User manual SEAGATE BLACKARMOR NAS 420

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[. . . ] BlackArmor® NAS 440/420 User Guide BlackArmor® NAS 440/420 User Guide © 2009 Seagate Technology LLC. Seagate, Seagate Technology, the Wave logo, and FreeAgent are trademarks or registered trademarks of Seagate Technology LLC, or one of its affiliates. All other trademarks or registered trademarks are the property of their respective owners. When referring to hard drive capacity, one gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one thousand billion bytes when referring to hard drive capacity. [. . . ] For instance, you could create three volumes to hold different types of information: · · Volume A: Business Files Volume B: Backup File Storage BlackArmor® NAS 440/420 User Guide (Version 2) 30 Managing BlackArmor Volumes, Shares and Storage · Volume C: Media Files You could then create one or more folders (shares) in each volume to suit your needs: · Volume A: Business Files · Share 1: Client Files · Share 2: Financial Files · Share 3: Human Resources Files · Volume B: Backup File Storage · Share 1: Daily Backups · Share 2: Month-end Backups · Volume C: Media Files · Share 1: Music Files · Share 2: Photo Files · Share 3: Video Files Working with Volumes By default, the available storage space in your BlackArmor server is configured into one volume that's protected by RAID 5. Understanding RAID RAID stands for Redundant Array of Independent Disks and is a technology that builds redundancy into your storage system to help keep your data safe from disk drive failures and other catastrophes. RAID comes in many levels, which vary according to the amount of protection they provide (and how they provide it), and the number of disk drives they support. By default, your BlackArmor server is preconfigured with RAID 5, which not only stores your data safely but also builds in redundant information called parity, which is data that's used to reconstruct your files if one of the disk drives in the server fails. You can choose to use a different level of RAID protection for your volumes--your BlackArmor server supports RAID levels 0, 1, 5, 10, and JBOD (which stands for Just a Bunch of Disks). However, RAID 5 is highly recommended as it provides the best level of protection available on your BlackArmor server. BlackArmor® NAS 440/420 User Guide (Version 2) 31 Managing BlackArmor Volumes, Shares and Storage This table explains the different levels of RAID supported by your BlackArmor server. Table 1: Supported RAID Levels for Volumes Number of Disk Drives Required 2­4 RAID Level of Volume RAID 0 (Also known as striping) Description A volume where data is distributed evenly (striped) across the disk drives in equal-sized sections. A striped volume does not maintain redundant data, and so offers no data protection. A volume where one disk drive is a mirror of the other (the same data is stored on each disk drive). A volume with RAID 5 uses data striping and parity data to provide redundancy. (Parity is extra information that's used to re-create data if a disk drive fails. In volumes with RAID 5, parity data is striped evenly across the disk drives with the stored data. ) A volume with RAID 10 is built from two or more equal-sized RAID 0 volumes. Data in a volume with RAID 10 is both striped and mirrored. A group of disk drives in a server, not protected by RAID. RAID 1 (Also known as mirroring) RAID 5 2 3­4 RAID 10 4 Span (Also known as a JBODa) 1­4 a. `Just a Bunch of Disks'. Seagate recommends that only users familiar and comfortable with RAID technology make changes to the server's RAID protection. Creating New Volumes As a BlackArmor administrator, you can create all the shares you want in the default volume, or you can create more volumes using BlackArmor Manager. When you create a volume, you can specify: · · · The size of the volume The disk drive(s) you want to use The level of RAID protection it should have (see page 31) You can use the same disk drives in multiple volumes providing there is available space on those drives. For instance, you could use half the space on disk drives 1, 2, and 3 to create Volume A, and the other half of the space on the same disk drives to create Volume B. To create a new volume, open BlackArmor Manager (see page 17). For more information on volumes, including deleting and modifying volumes, see the online Help. BlackArmor® NAS 440/420 User Guide (Version 2) 32 Managing BlackArmor Volumes, Shares and Storage Working with Shares Shares on the BlackArmor server can be either public (open to everyone, with some restrictions) or private (restricted to one user account only). As a BlackArmor administrator, you can create, modify, or delete shares at any time, as required. However, when you delete a share, you lose all the files stored in that share. Use caution when deleting shares from your BlackArmor server. Private Shares A private share is associated with one user account, and only BlackArmor users with permission can access that share. (As a BlackArmor administrator, you can turn a private share into a public share by modifying the share's settings in BlackArmor Manager. ) You can limit share access by: · · Granting access to specified BlackArmor users only. Limiting some BlackArmor users to read-only access. Read-only access means that a BlackArmor user can view files on the share, but can't edit those files or upload files to the share. [. . . ] Mirroring provides data protection, and striping improves performance. See also "mirror", and "stripe". remote access Access to the server from a computer that is not on your local network. For instance, accessing the server from a client's computer, over the Internet, is remote access. Remote access can also refer to shutting down or resetting the server using BlackArmor Manager instead of physically pressing the Power button. [. . . ]

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