A-2
PCI I/O Board Installation and Component Replacement • April 1998
To disable or enable UltraSCSI for specific controllers or drives, see the sections that
follow.
Note –
The Sun Enterprise PCI I/O board does not support UltraSCSI devices
connected to the onboard SCSI interface at this time. If there are any UltraSCSI
drives connected to the onboard SCSI interface, refer to the following section to force
the drive to run at FastSCSI speed.
A.2.2
Disabling UltraSCSI on PCI ISP Devices
By default the SCSI options are turned on (
0x7f8
). To disable UltraSCSI, turn the
SCSI options off (
0x3f8
).
Note –
The system must be rebooted for the SCSI options to take effect.
The following sections describe procedures for specific conditions.
A.2.2.1
Disabling All UltraSCSI Devices on a Controller
●
To disable only one controller, add an entry similar to this to the
/kernel/drv/
isp.conf
file :
Note –
Entries in the
/kernel/drv/isp.conf
file override entries in the
/etc/
system
file.
Use the method in this section for standard system configurations. For non-standard
configurations, use the method described in Section A.2.1 “Disabling UltraSCSI for
the System” on page A-1.
name="isp" parent="
/pci@1f,4000/pci@4
"
unit-address="
4
"
scsi-options=0x3f8;
