User manual ZYXEL NSA-2400

[. . . ] NSA-2400 Network Storage Appliance User's Guide Version 1. 00 12/2006 Edition 2 www. zyxel. com About This User's Guide About This User's Guide Intended Audience This manual is intended for people who want to configure the Product Name [short] using the web configurator. You should have at least a basic knowledge of TCP/IP networking concepts and topology. Related Documentation · Quick Start Guide The Quick Start Guide is designed to help you get up and running right away. It contains information on setting up your network and configuring for Internet access. [. . . ] With two disks you could create: · up to two JBOD volumes · one RAID 0 or RAID 1 volume · Choose JBOD for flexibility and maximum usage of disk space for data. You can either add an additional disk to your one-disk JBOD volume (and so don't have to recreate shares, access rights etc. ) or create a different JBOD volume (and create new shares, access rights etc. ). · Choose RAID 0 if performance matters more than data security. RAID 0 has the fastest read and write performance but if one disk fails you lose all your data on the volume. It has fast performance as it can read and write to two disks simultaneously. Performance may matter more than data security to gamers for example. This method may also be acceptable for data that is already backed up somewhere else. · Choose RAID 1 if data security is more important than performance. Since RAID 1 mirrors data onto a second disk, you can recover all data even if one disk fails, but the performance is slower than RAID 0. 7. 3. 1. 3 Three Disks Choose a combination of JBOD and/or RAID 0 or RAID 1 for the reasons already outlined. With three disks you could create: · up to three JBOD volumes · one JBOD volume and one RAID 0 or RAID 1 volume 7. 3. 1. 4 Four Disks In addition to the JBOD, RAID 0 and RAID 1 choices, you may choose RAID 10, RAID 5 or RAID5_SPARE. With four disks you could create: · · · · · up to four JBOD volumes one or two JBOD volumes and one RAID 0 or RAID 1 volume two RAID 0 volumes or two RAID 1 volumes one RAID 0 volume and one RAID 1 volume one volume using one of RAID 10, RAID 5 or RAID5_SPARE · Choose RAID 10 for maximum data security but with just 50% of the available space for your data. You can recover all data even if two disks (not in the same RAID 1 array) fail. If two disks in the same RAID 1 array fail, then all data in the volume is lost. If two disks in different RAID 1 arrays fail, then you effectively have a RAID 0 configuration. NSA-2400 User's Guide 98 Chapter 7 Storage Screens · Choose RAID 5 if you need more disk space available for data and if up to one disk failure is acceptable. RAID 5 uses 75% of the available space for your data. All data can be recovered if one disk fails. If two disks fail then, all data in the volume is lost. If one disk fails, the volume is degraded and will perform more slowly than a healthy volume. You should shut down the NSA, replace the faulty disk and then resynchronize the volume to attain previous performance. · Choose RAID5_SPARE if you need the volume to recover as soon as possible in the event of a disk failure. RAID5_SPARE operates as a RAID 5 with three disks while the fourth disk is on standby. [. . . ] However, there is no guarantee that interference will not occur in a particular installation. Notices Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NSA-2400 User's Guide 191 Appendix E Legal Information This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada. Viewing Certifications 1 Go to http://www. zyxel. com. [. . . ]