RE: Disk replacement for DUMMIES

["Carl Galgano" <cgalgano2@xxxxxxxxxxxxxxxxx>]

One other question about RAID5.  I have another AS400 here that has 4
drives in it, but there is no RAID5 controller in the box.  The machine
is at about 30% used as far as DASD goes.  I have a RAID5 card for it.
Can I just put the card in, and then set up the raid pool in SST/DST, or
do I need to reload the system?
cjg

Carl J. Galgano
EDI Consulting Services, Inc.
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-----Original Message-----
From: midrange-l-admin@midrange.com
[mailto:midrange-l-admin@midrange.com] On Behalf Of Philipp Rusch
Sent: Wednesday, April 17, 2002 5:56 PM
To: midrange-l@midrange.com
Subject: Re: Disk replacement for DUMMIES


Hello Carl,
first, don't worry about the data on the failed drive, it will be
rebuilt from the redundant information of the other drives in the RAID
set. The only thing you must manually take care of is the failed drives
"hardware object" should be removed from the configuration, otherwise it
will stay there in the config info for ever ... sounds more complicated
than it is in reality. OK, step by step: you got a new drive, you
planned a downtime, you power down your system. Identify the failed
drive, take out the old drive and put in the new one, then power up
again in manual mode (IPL from  B M). Go to DST and sign on as QSECOFR,
not 11111111 and not 22222222. Go to the "work with disk units" menus,
"work with disk configuration" and then "work with device parity
protection" (this is RAID-5 in AS/400 terms) There you start your RAID
protection again. If this has been completed, you add the new unit to
your ASP and look at the resulting config and now you got to look for a
drive missing from config (the old one). Remove it. Then exit DST and go
on with the IPL. System should be running normal as before. Switch IPL
mode back to normal and THAT 'S IT !

HTH, regards from germany, Philipp Rusch