Datoptic RM16_EX8 User Manual
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42 RM16_EX8 User Guide v1.0 ‐ DATOptic.comso it can be used by the operating system without creating a new operating systempartition.You can use the Diskpart.exe command line utility, included with Windows Server 2003 orthe Windows 2000 Resource Kit, to extend an existing partition into free space in thedynamic disk.Third-party software vendors have created utilities that can be used to repartition diskswithout data loss. Most of these utilities work offline. Partition Magic is one such utility.High availability• Global Hot SparesA global hot spare is an unused online available drive, which is ready for replacing thefailure disk. The global hot spare is one of the most important features that SATA RAIDcontrollers provide to deliver a high degree of fault-tolerance. A global hot spare is a sparephysical drive that has been marked as a global hot spare and therefore is not a member ofany RAID set. If a disk drive used in a volume set fails, then the global hot spare willautomatically take its place and the data previously located on the failed drive isreconstructed on the global hot spare.For this feature to work properly, the global hot spare must have at least the same capacityas the drive it replaces. Global hot spares only work with RAID level 1, 10, 3, 5, or 6 volumeset. You can configure up to three global hot spares with ARC-11xx/12xx. The “Create HotSpare” option gives you the ability to define a global hot spare disk drive. To effectively usethe global hot spare feature, you must always maintain at least one drive that is marked asa global spare.Important : The hot spare must have at least the same capacity as the drive it replaces.• Hot-Swap Disk Drive SupportThe SATA controller chip includes a protection circuit that supports the replacement of SATAhard disk drives without having to shut down or reboot the system. A removable hard drivetray can deliver “hot swappable” fault-tolerant RAID solutions at prices much less than thecost of conventional SCSI hard disk RAID controllers. This feature provides advanced faulttolerant RAID protection and “online” drive replacement.• Auto Declare Hot-SpareIf a disk drive is brought online into a system operating in degraded mode, The SATA RAIDcontrollers will automatically declare the new disk as a spare and begin rebuilding thedegraded volume. The auto declare hot-spare function requires that the smallest drivecontained within the volume set in which the failure occurred.In the normal status, the newly installed drive will be reconfigured an online free disk. But,the newly-installed drive is automatically assigned as a hot spare if any hot spare disk wasused to rebuild and without new installed drive replaced it. In this condition, the autodeclare hot-spare status will be disappeared if the RAID subsystem has since poweredoff/on.The Hot-Swap function can be used to rebuild disk drives in arrays with data redundancysuch as RAID level 1, 10, 3, 5, and 6. |
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