disk mirroring การใช้

• The most basic method is disk mirroring, typical for locally connected disks.
• XRC is a z / Series asynchronous disk mirroring technique which is effective over any distance.
• Storage Spaces have built-in resiliency from disk failures, which is achieved by either disk mirroring or parity across the physical disks.
• NetWare 2 . x implemented a number of features inspired by System Fault Tolerance ( SFT ) " features included standard read-after-write verification ( SFT-I ) with on-the-fly bad block re-mapping ( at the time, disks did not have that feature built in ) and software RAID1 ( disk mirroring, SFT-II ).
• :Smells like homework; however; disk mirroring is generally on a single machine ( setting aside remote mirroring provided by SAN clusters . ) failover is when you have a hot standby machine, with the master writing data to a shared drive ( NAS or SAN ) and is brought up after the master fails, load balancing is where two or more machines run at the same time and requests to them are split between machines ( with the machines synchronising between themselves if the requests actually change things ), high-availability clustering is a combination of load-balancing and failover ( where, because two or more machines are running at the same time there is no delay in failover as would happen with non-clustered failover, and data is synced between the machines if they don't share storage ).