Re: booting and fiber disks (SUMMARY)

We didn't install terminators.
Maybe that was the problem as we received an error when
attempting to scan the fiber devices
I'll try that next time.

>From all of the emails that I received, it appears that the system needs
to scan all of the hardware before booting on the specified device.

Thanks to all who responded!

Dave Zarnoch
Nationwide Provident
zarnocd@xxxxxxxxxxxxxxxxxxxxxxx




"Green, Simon"
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LTRIA.COM> cc:
Sent by: IBM AIX Subject: Re: booting and fiber disks
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01/23/2006 02:17
PM
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No: this is something different. Assuming the bootlist is correct the
system is not scanning the disks for another boot device, it's simply
building the hardware configuration. It needs to do this even if you're
booting from CD. If you check the LEDs you'll see all the usual codes you
see for cfgmgr.

I'm not sure what happened when you disconnected the fiber: that should
have
speeded things up as there wouldn't have been all those disk devices to
configure. Did you physically disconnect the cables from the server and
replace them with suitable terminators, (if required)?

--
Simon Green

Altria ITSC Europe s.a.r.l.

AIX-L Archive at https://new-lists.princeton.edu/listserv/aix-l.html
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Please post all follow-ups to the list.


-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@xxxxxxxxxxxxx] On Behalf Of
Dave
Zarnoch
Sent: 23 January 2006 19:00
To: aix-l@xxxxxxxxxxxxx
Subject: Re: booting and fiber disks


Soooo....

Basically, the "man" page is incorrect

It say:

When searching for a boot device, the system selects the first device in
the
list and determines if it is bootable. If no boot file system is detected
on the
first device, the system moves on to the next device in the list. As a
result,
the ordering of devices in the device list is extremely important.

Here is our bootlist:

cd0 hdisk0

Both are bootable but the system still searches the entire disk inventory

Dave Zarnoch
Nationwide Provident
zarnocd@xxxxxxxxxxxxxxxxxxxxxxx
W 302-452-4197
C 302-462-8703




Holger.VanKoll@SW

ISSCOM.COM To:
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Sent by: IBM AIX cc:

Discussion List Subject: Re: booting and
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01/23/2006 10:31

AM

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no.
it is normal for this hardware to scan all devices when booting up.


-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@xxxxxxxxxxxxx] On Behalf Of
Dave Zarnoch
Sent: Monday, January 23, 2006 4:22 PM
To: aix-l@xxxxxxxxxxxxx
Subject: Re: booting and fiber disks

Yes,

When we tried to set the boot device in the SMS menu, it still scanned
all of the fibre disks.

Anyway around this?

Dave Zarnoch
Nationwide Provident
zarnocd@xxxxxxxxxxxxxxxxxxxxxxx
W 302-452-4197
C 302-462-8703




Holger.VanKoll@SW

ISSCOM.COM To:
aix-l@xxxxxxxxxxxxx
Sent by: IBM AIX cc:

Discussion List Subject: Re: booting and
fiber disks
<aix-l@Princeton.

EDU>





01/23/2006 09:46

AM

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>Even though the bootlist only contains cd0, it will still search every
single fibre attached diskin order to boot

are you sure it tried to boot from every san-disk?

or was the box just scanning its devices, which is/works as designed?


>(We also disconnected the fiber and the boot just hung)
strange... did you try to setup/choose the boot-device directly in the
sms-menus?


-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@xxxxxxxxxxxxx] On Behalf Of
Dave Zarnoch
Sent: Monday, January 23, 2006 3:31 PM
To: aix-l@xxxxxxxxxxxxx
Subject: booting and fiber disks

We had some problems booting from cd0 on a box that has a fiber
connection to an EMC box.

Even though the bootlist only contains cd0, it will still search every
single fibre attached diskin order to boot

Is there a way around this?

(We also disconnected the fiber and the boot just hung)

Thanks!



Dave Zarnoch
Nationwide Provident
zarnocd@xxxxxxxxxxxxxxxxxxxxxxx

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