3Ware 9550SXU-12 User Guide - Page 114

Configuring Units Configuration Options When Creating a Unit This section provides an overview of the choices you have when configuring a new unit. For step-by-step instructions, see "Creating a Unit through 3DM" on page 105 and "Creating a Unit through 3BM" on page 107. When you configure a new unit, you specify the following: • Drives to be included in the unit • Name of the unit (optional) • Type of configuration (RAID Level) • Stripe size, if appropriate for the RAID level • Boot volume size (optional; can only be specified in 3BM or CLI) • Multiple Volumes (optional; can only be specified in CLI) • Initialization Method (3BM only) • Unit policies that affect how the unit will be handled You can make some types of changes to the RAID configuration later, and you can change the unit name and the unit policies. For details, see "Changing An Existing Configuration by Migrating" on page 128 and "Setting Unit Policies" on page 116. Note: If you will install the operating system on and boot from a unit managed through the new 3ware RAID controller, see Chapter 3, "First-Time RAID Configuration Using 3BM." Drives to be included in the unit You may include from one to thirty-two drives in the unit, depending on the number of drives available and the model of the controller you have. (For information about how many drives to select for a given RAID level, see "Determining What RAID Level to Use" on page 12.) When creating units on the 9690SA controller, you cannot mix SAS and SATA drives in the same unit. Available drives are those that are not currently part of a unit. If you want to use drives that are currently part of a different unit, you must first delete that unit to make the drives available. (For details, see "Deleting a Unit" on page 133.) If drives are listed under "Incomplete Drives and Others," they must be deleted before they can be used. If you want to add drives to a unit, see "Adding a Drive" on page 142. 102 3ware SAS/SATA RAID Software User Guide, Version 9.5.1