The Mechanism
Because RAID 60 arrays are typically deployed for business-critical applications, any drive failure generates intense pressure on IT personnel. Human errors during physical maintenance are a leading cause of multi-drive dropouts.
The Impact on RAID 60
- Accidental Double-Pulling: If Sub-Array 1 is already running in a degraded state with two failed drives, it cannot afford to lose another. If an administrator misreads a drive slot label or a blinking LED indicator and accidentally pulls a healthy drive from that same sub-array, they immediately trigger a third failure, collapsing the volume.
- Forcing "Stale" Disks Online: If a drive drops offline due to a loose SAS cable, it immediately stops receiving data. If an administrator resolves the cable issue hours later and uses the controller utility to manually force that drive back "Online" without initiating a proper rebuild, the controller will read outdated data. This scrambles the parity calculations and breaks the file system.
