硬件層次上生成的虛擬磁片(virtual disk) 統一稱為 LUN,不管是不是在Scsi環境下,雖然LUN最初只是SCSI體系下的一個概念.
而由軟體生成的虛擬磁片(virtual disk)統一稱為"卷volume", 比如各種卷管理軟體,軟raid等所生成的虛擬磁片.
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