IBM 86884RX Installation Guide - Page 88

Configuring SCSI controller and internal disks, Boot devices

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To edit any text file, use the edit command. To restart the server (no confirmation), use reset. To power off the server, use reset -s. Configuring SCSI controller and internal disks The internal LSI SCSI/RAID controller can treat the internal disks in two different ways: As two standalone disks As two parts of a mirrored volume (that is, RAID-1 capability) Both ways are supported for operating system installation, although installing on the single non-redundant disk is not recommended. The embedded LSI controller supports a RAID-1 (mirror) configuration of the two drives in the internal drive bays. The only possible configuration consists of a single logical drive spanning the two disks. There is no way to create multiple logical volumes at the controller level. The advantage of the embedded LSI controller is that the content of the primary disk (the disk marked as Primary in the Mirroring Properties menu) stays intact and is copied to the secondary disk during the first synchronization. This feature means that the installation of the operating system and the creation of the mirror can be done in any order. Tip: Even though the content of the primary disk stays intact after mirror creation, we recommend you create a full backup before the procedure. In the following steps, we describe the process of first creating a RAID-1 array, then installing the operating system once the logical volume has been created. Boot devices: Booting from any disks other than those attached to the internal LSI controller is not supported. 74 IBM ^ xSeries 450 Planning and Installation Guide

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74
IBM
^
xSeries 450 Planning and Installation Guide
±
To edit any text file, use the
edit
command.
±
To restart the server (no confirmation), use
reset
. To power off the server, use
reset -s
.
Configuring SCSI controller and internal disks
The internal LSI SCSI/RAID controller can treat the internal disks in two different
ways:
±
As two standalone disks
±
As two parts of a mirrored volume (that is, RAID-1 capability)
Both ways are supported for operating system installation, although installing on
the single non-redundant disk is not recommended.
The embedded LSI controller supports a RAID-1 (mirror) configuration of the two
drives in the internal drive bays. The only possible configuration consists of a
single logical drive spanning the two disks. There is no way to create multiple
logical volumes at the controller level.
The advantage of the embedded LSI controller is that the content of the primary
disk (the disk marked as Primary in the Mirroring Properties menu) stays intact
and is copied to the secondary disk during the first synchronization. This feature
means that the installation of the operating system and the creation of the mirror
can be done in any order.
In the following steps, we describe the process of first creating a RAID-1 array,
then installing the operating system once the logical volume has been created.
Tip:
Even though the content of the primary disk stays intact after mirror
creation, we recommend you create a full backup before the procedure.
Boot devices:
Booting from any disks other than those attached to the
internal LSI controller is not supported.