11-12-2010
"rmt0" is not a valid backing device - VIO
hello to all,
i am trying to assing a tape drive to a virtual partition through VIO but i get the message "rmt0" is not a valid backing device.
the oslevel of my VIO is AIX 6.1.3.0. when i run the command
lsdev |grep rmt i get the following result:
rmt0 Available 08-08-00-0,0 Other SCSI Tape Drive
the problem is when i use the command mkvdev to assign the tape drive to the virtual partition. the command i use is the following:
mkvdev -vdev rmt0 -vadapter vhost3 -dev LTO4
when i run this command i get the message mentioned above.
also i check the entry in the ODM for the rmt and i when i run then command odmget CuDv i get the following result:
CuDv:
name = "rmt0"
status = 1
chgstatus = 0
ddins = "tape"
location = "08-08-00-0,0"
parent = "scsi0"
connwhere = "0,0"
PdDvLn = "tape/scsi/ost"
i find the the status=1 means that the device is defined. so is there a way to change the status of the device in the ODM database and if i can, does this fix the problem that i face?
if it is helpful the AIX version of my virtual partition is 5.3.0.0
thank you for your time
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LEARN ABOUT DEBIAN
roarvio
roarvio(7) System Manager's Manual: RoarAuido roarvio(7)
NAME
libroar - RoarAudio sound library
roarvio - RoarAudio virtual IO layer
SYNOPSIS
#include <roaraudio.h>
struct roar_vio_calls;
DESCRIPTION
The RoarAudio VIO interface is RoarAudio's IO abstraction layer. It provides basic IO functions such as read and write independing on the
underlaying IO. For Example can you open a plain or a gziped file via the VIO layer. After a successful open both objects behave the same,
libroar takes care about the compression in the gzip case.
TUTORIALS
Tutorials can be found in roartutvio(7).
IMPORTANT FUNCTIONS
There are several important functions. This is a small list of the most important ones.
Opening
roar_vio_open_file(3), roar_vio_open_fh(3), roar_vio_open_stdio(3), roar_vio_open_dstr(3), roar_vio_open_proto(3).
While there are a lot functions important for opening files the most important one is roar_vio_open_dstr(3). It opens a stream based
on URLs that can point to local files or files on remote machines. It also can handle compression and encryption.
Closing
roar_vio_close(3), roar_vio_shutdown(3)
Reading and writing
roar_vio_read(3), roar_vio_write(3)
Seeking and positioning
roar_vio_lseek(3)
Non-Blocking and Asyncron IO
roar_vio_nonblock(3), roar_vio_sync(3), roar_vio_select(3)
Networking and Sockets
roar_vio_accept(3)
String handling
roar_vio_printf(3)
BUGS
A lot...
SEE ALSO
roar-config(1), roartypes(1), roartutvio(7), RoarAudio(7).
RoarAudio May 2011 roarvio(7)