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70 Sun Enterprise 220R Server Owner’s Guide • October 1999
About Disk Array Configurations and
Concepts
The Solstice DiskSuite software is designed for use with the Sun Enterprise 220R
server’s internal and external disk drives. The software supports a variety of
configurations called disk arrays, which improve storage performance, capacity, and
availability.
Note – Solstice DiskSuite and other software must be ordered separately.
This section describes some of the most popular and useful of those configurations,
including:
■
Disk concatenation
■
Disk mirroring (RAID 1)
■
Disk striping (RAID 0)
■
Disk striping with parity (RAID 5)
■
Hot spares
■
Hot plug
The DiskSuite software creates metadevices—logical disk devices consisting of one or
more physical disks or partitions from several disks. Once you use Solstice DiskSuite
to create a metadevice, the operating system uses and maintains the metadevice as if
it were a single device.
For instance, you can combine the two disks
c1t2d0s2
and
c1t3d0s2
into the
metadevice
/dev/md/rdsk/d0
.
The Sun Enterprise 220R server’s internal disks support RAID 1, RAID 0, and RAID
1 + RAID 0. More complicated configurations, including RAID 5, are supported
using external disk arrays and one or more PCI host adapter cards.