From the course: Linux System Engineer: iSCSI Storage Area Networks
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iSCSI overview
From the course: Linux System Engineer: iSCSI Storage Area Networks
iSCSI overview
- [Instructor] iSCSI, or Internet Small Computer System Interface, is a storage area networking protocol that uses SCSI commands to share local storage over a network. The network is usually Ethernet, but it can be any IP network. The client uses a shared storage directly as a block device. There's difference from network file systems like CIFS or NFS where the shared storage appears as a file system. The client can use standard hard drive tools on the block device such as gdisk, parted, or LVM. The partitions or volumes are then formatted and mounted as if they were local block devices. iSCSI SANs are a cheaper alternative to expensive Fiber Channel SANs, which also use a SCSI command set but over Fiber Channel hardware which had dedicated cables, switches, and host controller adapters. Because iSCSI does not require any additional hardware, it can be deployed over existing networks. It uses port 3260 and TCP for transport by default. iSCSI is a cheaper and easier solution to adopt…
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