Some programs are written directly on the host computer, running at the bottom level of the operating system. Using the concept of the Big Dipper, they virtualize the physical disks presented by the host's SCSI or IDE controller into …
For upper-layer write IO, there are two modes for RAID controllers: (1) WriteBack mode: When data arrives from the upper layer, the RAID controller saves it to the cache and immediately notifies the host IO is complete. This allows the host …
Understanding server raid cards Raid card: The full name is Redundant Array of Independent Disks Card. It uses Raid technology to turn multiple hard disks into one logical disk, with better capacity, performance, reliability, and …