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Hi,

AIX 5.3

I have a machine where /dev/ipldevice doesn't exit
I can reboot it safely ?
How I can I re-create it ?

Thanks in advance

astalavista wrote:
> Hi,
>
> AIX 5.3
>
> I have a machine where /dev/ipldevice doesn't exit
> I can reboot it safely ?
> How I can I re-create it ?
>
> Thanks in advance
>
>
I did this today, and there is probably a more accepted way.

I made a hard link from my rhdiskX device to /dev/ipldevice.

If your boot device is /dev/hdisk0, then the command line would be as
follows:

ln /dev/rhdisk0 /dev/ipldevice

Again, there is probably a more acceptable way to achieve this, but it
worked for me.

On Aug 20, 9:58 pm, "astalavista" <nob...@nowhere.com> wrote:
> Hi,
>
> AIX 5.3
>
> I have a machine where /dev/ipldevice doesn't exit
....
Since some OS updates require an update of the ipldevice ( boot
image ) i would suggest that you find out why the ipldevice vanished.

regards
Hajo

On 21 Aug., 10:34, Hajo Ehlers <serv...@metamodul.com> wrote:
> On Aug 20, 9:58 pm, "astalavista" <nob...@nowhere.com> wrote:> Hi,
>>[...]
> Since some OS updates require an update of the ipldevice ( boot
> image ) i would suggest that you find out why the ipldevice vanished.
>
> regards
> Hajo

Depending on the oslevel there is/was a bug causing the /dev/ipldevice
being deleted and not recreated. Was fixed by the following
APAR:IY94631

http://www-1.ibm.com/support/docview...id=isg1IY94631

On Aug 20, 4:51 pm, 0xdeadabe <n...@nowhere.net> wrote:
> astalavista wrote:
> > Hi,
>
> > AIX 5.3
>
> > I have a machine where /dev/ipldevice doesn't exit
> > I can reboot it safely ?
> > How I can I re-create it ?
>
> > Thanks in advance
>
> I did this today, and there is probably a more accepted way.
>
> I made a hard link from my rhdiskX device to /dev/ipldevice.
>
> If your boot device is /dev/hdisk0, then the command line would be as
> follows:
>
> ln /dev/rhdisk0 /dev/ipldevice
>
> Again, there is probably a more acceptable way to achieve this, but it
> worked for me.

A long time ago this happend to me (losing /dev/ipldevice). I
*believe* the correct solution is to use the mknod command.

Example commands:
cd /dev
mknod ipldevice c <major number> <minor number>
chmod 600 ipldevice
chown root:system
run bosboot

The major number, minor number correspond to the major number, minor
number of the hdisk that contains hd5.

Looking at my current system (aix 5.3):

root@ms:/dev>ll | grep ipl
crw-rw---- 2 root system 10, 1 Jan 21 2005 ipl_blv
crw------- 2 root system 23, 0 Jan 21 2005 ipldevice
root@ms:/dev>ll | grep hd5
brw-rw---- 1 root system 10, 1 Aug 18 19:34 hd5
crw-rw---- 2 root system 10, 1 Jan 21 2005 rhd5
root@ms:/dev>ll | grep "23, 0"
brw------- 1 root system 23, 0 Jul 16 2006 hdisk1
crw------- 2 root system 23, 0 Jan 21 2005 ipldevice
crw------- 2 root system 23, 0 Jan 21 2005 rhdisk1

root@ms:/dev>lspv -l hdisk1
hdisk1:
LV NAME LPs PPs DISTRIBUTION MOUNT POINT
hd8 1 1 00..00..01..00..00 N/A
hd6 8 8 00..03..05..00..00 N/A
hd2 21 21 00..00..20..01..00 /usr
hd4 4 4 00..00..04..00..00 /
hd3 2 2 00..00..02..00..00 /tmp
hd9var 8 8 08..00..00..00..00 /var
hd10opt 3 3 00..00..03..00..00 /opt
hd1 136 136 18..01..16..101..00 /home
hd5 1 1 01..00..00..00..00 N/A
sysdumpdev_lv 16 16 00..00..09..07..00 N/A
fslv00 1 1 00..01..00..00..00 /tftpboot
nim_log 1 1 01..00..00..00..00 N/A
sybase_lv 16 16 16..00..00..00..00 /home/sybase
paging00 8 8 00..00..08..00..00 N/A


That's sounds about right.

Miles

On Aug 20, 3:58 pm, "astalavista" <nob...@nowhere.com> wrote:
> Hi,
>
> AIX 5.3
>
> I have a machine where /dev/ipldevice doesn't exit
> I can reboot it safely ?
> How I can I re-create it ?
>
> Thanks in advance

You running EMC disk by any chance? Power Path?

I recall an EMC tech advisory that dealt with missing /dev/ipldevice

I think their script was bad, and deleted /dev/ipldevice if rootvg
happened to be mirrored.

>
> You running EMC disk by any chance? Power Path?
>
> I recall an EMC tech advisory that dealt with missing /dev/ipldevice
>
> I think their script was bad, and deleted /dev/ipldevice if rootvg
> happened to be mirrored.
>
Thanks for all answers
Yes we run powerpath
this why ipldevice disappear ...

On Aug 21, 3:34 pm, "astalavista" <nob...@nowhere.com> wrote:
> > You running EMC disk by any chance? Power Path?
>
> > I recall an EMC tech advisory that dealt with missing /dev/ipldevice
>
> > I think their script was bad, and deleted /dev/ipldevice if rootvg
> > happened to be mirrored.
>
> Thanks for all answers
> Yes we run powerpath
> this why ipldevice disappear ...

Well the EMC advisory is ETA emc101218 and only applies to
PowerPath 4.3

This is a couple of years old, and is fixed in PowerPath 4.4 and
above.
In PP 4.3 the rc.emcpower script was bad. (if rootvg is mirrored)

Is your rootvg mirrored?
PowerPath 4.3 ?

If so, see emc101218, or post contents of /etc/rc.emcpower
If still under PP support, (hope so), call EMC.