What happens to the data on a RAID1 volume when Disk 2 fails?

When a disk in a RAID 1 configuration fails, the data remains accessible because RAID 1 is designed for redundancy. In RAID 1, data is mirrored across two or more disks. This means that each disk contains an exact copy of the data. When one disk fails, the other disk still retains a complete, intact copy of the information. This allows users to continue accessing their data without interruption or loss.

In the case of a disk failure in RAID 1, system administrators can replace the failed disk, and the RAID controller will rebuild the array by copying the data from the surviving disk onto the new disk to restore redundancy. This self-repair nature of RAID 1 not only ensures data availability even during a hardware failure but also minimizes downtime for the system.

The other options do not align with how RAID 1 operates. Data loss would only occur if both disks failed, while RAID 1 cannot convert itself into RAID 0, which is a different configuration focused on performance rather than redundancy. Also, if one disk in a RAID 1 setup fails, the data on the remaining functional disk remains accessible; hence, both disks not being accessible is inaccurate.