132Software Installation and User’s GuideICP RAID ConsoleNext, enter the appropriate drive size and press Enter (see Figure 10-82). ICPCON allowsyou to limit the hard disk size for this host drive. This becomes important when youconfigure disk arrays and you want to ensure that future drives added to the disk array fitin the array (for replacement purposes). Should a new drive have less than the requiredcapacity, ICPCON cannot accept it.Figure 10-82. Drive SizeIf you select two or more physical drives with the space bar and press Enter, ICPCONsuggests the creation of a logical drive of the type Chain. In some literature, disk chainingis also called Disk Spanning.Picture the functioning mechanism of a type Chain logical drive as follows: all hard disksforming the logical drive are linked together one by one in the exact same order in whichthey were selected with the space bar. This concatenation can be compared to a chain. If,for example, the logical drive consists of 4 hard disks with 2000MB each, the logical drivewill have a capacity of 8000MB. When data is written to this logical drive, the first harddisk is filled first, then the second, and so on.Although it is not advisable, logical drives of the type Chain can also be components ofarray drives.10.5.4 Configure Array DrivesThe Configure Array Drive menu option allows you to configure array drives (hierarchylevel 3). Array drives with the following listed RAID levels can be configured within thismenu.The ICP RAID controller can manage up to 35 array drives (with different RAID levels)simultaneously. Obviously, the number of hard disks will limit the number of parallelarrays that can be used.From the Advanced Setup menu, select the Configure Array Drives option and press Enterto display the Select Array Drive menu (Figure 10-83).Figure 10-83. Select Array DriveRAID 0 Pure Data Striping without RedundancyRAID 1 Disk MirroringRAID 4 Data Striping with Dedicated Parity DriveRAID 5 Data Striping with Striped ParityRAID 10 RAID 0 Combined with RAID 1
