3Ware 9550SXU-12 User Guide - Page 108
Exporting JBOD Disks, To enable or disable spinup and set the delay between spinups
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Configuring Your Controller It is possible to enable or disable automatic detection of drives on the controller's ports for staggered spinup during hot swapping of drives. This feature is only available in the CLI using the autodetect=on|off command. For more information, see /cx set autodetect=on|off disk=|all 3ware SAS/SATA RAID Controller CLI Guide. Note: Some hard drives require that the power management jumper (PM2) be set to enable staggered spinup, in order for the SATA OOB option to be used. For more information, see the knowledgebase article 14889, at http://www.3ware.com/KB/article.aspx?id=14889 To enable or disable spinup and set the delay between spinups 1 At the main 3BM screen, Tab to Policy and press Enter. 2 On the Policy Control screen, Tab through these fields, making the choices you want to use: • Staggered Spinup: Choose enabled or disabled. • Number of Drives Per Spinup: Select the number of drives, depending on the number of ports on the controller. • Delay between spinup: Select the number of seconds-from 1 to 6. 3 Tab to the OK button and press Enter. You will notice a short delay as 3BM makes the policy changes. Exporting JBOD Disks By default, JBOD disks (unconfigured disks) connected to the 3ware RAID controller are not exported to the operating system. This means that any drives you leave unconfigured are not seen by the operating system, and cannot be used for storage. When Export JBOD Disks is set to No, you make individual disks available for use by configuring them as Single Disks. If you want unconfigured disks to be available on your computer, you can change this setting in 3BM or CLI. Note: It is recommended that JBODs not be made available to the operating system. The advantages of working with configured Single Disks over JBOD are: If interrupted, a single disk media scan will continue from where it left off, while a JBOD media scan must restart from the beginning. Single disks can take advantage of the controller caching and the configuration is persistent. Single disks can be migrated to redundant units in the future (e.g. A single disk will be able to be mirrored to another drive, creating a RAID 1 array). 96 3ware SAS/SATA RAID Software User Guide, Version 9.5.1