User manual LACIE STORVIEW STORAGE MANAGEMENT SOFTWARE

[. . . ] LaCie StorView Storage Management Software User Manual Table of Contents page 1 Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inter-Server Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Although there is a level of protection during this operation without the backup, the best insurance is a valid backup. NOTE: After the array expansion process has completed, if you are expanding for the purposes of new drive space you will need to create the appropriate logical drive(s) and define them in your operating system. However, if the expansion is intended to increase the existing logical drive capacity you will need to perform a LUN Expansion. Afterwards a third-party volume/partition software product will be necessary to manipulate any existing partitions. On the Main screen locate and click on the <Array_Name> you wish to expand. From the Array Information window, click the EXPAND ARRAY tab, see Fig. Following the sequenced steps, click the Array Expansion Type pull-down menu, choose the type of expansion applicable to your array. Verify the changes you are about to make by examining the "Before Expansion" and "After Expansion" analysis. continued on the next page >> LaCie StorView Storage Management Software User Manual Managing the Storage Solution page 72 7. You will receive a screen prompt that the command was successful, click the CLOSE button. If the command was unsuccessful, review the settings for incorrect parameters and hardware for operational status. Once the expansion progress has reached 1% complete, you may resume normal host I/O operations. 8. 2. 7. Trust an Array Fig. 84 - Expand Array Tab Selected When you create an array, you have the option to trust the array. This option should only be used in environments where the user fully understands the consequences of the function. The trust array option is provided to allow immediate access to an array for testing application purposes only. A trusted array does not calculate parity across all drives and therefore there is no known state on the drives. As data is received from the host parity is calculated as normal, but it occurs on a block basis. There is no way to guarantee that parity has been calculated across the entire drive. The parity data will be inconsistent and so a drive failure within a trusted array will cause data loss. The Create Array window will appear, select your drives in the Available Drives section. At Item 7, use the pull-down menu and select "Trust Array. " 7. Choose the "Back-off Percent" (reserved capacity) for the drives. 85 - Expand Array Confirmation continued on the next page >> Fig. [. . . ] The purpose of a snapshot is to generate a point-in-time reference marker that allows a system administrator restoration of a logical drive data to the state it was at the time the snapshot was taken. Due to disk data caching, it is required to keep track of the status of the various caches present in the server installation environment. A server might believe a block of data has been committed to the disk when it is actually kept waiting in the RAID Controller cache. Likewise, an application such as a database might believe its data has been saved on the disk but in reality LaCie StorView Storage Management Software User Manual More on Snapshot page 158 17. 9. 1. [. . . ]