system.4 (2010 09)

s
system(4) system(4)
selects the driver for SCSI disk drives.
module pseudodrv loaded 1.0.[3E0D0C96]
dynamically loads the module pseudodrv.
System files may also contain lines that are used to:
• define the swap device
• define the dump device(s)
• provide an explicit binding a driver to a hardware path
• define status and values of selected system parameters.
Lines are constructed as indicated below for each category.
• Swap Device Specification
This method of swap specification will be obsoleted in future releases.
swapctl() is the preferred
method for configuring swap.
No more than one swap specification is allowed. If swap specification is not given, then primary swap
binding is set to
Default. On a system using the Logical Volume Manager (LVM),
Default is
equivalent to
lvol. On other systems, the
Default is to page to the root disk, in the area between
the end of the root file system and the end of the disk.
swap hw_path offset [ blocks ]
Configure the swap device location and its size as specified. Arguments are inter-
preted as follows:
hw_path The hardware path representing the device to configure as the swap device
or the string default may be used to indicate using the root device.
offset The swap area location. Boundaries are located at 1K-byte intervals. A
negative value specifies that a file system is expected on the device. At
boot-up, the super block is read to determine the exact size of the file sys-
tem, and this value is put in offset. If the swap device is auto-configured,
this is the mechanism used. If the super block is invalid, the entry will be
skipped so that a corrupted super block will not later cause the entire file
system to be corrupted by configuring the swap area on top of it. A positive
or zero value for offset specifies the minimum area that must be reserved.
Zero means to reserve no area at the head of the device. A zero value
implies that there is no file system on the device.
blocks The number (in decimal) of 1K-byte disk blocks in the swap area. For this
swap device specification, only the blocks parameter is optional. Zero is the
default for auto-configuration. If blocks is zero, the entire remainder of the
device is automatically configured in as swap area. If blocks is non-zero,
its absolute value is treated as an upper bound for the size of the swap
area. Then, if the swap area size has actually been cut back, the sign of
blocks determines whether blocks remains as is, resulting in the swap area
being adjacent to the reserved area, or whether blocks is bumped by the
size of the unused area, resulting in the swap area being adjacent to the
tail of the device.
swap lvol Configure swap on a logical volume.
swap none Configure the kernel with no swap device.
• Dump Device Specifications
One or more dump specifications are allowed. If a dump specification is not given, then the primary
swap area will be used.
dump hw_path Configure the dump device location and its size as specified. hw_path is the
hardware path representing the device to configure as a dump device or the string
default may be used to indicate using the primary swap area.
dump lvol Configure dump on a logical volume.
dump none Configure the kernel with no dump device.
2 Hewlett-Packard Company − 2 − HP-UX 11i Version 3: September 2010