Mike, 

The DASDFMT corrected this problem.  Thanks!

-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Michael 
MacIsaac
Sent: Tuesday, December 07, 2010 1:58 PM
To: [email protected]
Subject: Re: Red Hat 6 Installation on DASD

William,

> The installation fails with the window "Formatting failed":
I think this is a bu... um, a "known issue" :))

In the draft RHEL 6 Virtualization Cookbook, we write:

Important: If the minidisks 100-102 (dasdb-dasdd) have not been formatted 
for Linux by dasdfmt before this install, you should see a screen as shown 
in Figure 7-5 on page 112. However, there is a known issue in RHEL 6 
whereby this screen is not shown and you don’t have the ability to format 
the disks through the installer. If you proceed without formatting the 
disks with dasdfmt, the install process will fail later.

If this is the case, it is recommended that you perform the following 
steps:

-) Start a second SSH session, this time logging is as root. 
-) Issue the command lsdasd. 
... (dasdb - dasdd shown)
-) Format the minidisks in parallel with the following for loop:
# for i in b c d
> do
>   dasdfmt -b 4096 -y -f /dev/dasd$i &
> done

See the top of http://www.vm.ibm.com/devpages/mikemac/ for the draft.

(The issue seems to be related to the fact that it's difficult to tell 
when a disk needs to be formatted by looking at /proc/dasd/devices, and 
other such files).

"Mike MacIsaac" <[email protected]>   (845) 433-7061

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