User manual AOPEN AK86L

[. . . ] NO. : AK86L-OL-E0308A 1 AK86-L / AK86-N What's in this manual TU Online Manual AK86-L / AK86-NU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 T TU What's in this manualU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 T TU You Must NoticeU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 T TU Before You StartU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The idea of RAID (Redundant Array of Independent Disks) was first introduced by David A. RAID is a purpose of storing the same data in different places on multiple hard diskH s and improves storage subsystem performance. The advantage of RAID is to provide better throughput H performance and/or data fault tolerance. Better performance is accomplished by sharing the workload in parallel among multiple physical hard drives. Fault-tolerance is achieved through data redundant operation where if one (or more) drive fails or has a sector failure, a mirrored copy of the data can be found on another drive(s). A RAID appears to the operating system to be a single logical hard disk. The RAID controller manages how the data is stored and accessed across the physical and logical arrays. The RAID controller help users to ensure that the operating system only sees the logical drives and users do not need to worry about managing the complicated schema. For optimal performance results, select identical hard drives to install in disk arrays. The drives' matched performance allows the array to function better as a single drive. Warning: The Serial ATA RAID function can be supported under Windows XP and Windows . Net environments. 64 AK86-L / AK86-N What a re t he RAID lev els ? Striping / Span (RAID 0) Online Manual RAID level 0, which is the fastest drive array you can have, is a performance-oriented disk mapping method. The data in this array gets written across a stripe or different disks for a faster transfer. Performance is better than a single drive since the workload is balanced between the array members. Identical drives are recommended for performance as well as data storage efficiency. The disk array data capacity is equal to the number of members times the smallest member capacity. For example, one 40GB and one 60GB drives will form an 80GB (40GBx2) disk array. Block 1 Block 1 Block 3 Block 2 Block 3 Block 5 Block 7 Striping Block 4 Block 5 Block 6 Block 7 Block 8 Logical Drive Block 2 Block 4 Block 6 Block 8 Physical Disks 65 AK86-L / AK86-N Mi r ro r in g ( R A ID 1) RAID level 1 uses at least two duplicate hard drives and store the exact same blocks of information between them. This is the slowest form of fault tolerance because the data has to be replicated onto two disks at the same time. If one of the mirrored drives suffers a mechanical failure or does not respond, the remaining drive will continue to serve and provide correct data. If one drive has a physical sector error, the mirrored drive will continue to function. Due to redundancy, the drive capacity of the array is half the total drive capacity. For example, two 40GB drives that have a combined capacity of 80GB would have 40GB of usable storage. With drives of different capacities, there may be unused capacity on the larger drive. RAID 1 increases cost as it takes twice as much hard drives to build our arrays. [. . . ] In most case, newer versions of drivers and BIOS have solved earlier bugs or compatibility problems. http://download. aopen. com. tw/downloadsU HU H 120 AK86-L / AK86-N Online Manual 5 6 7 eForum: AOpen eForum is provided to discuss our products with other users, in which your problem probably had been discussed before or will be answered. After log on, you may select your preferred language under "Multi-language". HU http://club. aopen. com. tw/forumU /U HU Contact Distributors/Resellers: We sell our products through resellers and integrators. They should know your system configuration very well and should be able to solve your problem efficiently and provide important reference for you. [. . . ]