Some benefits of using catalogs for upgrades/PTFs on only one box would be:
-All your CD swapping/loading time is done in advance rather than during
downtime (some downtime savings on the upgrade)
-You are reading thru the entire CD by copying it to the IFS in advance
(and thus will probably find any drastic media errors in advance of an
upgrade)
-Not having to physically handle 10+ upgrade CDs and probably 10+ more
cume/group CDs is MUCH less hassle during an upgrade!
-If you've ever had to go back through a set of cume/group CDs because an
error occurred at the end of the process, the reloading process from
catalogs goes much quicker than from CD
-With a HMC and image catalogs it is possible to complete an upgrade
without physically being next to the machine the whole time and
'babysitting' the process
I wasn't sold on the catalogs until actually trying them after taking a
Common session this year... I will continue to use them and was pretty
impressed with the whole setup. It also seems more and more that IBM
service is pushing the image method of delivery. I can see wanting to have
a hardcopy of the CDs around for later also, though... I cleaned up the
images pretty quickly after our upgrades. For most modern boxes with 8
drives or so, a full set of i5/OS upgrade media, cume, and other groups
doesn't take up too much space that it's a concern during an upgrade.
Scott Klement
<midrange-l@scott
klement.com> To
Sent by: Midrange Systems Technical
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cc
07/24/2007 12:18 Subject
PM Re: burning v5r4 cumulative ptfs to
cd
Please respond to
Midrange Systems
Technical
Discussion
<midrange-l@midra
nge.com>
Hi Jerry,
Others are probably going to suggest this, but here goes. I just
created an image catalogue and downloaded them straight into the IFS (a
mapped drive in Windows).
Sorry if this is a dumb question, but... do image catalogs make sense
if you have only one machine to install to? I see people discuss them
frequently on this and other forums, but I really don't understand the
point. Why waste gigabytes of disk space on CD images when you can just
load the PTFs directly from the CD?
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