3Ware 9550SXU-16ML User Guide - Page 105

3DM 2 Reference Other Controller Settings For 9000-series controllers, the Other Controller settings displays information about additional settings, most of which can only be changed in the BIOS (3BM). For more information see "Viewing and Setting Controller Policies" on page 117. This section does not appear for 7000- and 8000- series controllers. Auto-Rebuild. For 9550SX controllers, the Auto-Rebuild policy determines how the controller firmware will attempt to rebuild degraded units. When Auto-Rebuild is disabled, only spares will be used to automatically rebuild degraded units. When Auto-Rebuild is enabled, the firmware will automatically select drives to use for rebuilding a degraded unit using the following priority order. „ Smallest usable spare. „ Smallest usable unconfigured (available) drive. „ Smallest usable failed drive. For additional information, see "Setting the Auto-Rebuild Policy" on page 123 Auto-Carving. Auto-carving can be enabled or disabled by selecting the appropriate radio button. When this feature is enabled, any unit that is over a specified size (known as the carvesize) will be broken down into multiple volumes of that size, plus a remainder volume. The default carvesize is 2TB. For example, using the default size, if the unit is 2.5 TB then it will contain two volumes, with the first volume containing 2TB and the second volume containing 0.5 TB. If the unit is 5.0 TB then it will contain 3 volumes, with the first two volumes containing 2TB each and the last volume containing 1TB. Number of Drives Per Spin-up. Number of drives that will spin up at the same time when the controller is powered up. (This setting only applies when the feature is supported by the disk drives.) Delay between Spin-ups. The delay time (in seconds) between drive groups that spin up at one time on this particular controller. Export JBOD (Unconfigured) Disks. Indicates whether unconfigured disks (JBODs) should be exported to the operating system. By default, this setting is disabled and JBOD drives are not exported to the operating system. For more information about this feature, see "Exporting JBOD Disks" on page 119. Disable Write Cache on Unit Degrade. For 9500S controllers, indicates whether write cache will be automatically disabled on a unit if it becomes degraded. After the unit is rebuilt, the write cache will be re-enabled automatically. (This option does not apply to 9550SX controllers; it is integrated into the StorSave policy.) www.3ware.com 95