IBM 86624RY Maintenance Manual - Page 99
Attention, Synchronize, Initialize, after, before
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mode when you select a specific logical drive icon from the Main Tree. When this feature is set to the write-through mode, the completion status of a write command is sent after the data is written to the hard disk drive. Under certain workloads, you can improve performance by changing this setting to the write-back mode, where the completion status of a write command is sent after the data is copied to cache memory, but before the data is actually written to the storage device. Attention 1. You might lose data if a power outage occurs while using the write-back mode without a battery-backup cache device. 2. If you do not have a battery-backup cache installed and Enabled and you set this feature to the write-back mode, wait at least 10 seconds after the last operation before you turn off the system. Failure to follow this practice can result in lost data. Synchronize: This choice is available in the Information mode when you select a logical drive from the Main Tree and the following conditions are both true: - The ServeRAID adapter or controller does not support the auto-synchronization feature. - You previously selected Options from the View pull-down menu and disabled the "Synchronize all new RAID level-5 logical drives" setting. Synchronizing a logical drive verifies that the data redundancy for the logical drive is correct. You must synchronize all RAID level-5 logical drives before storing data. (See page 79 for more information.) Initialize: This choice is available in the Information mode when you select a logical drive from the Main Tree and you previously selected Options from the View pull-down menu and disabled the "Automatically initialize new logical drives" setting. Netfinity 5500 M20 - Type 8662 91