5. what is tunable parameters?can i altered it ? Post: 302724555

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scsi_maxphys

scsi_maxphys(5) 						File Formats Manual						   scsi_maxphys(5)

NAME

       scsi_maxphys - maximum allowed length of an I/O on all SCSI devices (OBSOLETE)

VALUES

   Failsafe
   Default
   Allowed values
   Recommended values
DESCRIPTION

       Note: This tunable is obsolete.	It is replaced by the attribute, which can be get and set using the command (see scsimgr(1M)).

       This  tunable  sets  the  maximum  data	size the SCSI subsystem will accept for an I/O.  Depending on the device's characteristics and the
       device driver configuration, the maximum size allowed by the SCSI subsystem for a particular SCSI device might be lower than  or  equal	to
       this tunable's value.  It will never be greater.

   Who Is Expected to Change This Tunable?
       Any customer.

   Restrictions on Changing
       Changes to this tunable will take effect when the device is first opened.

   When Should the Value of This Tunable Be Raised?
       The value should never be raised.

   When Should the Value of This Tunable Be Lowered?
       The value should never be lowered.

   What Other Tunables Should Be Changed at the Same Time as This One?
       None.

WARNINGS

       All HP-UX kernel tunable parameters are release specific.  This parameter has been obsoleted for HP-UX 11i Version 3.

       Installation  of  optional  kernel  software, from HP or other vendors, may cause changes to tunable parameter values.  After installation,
       some tunable parameters may no longer be at the default or recommended values.  For information about the effects of installation  on  tun-
       able  values,  consult  the documentation for the kernel software being installed.  For information about optional kernel software that was
       factory installed on your system, see at

AUTHOR

       was developed by HP.

OBSOLETE
						     Tunable Kernel Parameters						   scsi_maxphys(5)