Lesson Summary

■ RAID 0 (disk striping without parity) requires a minimum of two disks, and all data is lost if a disk in the set fails. It provides better performance than a simple volume.

■ RAID 1 (disk mirroring) uses two disks and provides no performance improvement, but no data is lost if one disk fails.

■ RAID 5 (disk striping with parity), which requires a minimum of three disks, provides better performance than a simple volume, and data is not lost if one disk in the set fails.

■ A logical unit number (LUN) is a logical reference to a portion of a storage subsystem. A LUN can represent a disk, a section of a disk, an entire disk array, or a section of a disk array in the storage subsystem.

■ Servers and clusters connect to Fibre Channel arrays using host bus adapter (HBA) ports. Servers and clusters use iSCSI initiators to connect to iSCSI targets, which manage iSCSI arrays.

■ Storage Manager for SANs creates and manages LUNs on iSCSI and Fibre Channel devices. Storage Explorer manages iSCSI and Fibre Channel fabrics.

Was this article helpful?

0 0

Post a comment