sys_attrs_cam(5)						File Formats Manual						  sys_attrs_cam(5)

NAME

       sys_attrs_cam, sys_attrs_cam_disk, sys_attrs_cam_tape - SCSI CAM I/O subsystem attributes

DESCRIPTION

       This  reference	page  lists  and  describes  attributes  for  the following kernel subsystems associated with the SCSI CAM I/O system: cam
       cam_adapter-id cam_disk cam_tape

       An asterisk (*) precedes the name of an attribute that is modifiable at run time. However, the ability to modify the value at run-time  may
       be  a  software requirement. Read the attribute description carefully to determine whether run-time configuration should ever be done manu-
       ally.

       Refer to the sys_attrs(5) reference page for an introduction to the topic of kernel subsystem attributes.

   cam and Adapter-Specific Cam Subsystem Attributes
       Values of attributes for the CAM (cam) subsystem and adapter-specific (cam_adapter-id) CAM subsystems should never be modified.

   cam_disk Subsystem Attributes
       Attributes for the cam_disk subsystem should be changed internally or under the direction of support personnel. Most  of  these	attributes
       have  a	global	effect across all disk devices. If the affected devices are of the same type, a global change may be appropriate. However,
       global changes applied to devices with different requirements is likely to adversely affect some  of  the  devices.  The  Hardware  Manager
       application allows you to apply device-specific adjustments and it is recommended that you use this interface.

	      Number  of  seconds  that  the  subsystem waits in the presence of repeated device busy signals before performing a bus device reset
	      operation on the device.

	      Do not modify the setting for this attribute unless instructed to do so by support personnel or by patch kit documentation.

	      This attribute has effect only in a TruCluster environment.

	      Do not modify the setting for this attribute unless instructed to do so by support personnel or by patch kit documentation.

	      This attribute has effect only in a TruCluster environment.

	      Do not modify the setting for this attribute unless instructed to do so by support personnel or by patch kit documentation.

	      This attribute has effect only in a TruCluster environment.

	      Do not modify the default setting for this attribute unless instructed to do so by support personnel or by patch kit documentation.

	      A value that indicates how long to wait after the start of constant "no connection" errors  for  the  disk  device  before  starting
	      recovery	procedure.  The default value indicates that all bits are set to 1. This specifies that disk driver defaults for this wait
	      interval are applied.

	      Do not modify the setting for this attribute unless instructed to do so by support personnel or by patch kit documentation.  A  set-
	      ting  change  is	global;  that is, it overrides the default wait interval for all disk drivers and is likely to cause unpredictable
	      behavior in some devices.

	      Do not modify the setting for this attribute unless instructed to do so by support personnel or by patch kit documentation.

	      Disk drive initialization state, which is set by the subsystem. This attribute is query only.

	      A query-only identifier that is set by the subsystem.

	      A query-only identifier that is set by the subsystem.

	      Do not modify the setting for this attribute unless instructed to do so by support personnel or by patch kit documentation.

	      Default value: 2 (spinups)

	      Number of seconds that device polling reveals a drive is inactive before spinning down the disk.

	      Default value: 30 (seconds)

	      Minimum value: 5

	      Maximum value: 65,535

   cam_tape Subsystem Attributes
	      Do not modify the default setting for this attribute unless instructed to do so by support personnel or by patch kit documentation.

	      Default value: 0

	      A value queried by the tape device driver to determine its initialization state. You cannot modify this variable. The driver changes
	      the value from 0 (when the system starts to boot) to 1 (during the boot operation).

	      A value that specifies the system behavior when a write-locked tape is opened with the O_RDWR or O_WRONLY flag. The default and rec-
	      ommended behavior (1) is to return failure on the open operation. The alternate behavior (0) is to  allow  the  open  operation  but
	      return failure on an attempt to write to the tape.

	      Default value: 1

	      It  is  recommended that you do not change the default. The 0 value is intended only for customers whose applications ran on DIGITAL
	      UNIX versions earlier than Version 4.0B and depend on the open behavior in effect for those earlier versions.

SEE ALSO

       sys_attrs(5)

																  sys_attrs_cam(5)