Background Information for Creating RAID-0 VolumesSolaris Volume ManagerAdministration Guide • May 200680
Scenario—RAID-0 VolumesRAID-0 volumes provide the fundamental building blocks for creating more complex storageconfigurations or for building mirrors. The following example, drawing on the scenario explained inChapter 5, describes how RAID-0 volumes can provide larger storage spaces and allow you toconstruct a mirror of existing file systems, including root (/).The sample system in the scenario has a collection of relatively small (9 Gbyte) disks, but specificapplications would likely require larger storage spaces. To create larger spaces (and improveperformance), you can create a stripe that spans multiple disks. For example, each one of thefollowing disks,c1t1d0,c1t2d0,c1t3d0,c2t1d0,c2t2d0, andc2t3d0, could be formatted with aslice0that spans the entire disk. Then, a stripe including all three of the disks from one controllercould provide approximately 27 Gbytes of storage and allow faster access. The second stripe, fromthe second controller, could be used for redundancy, as described inChapter 11and specifically in the“Scenario—RAID-1 Volumes (Mirrors)” on page 103.Scenario—RAID-0 VolumesChapter 8 • RAID-0 (Stripe and Concatenation) Volumes (Overview)81
RAID-0 (Stripe and Concatenation) Volumes(Tasks)This chapter contains information about tasks that are related to RAID-0 volumes. For informationabout related concepts, seeChapter 8.RAID-0 Volumes (Task Map)The following task map identifies the procedures that are needed to manage Solaris Volume ManagerRAID-0 volumes.TaskDescriptionFor InstructionsCreate RAID-0 (stripe)volumesUse the Solaris Volume Manager GUI or themetainitcommand to create a new volume.“How to Create a RAID-0(Stripe) Volume” on page 84Create RAID-0(concatenation) volumesUse the Solaris Volume Manager GUI or themetainitcommand to create a new volume.“How to Create a RAID-0(Concatenation) Volume”on page 85Expand storage spaceUse the Solaris Volume Manager GUI or themetainitcommand to expand an existingfile system.“How to Expand StorageCapacity for Existing Data”on page 87Expand an existing RAID-0volumeUse the Solaris Volume Manager GUI or themetattachcommand to expand an existingvolume.“How to Expand an ExistingRAID-0 Volume” on page 88Remove a RAID-0 volumeUse the Solaris Volume Manager GUI or themetaclearcommand to delete a volume.“How to Remove a RAID-0Volume” on page 909C H A P T E R983
Creating RAID-0 (Stripe) VolumesCaution –Do not create a stripe from an existing file system or data. Doing so destroys data. To createa stripe from existing data, you must back up the data, create the stripe volume, and then restore thedata to the volume.