User manual LACIE 32TB 4X4BIG QUADRA BUNDLE

[. . . ] LaCie 4big Quadra · Design by Neil Poulton User Manual Table of Contents page 1 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Minimum System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Box Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Views of the Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] RAID 3 and RAID 3+Spare RAID 3 uses byte-level striping with a dedicated parity disk (Disk 4 in the illustrations, right) so that one volume mounts on the computer. If one physical disk fails, the data from the failed disk can be rebuilt onto a replacement disk. If a second disk fails before data can be rebuilt to a replacement drive, all data in the array will be lost. If a drive in the array fails, the data from the failed disk is automatically rebuilt to the empty or "spare" disk. RAID page 17 RAID 3 A1 A4 B1 B4 C1 C4 Disk 1 A2 A5 B2 B5 C2 C5 Disk 2 A3 A6 B3 B6 C3 C6 Disk 3 Ap(1-3) Ap(4-6) Bp(1-3) Bp(4-6) Cp(1-3) Cp(4-6) Disk 4 Applications RAID 3 provides good data safety for environments where long, sequential files are being read, such as video files. Disk failure does not result in a service interruption because data is read from parity blocks. RAID 3 is useful for people who need performance and constant access to their data, like video editors. RAID 3 is not recommended for intensive use with nonsequential files because random read performance is hampered by the dedicated parity disk In RAID 3+Spare disk failure does not require immediate attention because the system rebuilds itself using the hot spare, but the failed disk should be replaced as soon as possible. RAID 3+ Spare A1 A3 B1 B3 C1 C3 Disk 1 A2 A3 B2 B4 C2 C4 Disk 2 Ap(1-2) Ap(3-4) Bp(1-2) Bp(3-4) Cp(1-2) Cp(3-4) Disk 3 Spare Disk 4 LaCie 4big Quadra · Design by Neil Poulton User Manual 3. 1. 5. RAID 5 and RAID 5+Spare RAID 5 combines the striping of RAID 0 with data redundancy in an array with a minimum of three disks. Data is striped across all disks and a parity block (P) for each data block is written on the same stripe. If one physical disk fails, the data from the failed disk can be rebuilt onto a replacement disk. No data is lost in the case of a single disk failure, but if a second disk fails before data can be rebuilt to a replacement drive, all data in the array will be lost. If a drive in the array fails, the data from the failed disk is automatically rebuilt to the empty or "spare" disk. RAID page 18 RAID 5 A1 B1 C1 Dp Disk 1 A2 B2 Cp D1 Disk 2 A3 Bp C2 D2 Disk 3 Ap B3 C3 D3 Disk 4 Applications RAID 5 combines data safety with efficient use of disk space. Disk failure does not result in a service interruption because data is read from parity blocks. RAID 5 is useful for people who need performance and constant access to their data, like video editors. In RAID 5+Spare disk failure does not require immediate attention because the system rebuilds itself using the hot spare, but the failed disk should be replaced as soon as possible. RAID 5+Spare A1 B1 Cp D1 Disk 1 A2 Bp C1 D2 Disk 2 Ap B2 C2 Dp Disk 3 Spare Disk 4 LaCie 4big Quadra · Design by Neil Poulton User Manual RAID page 19 3. 2. Before you change the RAID mode of the LaCie 4big, familiarize yourself with the 4big's RAID modes. IMPORTANT INFO: Changing the RAID mode destroys data stored on the LaCie 4big. If you have saved data on the drives, back up data before following these steps. To change the RAID mode: 1. Unmount or safely remove the 4big Quadra volumes from your computer, disconnect the interface cable and switch off the 4big. To enter RAID modification mode, turn ON the 4big (do not select "AUTO") and simultaneously press the front LED on button for 15 seconds. Push the + or - buttons on the RAID mode selector until the desired RAID number appears. NOTE: 0=RAID 0, 1=RAID 10, 2=Concatenation, 3=RAID 3, 4=RAID 3+Spare, 5=RAID 5, 6=RAID 5+Spare, 7=N/A. [. . . ] Installing New Firmware LaCie may periodically offer firmware updates for the 4big. Visit LaCie's Web site, www. lacie. com, for the latest firmware update. For the procedure, please contact LaCie technical support. LaCie 4big Quadra · Design by Neil Poulton User Manual Contacting Customer Support page 35 5. If possible, make the drive the only external device on the CPU, and make sure that all of the cables are correctly and firmly attached. [. . . ]