Sun Microsystems SPARC Enterprise T1000, Руководство администратора

Страница: 60 / 82

42 Sun SPARC Enterprise T1000 Server Administration Guide • April 2007
Caution – Creating RAID volumes using the on-board disk controller destroys all
data on the member disks. The disk controller’s volume initialization procedure
reserves a portion of each physical disk for metadata and other internal information
used by the controller. Once the volume initialization is complete, you can configure
the volume and label it using
format
(1M). You can then use the volume in the
Solaris Operating System.
Hardware Raid Operations
On the server, the SAS controller supports mirroring and striping using the Solaris
OS
raidctl
utility.
A hardware RAID volume created under the
raidctl
utility behaves slightly
differently than one created using volume management software. Under a software
volume, each device has its own entry in the virtual device tree, and read-write
operations are performed to both virtual devices. Under hardware RAID volumes,
only one device appears in the device tree. Member disk devices are invisible to the
operating system, and are accessed only by the SAS controller.
Physical Disk Slot Numbers, Physical Device
Names, and Logical Device Names for Non-RAID
Disks
If your system encounters a disk error, often you can find messages about failing or
failed disks in the system console. This information is also logged in the
/var/adm/messages
files.
These error messages typically refer to a failed hard drive by its physical device
name (such as
/devices/pci@7c0/pci@0/pci@8/scsi@2/sd@1,0
) or by its logical
device name (such as
c0t0d0
). In addition, some applications might report a disk
slot number (0 or 1).