Re: OS400 DATA MIGRATION

[Larry Bolhuis <lbolhuis@xxxxxxxxxx>]

Dare,

  To do this you need to go into DST, Work with DIsk Units, and remove
the units in question from the ASP. You didn't specify but it sounds
like you have a 5052 'top hat' with 10-4G drives and 6 open slots.
Additionally it sounds like a mirrored pair of 4's in the base unit. So
if you are at 92% full now of a (calculated) 41.9G then you have 38.58G
of data. When you remove the 2 drives you will have only 33.52G of
storage.  This means that in order to have enough space you will need to
remove Mirroring AND Stop Raid protection to have enough space to drop
those drives without overflowing. Even then you will need to set your
ASP storage limit to near 100% or DST won't let you do it. Being that
full it'll take some time for sure! And of course if you lose a drive
during that time, it's bye bye data!

  So Dare, howz your tape drive working???  I think that in your
situation I'd back up your entire system, clean the drive and repeat.
Then I'd clear the data from ASP 1, Kill raid and mirroring, remove the
drives, do the hardware stuff, re-enable Raid, re-enable Mirroring, add
all the drives to the ASP and reload the system. You'll get a balanced
load that way too.

  My .02.

  - Larry

ps I haven't done one of these since, um, Saturday?

> oludare wrote:
> 
> Hi guys,
> 
> I'm on V3R7M0 and running about 92% DASD usage.
> What do I need to know to perform DATA MIGRATION. I need to perform
> DATA MIGRATION before IBM CE come in for hardware upgrade.  I'm
> planning DASD upgrade and need to remove 2 X 4gig old drive from a
> RAID set then add
> 7 X 8.58gig more to the raid set (Raid has 16 arms).  I need to get
> all data on 2 old drive spread out on the remaining
> 8 X 4gig before hardware upgrade by CE.  The 2 X 4gig DASD will be
> added to bottom mirrored 2 X 4gig.  At the end I should have 8gig
> Mirrored and a little above 92Gig on the Raided top 15 drives.
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