity information.
• If one disk fails, the system can recover the data using the parity information from the other disks.
• Read and write performance is improved, as multiple disks can be accessed simultaneously.
• Provides redundancy, so data is protected against single disk failures.

In summary:

• New spanned volume (RAID 0) is a simple disk striping technique that provides improved read and write performance but no redundancy.
• New striped volume (RAID 5) is a more advanced technique that provides both improved performance and redundancy, making it a more reliable option for storing critical data.

When deciding between the two, consider the following factors:

• Data importance: If the data is critical and cannot be lost in case of a disk failure, RAID 5 (new striped volume) is a better choice.
• Performance requirements: If high read and write performance is required, RAID 0 (new spanned volume) may be a better option.
• Disk failure tolerance: If you can tolerate some data loss in case of a disk failure, RAID 0 (new spanned volume) may be acceptable. However, if you need to ensure data integrity, RAID 5 (new striped volume) is a better choice.