Hi. Thank you for your question and reaching out. I’d be more than happy to help you with your query.
For your FIRST QUESTION:
A virtual disk in a storage context refers to a disk-like abstraction that provides access to a file or a portion of a physical storage device, but presents it to the operating system as a separate disk or volume. In the context of a storage layout, the virtual disk is created to provide a logical representation of the physical storage and allows for data to be stored in a specific manner, such as Simple, Mirror, or Parity.
A volume in the context of storage refers to a logically-defined portion of a disk, separate from the rest of the disk, which can be formatted with a file system and assigned a drive letter or mount point. In the context of the virtual disk, a volume is created on top of the virtual disk to provide a specific area for data storage, which is then managed and accessed by the operating system as a separate entity.
The creation of a column in this context likely refers to the creation of a data column in the storage layout, such as a data strip or parity block, which is used to store data in the chosen layout (Simple, Mirror, or Parity). The exact details of how this works in the background will depend on the specific storage technology and implementation being used.
For your SECOND QUESTION:
Yes, that is correct. In a two-way mirror configuration, if one disk fails, the data is still available from the other disk, which acts as a mirror. However, with an increase in the number of disks, the chances of multiple disk failures also increase. As a result, the number of simultaneous disk failures that can be tolerated by the system also increases.
In your case, with 11 disks, the number of disk failures that can be tolerated in a two-way mirror configuration would be 2. This means that if 2 disks fail, the data may become inaccessible, and the system may experience data loss.
In a three-way mirror configuration, if one disk fails, the data is still available from the other two disks, which act as mirrors. With 11 disks, the number of simultaneous disk failures that can be tolerated in a three-way mirror configuration would be 3, which provides a higher level of redundancy and reduces the risk of data loss.
If the reply was helpful, please don’t forget to upvote or accept as answer, thank you.