Re: Data transfer across disks.

[KirkG@xxxxxxxxxxxxxx]

First, since you are only adding "3" 6824, I will assume that you already 
have at least 4 other 6824s in a RAID set. Remember you need at least 4 to 
do RAID on the AS/400.

Once the new drives are physically installed you will need to ADD then to 
an existing RAID set or create a new set. Once in the RAID set you can ADD 
them to the ASP. Now they are usable to OS/400.

Now "REMOVE" the 9337s from the ASP they are in. This will Migrate all the 
data off them leaving them non-cfg'd.
        NOTE: With 3 or 4 "empty" drives in the system all that data will 
go new drives. So you will be reducing the arms that data is on.

Once that is done you can add the 9337s back in to your new ASP.

Time? Well that's a good question. Depending on what CPU you have and the 
data on the drives 8 plus hrs. would not surprise me. If you have a good 
fast tape drive. It might be faster and would be better for over all data 
spread to test your Backup and Recovery scheme. By that I mean, backup 
everything to tape wipe the system clean, added the new drives and 
restore.

Hope this helps

---------------------------------
Kirk Goins
IBM Certified AS/400 Technical Solutions
DataMirror High Availability Certified
Pacific Information Systems - An IBM Premier Business Partner
503-674-2985             kirkg@pacinfosys.com
"WE KNOW TECHNOLOGY"
---------------------------------





"Carley, Neil" <carleyn1@Midas-Kapiti.com>
Sent by: owner-midrange-l@midrange.com
11/30/00 05:19 AM
Please respond to MIDRANGE-L

 
        To:     "'MIDRANGE-L@midrange.com'" <MIDRANGE-L@midrange.com>
        cc: 
        Subject:        Data transfer across disks.


Hi all,

Next week I plan to add 3 new #6824 disks to out 720 (V4R3) in an attempt 
to
remove 24 old #9337's from our main ASP config, I will be keeping the old
disks to create a second ASP for non business critical data.
My question's are : when I come to move the data off the 9337's across to
the rest of the disks what exactly is involved, will I have to suspend 
RAID,
do I have to do 1 tray of disks (i.e. 1 parity set) at a time ?
SST shows 2 parity sets of 8 disks each and 2 parity sets of 4 disks each.
Also any guesses on how long it will take to transfer the data across, the
disks are about 85% full at present
Also if there's anything I haven't thought of !!!

Any help or advice greatly appreciated

regards

Neil 
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