C H A P T E R 3
Managing Disk Volumes
This chapter describes redundant array of independent disks (RAID) concepts, how to manage disk volumes, and how to configure hardware mirroring using the
This chapter contains the following sections:
■“Disk Volumes” on page 51
■“Volume Management Software” on page 52
■“RAID Technology” on page 54
■“Hardware Disk Mirroring” on page 56
■“Physical Disk Slot Numbers, Physical Device Names, and Logical Device Names” on page 57
■“To Create a Hardware Disk Mirror” on page 57
■“To Delete a Hardware Disk Mirror” on page 59
■“To Perform a Mirrored Disk
■“To Perform a
Disk Volumes
Disk volumes are logical disk devices comprising one or more physical disks or partitions from several different disks.
Once you create a volume, the operating system uses and maintains the volume as if it were a single disk. By providing this logical volume management layer, the software overcomes the restrictions imposed by physical disk devices.
Sun’s volume management products also provide RAID data redundancy and performance features. RAID is a technology that helps protect against disk and hardware failures. Through RAID technology, volume management software is able to provide high data availability, excellent I/O performance, and simplified administration.
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