RE: Converting RAID Striping from 4Disks to 8Disks

By ending RAID protection it's freeing up the areas on the 4 disks used
for parity protection, then by starting it across 8 drives it allocates
space on all 8 disks.  Space should obviously be immediately available
on the 4 you just stopped RAID protection on, but it may need to move
data around from the other 4 disks before it can activate RAID.
When you restart RAID it should ask you to select the disks to spread
parity over (4 or 8).


Neil Palmer                                AS/400~~~~~      
NxTrend Technology - Canada   ____________          ___  ~     
Thornhill, Ontario,  Canada   |OOOOOOOOOO| ________  o|__||=   
Phone: (905) 731-9000  x238   |__________|_|______|_|______)   
Cell.: (416) 565-1682  x238    oo      oo   oo  oo   OOOo=o\   
Fax:   (905) 731-9202       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
mailto:NPalmer@NxTrend.com    AS/400  The Ultimate Business Server      
http://www.NxTrend.com

> -----Original Message-----
> From: Larry Bolhuis [SMTP:lbolhui@ibm.net]
> Sent: Monday, June 08, 1998 5:39 PM
> To:   MIDRANGE-L@midrange.com
> Subject:      Re: Converting RAID Striping from 4Disks to 8Disks
> 
> Neil,
> > 
> > I believe you need to go into Dedicated Service Tools during Manual
> IPL
> > and Work With Disk Configuration.
> > Obviously can't do that right now, but the 'switch' should be a DST
> > option when working with Disk ASP.
> > Not sure what manual it's in - possibly Backup & Recovery.
> 
>   I checked B&R (again) and all I can find is what I already knew:  Go
> to DST (Requires IPL of course) End Raid protection (Requires Ending
> Mirroring all but the newest AS/400e boxes) Then restart Raid, (and
> Restart Mirroring).  And besides all that (which WILL take some time)
> it
> never actually says that it will convert a 4-set to and 8-set.  It
> seems
> from one of my previous passes through this process that if the drives
> were ever in a Raid-set they retain the previous attributes (as in we
> got a 4-set again).
> 
>   None of this qualifies as a 'Simple command in OS/400'.
> 
>   Larry Bolhuis
>   Arbor Solutions, Inc
>   lbolhui@ibm.net
> 
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