Re: booting and fiber disks
- From: "Green, Simon" <Simon.Green@xxxxxxxxxxxxx>
- Date: Mon, 23 Jan 2006 20:17:43 +0100
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.
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-----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: aix-l@xxxxxxxxxxxxx
Sent by: IBM AIX cc:
Discussion List Subject: Re: booting and
fiber disks
<aix-l@Princeton.
EDU>
01/23/2006 10:31
AM
Please respond to
IBM AIX
Discussion List
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
Please respond to
IBM AIX
Discussion List
>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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