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Block access in SAN means, that VM (or hypervisor) have raw access to storage over network without any file system. It looks like raw local attached storage (DAS). Depending on SAN configuration the data blocks may be stored on: one physical disk (not used in enterprise SAN, but may be configured) hardware/software RAID array of disks on SAN device (most ...


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A pool of disks is called an array. With parity or mirroring mechanisms like RAID, an array can have more performance or durability than one disk alone. Connecting hosts to send block storage creates a storage network. Commonly Fibre Channel or Ethernet links to arrays. Allows the storage to be located in different hardware chassis from the compute. A LUN is ...


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