Yotta RAID Software installation guide - Axus

Software Operation ManualHot SwapThe substitution of a (usually defective) unit by a replacement that takes place while the systemis online.Logical UnitDisk storage space on one or more physical drives that appears to the host computer as asingle drive.LUN (Logical unit number)The number assigned to a logical unit. Slices of a RAID are assigned (mapped to) LUNs bywhich they appear to the host computer.MirroringSee Disk Mirroring.ParityParity information is redundancy information calculated from actual data values. If any singlepiece of data is lost, the data remaining and the parity information can be used together tocompute the lost data. Parity information can either be stored on a separate, dedicated drive, orbe mixed with the data across all the drives in the array.RAID (Redundant Array of Independent / Inexpensive Disks)A disk array in which part of the storage capacity is used to store redundant information aboutuser data stored on the remainder of the storage capacity. The redundant information enablesregeneration of user data in the event that one of the array member disks or the access path toit fails. See Parity. All RAID levels offer different data throughput speeds and fault tolerance(data redundancy). RAID 0 does not feature redundant information but is nonethelessconsidered a special type of RAID.SCSISmall Computer System Interface.SliceA partition of an array. See LUN.StripingSee Disk Striping.- 101 -