A Disk Pool surfaces a single endpoint for all underlying disks that are added as storage targets. If you are familiar with on-premises storage appliances, you can consider Disk Pool as a SAN appliance and Azure Disks as the SSD drives that act as the storage units. You can expose a Disk Pool as an iSCSI target to enable data access to disks under the Disk Pool over iSCSI protocol. iSCSI stands for Internet Small Computer Systems Interface. iSCSI is a transport layer protocol that works on top of the Transport Control Protocol (TCP). It enables block-level SCSI data transport between the iSCSI initiator and the storage target over TCP/IP networks. Each disk pool can have one iSCSI target.