David, thank you for the detailed help.  I cannot make it work without the 
directory entry for VDISK under either method, BUT it works fine as long as my 
VDISKs are defined.

directory

USER LNX050 PGDN50 512M 512M
INCLUDE LINDFLT
MDISK 191 3390 0001 0500 L5001A MR READ WRITE MULTIPLE
* ISK 201 3390 0501 1500 L5001A MR READ WRITE MULTIPLE
MDISK 202 3390 2001 8016 L5001A MR READ WRITE MULTIPLE
MDISK 203 FB-512 V-DISK 409600  MR READ WRITE MULTIPLE
MDISK 204 FB-512 V-DISK 2097152 MR READ WRITE MULTIPLE

Profile exec

ADDRESS COMMAND
'CP SET PF11 RETRIEVE FORWARD'
'CP SET PF12 RETRIEVE BACKWARD'
'CP SWAPGEN 203 409600 ( REUSE FBA'
'CP SWAPGEN 204 2097152 ( REUSE FBA'

Q dasd

DASD 0190 3390 540RES R/O        107 CYL ON DASD  5015 SUBCHANNEL = 000B
DASD 0191 3390 L5001A R/W        500 CYL ON DASD  5016 SUBCHANNEL = 0000
DASD 019D 3390 540RES R/O        146 CYL ON DASD  5015 SUBCHANNEL = 000C
DASD 019E 3390 540RES R/O        250 CYL ON DASD  5015 SUBCHANNEL = 000D
DASD 0202 3390 L5001A R/W       8016 CYL ON DASD  5016 SUBCHANNEL = 0001
DASD 0203 9336 (VDSK) R/W     409600 BLK ON DASD  VDSK SUBCHANNEL = 0002
DASD 0204 9336 (VDSK) R/W    2097152 BLK ON DASD  VDSK SUBCHANNEL = 0003
DASD 0592 3390 540RES R/O         70 CYL ON DASD  5015 SUBCHANNEL = 000E







-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of David 
Boyes
Sent: Wednesday, October 05, 2011 4:28 PM
To: [email protected]
Subject: Re: VDISK Swap

>MDISK 203 FB-512 V-DISK 409600  MR READ WRITE MULTIPLE
>MDISK 204 FB- 512 V-DISK 2097152 MR READ WRITE MULTIPLE

Yes, those statements define the VDISKs, but they don't make them usable by 
Linux. See my other posts on how to take those and put a swap signature on them 
so Linux knows how to use them. 

In your case above, you would have two invocations for SWAPGEN: 

SWAPGEN 203 409600 ( REUSE FBA
SWAPGEN 204 2097152 ( REUSE FBA

You need REUSE because SWAPGEN will refuse to overwrite pre-existing disks 
without it.

You can also let SWAPGEN define the disk for you (instead of putting them in 
the CP Directory) by removing the MDISK statements for the VDISK from the CP 
directory entry, and just using:

SWAPGEN 203 409600 ( FBA
SWAPGEN 204 2097152 ( FBA

SWAPGEN will define and format the swap disks all by itself. If you use my 
example, put these in the <userid> EXEC file so it's customized for each guest. 

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