So for backup purposes it is a good idea to use the minidisks (with the
cache turned off).  

Something like this:  MDISK 200 3390 001 3338 lnx710 MR ?

Thanks,


Ryan Stewart
Indian River Community College

-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Romanowski, John (OFT)
Sent: Wednesday, July 26, 2006 1:31 PM
To: [email protected]
Subject: Re: MDISK vs DEDICATED DASD

Not to throw you a curve but you could sort of do both at the same time:
In the guest's  USER DIRECT definition, instead of  DEDICATE vdev rdev
Which would dedicate the whole rdev dasd device to the guest but then
your  backup utility can't LINK a DEDICATE-d device for backups,

You could instead do
MDISK vdev DEVNO rdev ....

That way the guest has the whole device independent of its volid (like
DEDICATE) plus your backup utility can LINK the vdev MDISK for
backup/restores.  To protect CP at IPL-time from the potential for
duplicate volid issues you would have all the DEVNO rdev's
OFFLINE_AT_IPL and have AUTOLOG1's PROFILE EXEC VARY ON rdevx-rdevy 


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-----Original Message-----

From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Ryan Stewart
Sent: Wednesday, July 26, 2006 1:08 PM
To: [email protected]
Subject: MDISK vs DEDICATED DASD

Hi all,

Wondering if anyone can tell me whether or not there is an advantage or
a reason or a disadvantage to using MDISKs for Linux servers if I intend
to turn off the MDC, verses using dedicated disks.  I intend to use the
entire disks and not split them up.

Thanks in advance.

Ryan Stewart
Systems Programmer
Indian River Community College
[EMAIL PROTECTED]
772-462-7310


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