I think the problem Jim is trying to avoid is the fact that Linux at
boot time will generate a ton of less than useful console messages if it
finds that some of it's dasd devices don't have at least some low level
format already in place....lots and lots of "CCW command rejects" and
i/o errors. If you have a number of Linux images all generating these
console messages at boot time, your automated VM console management can
become overwhelmed.....
Mike Walter wrote:
OK, time to show my Linux ignorance...
I've never understood why Linux needs CMS to format the MDISK before Linux
formats it. What a waste of I/O's (even if z _does_ perform I/O VERY,
VERY quickly!). What a waste of time, and what a set of cludgy processes.
What's the deal? Why can't dasdfmt just format what it's given without
CMS having to "prep" it? What would it take to change dasdfmt to do so?
Mike Walter
Hewitt Associates
Any opinions expressed herein are mine alone and do not necessarily
represent the opinions or policies of Hewitt Associates.
"Stracka, James (GTI)" <[EMAIL PROTECTED]>
Sent by: "The IBM z/VM Operating System" <[email protected]>
11/30/2007 08:57 AM
Please respond to
"The IBM z/VM Operating System" <[email protected]>
To
[email protected]
cc
Subject
Re: Formatter forz/Linux Minidisk from CMS
Kludge yes, one pack; no. Because of striping we would need at least
thirteen differently sized template minidisks. Unless we could format
just one very large minidisk and image copy as little as needed. I
believe CMS gets just a little bent out of shape if one did this. Would
not z/Linux too?
-----Original Message-----
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Imler, Steven J
Sent: Friday, November 30, 2007 9:46 AM
To: [email protected]
Subject: Re: Formatter forz/Linux Minidisk from CMS
Kludgy workaround ...
Can you "correctly" format one "template" pack ... then use HiDRO
DUPLICATE (or DDR) to clone the pack with the end result being that the
packs are pre-formatted for the z/Linux guests?
JR (Steven) Imler
CA
Senior Software Engineer
Tel: +1 703 708 3479
Fax: +1 703 708 3267
[EMAIL PROTECTED]
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Stracka, James (GTI)
Sent: Friday, November 30, 2007 09:39 AM
To: [email protected]
Subject: Formatter forz/Linux Minidisk from CMS
Does anyone have or know of a utility that will z/Linux format a minidisk
from CMS?
We have a requirement to format many minidisks for z/Linux usage. Many
z/Linux routines flood the console if we just give the guests unformatted
minidisks. We have been CMS formatting them before sending them to the
z/Linux guests, where it might be days before the owners z/Linux format
them. I would like to be able to z/Linux format the minidisks from CMS
before giving the disks to the guests.
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