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Full Discussion: When kill doesnt work, how to kill a process ?
Top Forums UNIX for Advanced & Expert Users When kill doesnt work, how to kill a process ? Post 302073218 by Perderabo on Thursday 11th of May 2006 04:36:47 AM
Old 05-11-2006
If it has died and is now a zombie, killing the parent process will cause it to be re-parented to init which will reap it. But if it is sleeping at a high kernel priority, the only general answer is to reboot the system. Since you're on HP-UX, you should use glance to examine the process and determine what it is waiting for. Then there is some chance that you can correct it. For example, if it is trying to close a tape drive that has been powered off, bringing the tape drive back online may allow the close to succeed. Or maybe it is trying to write to /dev/console and someone typed an X-off (control s), so typing an X-on (control q) may allow the write to finish. If it is doing disk i/o to an NFS mounted filesystem with nointr, fixing the NFS server or the network may do it. Or maybe it is a bug in the kernel and so you want to identify what resource it is waiting for and then check for patches that look applicable. This won't help kill the particular process you have now, but patching the kernel would insure it doesn't keep on happening.
 

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LEARN ABOUT OPENSOLARIS

dda

dda(7D) 							      Devices								   dda(7D)

NAME

       dda - MMS disk archiving driver

SYNOPSIS

       /devices/pseudo/dda@lun:bn

DESCRIPTION

       The  Media Management System (MMS) is a distributed removable media management system based on the IEEE 1244 Media Management System speci-
       fication. MMS provides a uniform and consistent tape interface to client applications.

       The dda driver is a pseudo tape drive with filesystem file media. The dda driver is a minimal emulation of the st(7D) tape driver  mtio(7I)
       interface  with	BSD no-rewind behavior and is used for MMS disk archiving. The dda driver should be used with a MMS MMP mount command han-
       dle. You configure DDA tapes, drives, and libraries for disk archiving using the mmsadm(1M) command. You also use mmsadm(1M) to	mount  and
       unmount dda media.

CONFIGURATION

       To  set	the  number  of disk archiving tape drives available for MMS disk archiving, edit the /kernel/drv/dda.conf configuration file. The
       default number of disk archiving tape drives is 20.

       The disk archiving tape drive devlinks are located in the /dev/dda directory.

       The DDA maximum block size is 262144 bytes and the minimum is 1 byte.

FILES

       /kernel/drv/dda		  32-bit kernel module (x86)

       /kernel/drv/sparcv9/dda	  64-bit kernel module (SPARC)

       /kernel/drv/amd64/dda	  64-bit kernel module (x86)

       /kernel/drv/dda.conf	  dda configuration file

ATTRIBUTES

       See attributes(5) for a description of the following attributes:

       +--------------------+---------------------------------------------------------+
       |  ATTRIBUTE TYPE    |			  ATTRIBUTE VALUE		      |
       +--------------------+---------------------------------------------------------+
       |Architecture	    | SPARC, x86					      |
       +--------------------+---------------------------------------------------------+
       |Availability	    | SUNWmmsr						      |
       +--------------------+---------------------------------------------------------+
       |Interface Stability | Uncommitted					      |
       +--------------------+---------------------------------------------------------+

SEE ALSO

       mt(1), mmsadm(1M), attributes(5), dmd(7D), st(7D), mtio(7I)

       IEEE 1244 Removable Media Standards Specification -- IEEE, 2000

SunOS 5.11							    17 Oct 2008 							   dda(7D)
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