Adaptec 2074700-R User Guide - Page 182
Add Hot Fix
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ICP RAID Navigator loss. Some expansions take a long time, so it is advisable that there be a minimal amount of traffic on the system. 11.5.15 Add Hot Fix Click the right mouse button on the array drive icon. Use this option to add a hot fix drive to an array drive (RAID 1/4/5/10). Add a private hot fix drive or a pool hot fix drive. Private hot fix drives are assigned to a specific array drive and are activated if a member of this array drive fails. Pool hot fix drives can be used by any array drive with pool hot fix access enabled. RAID 1 array drives allow only pool hot fix drives. After choosing the type of hot fix drive, you can select a physical drive from the box that shows all suitable drives. Figure 11-144. Add Hot Fix Drive The capacity of the hot fix drive has to be larger or equal than the capacity of the components of the array drive. For example: The logical drives of the array drive have 4.2GB capacity, thus the capacity of the hot fix drive has to be 4.2GB or larger. The spindle motor of the hot fix drive is normally stopped (for example, when the hot fix drive is not needed). Thus, it may take a few seconds to get a response when you click on that drive. Some general notes on hot fix drives. One of the reasons RAID array drives are used, lies with the data redundancy they provide, that is, the data security you have in the event of a hard disk failure. For the purpose of the following considerations, we define the term time without redundancy (TWR) as the time it takes to replace a failed hard drive (assuming there is no hot fix drive installed in the system). The time without redundancy should be kept as short as possible, not including the time needed to set up the array drive (state build). Let us assume that one of the hard disks of a RAID 5 array drive fails. The array drive is without redundancy. TWR begins. Any superfluous prolongation of the TWR (because you have to get a replacement hard disk or because no one checked the file server) increases the risk of data loss should a second hard disk fail. Therefore, new redundancy should be created as soon as possible and in an entirely automated manner. Integrate a hot fix drive as an immediately available and auto-replacing hard disk to keep the TWR as short as possible. Only a hot fix drive can ensure optimal array drive security and constant 182 Software Installation and User's Guide