Thanks Alan.
In the EXTENT CONTROL, DIRMAINT requires regions to be specified in group
definition, not vol ids.
00081 *GroupName RegionList
00082 GRPLNX (ALLOCATE ROTATING)
00083 GRPLNX LINUX01 LINUX02 LINUX03 LINUX04 LINUX05 LINUX06 LINUX07
__________________________________________
Ranga Nathan / CSG
Systems Programmer - Specialist; Technical Services;
BAX Global Inc. Irvine-California
Tel: 714-442-7591 Fax: 714-442-2840
Alan Altmark <[EMAIL PROTECTED]>
Sent by: Linux on 390 Port <[EMAIL PROTECTED]>
11/30/2004 10:26 PM
Please respond to Linux on 390 Port
To: [EMAIL PROTECTED]
cc:
Subject: Re: DIRMAINT questions - how to add volumes
On Tuesday, 11/30/2004 at 05:12 PST, Ranga Nathan <[EMAIL PROTECTED]>
wrote:
> DIRMAINT has this concept of regions and groups for DASD.
> I am confused about the 'region'. According to the documentation, each
> volume is to be associated with a unique region in the region table in
> EXTENT CONTROL. Then why have a region?
>
> When I started DIRMAINT, I declared only 10 volumes. I then tried to
add
> more using DIRM DASD ADD .... I tried add 'region volid', or just
'volume
> volid' - neither worked.
>
> We had to add to $ALLOC$ for DIRMAINT to recognize the volumes. But then
> he thought that 3390 - 3 had only 1112 cylinders....!!!
>
> There must be a user-friendly way to add volumes to groups/regions at
any
> time.
>
> Unfortunately the DIRMAINT command manual was not of much help.
>
> I would appreciate if someone could point me to a good primer on
DIRMAINT.
> I need to go to a quiet place and figure this out :-)
Regions are specific areas of the disk. Don't worry about them. It was a
useful concept on old-style disk devices where controlling data location
physically on the disk had performance implications. Not any more.
A group is a named collection of volids (volume names).
Every volume (and group, if you have them) must be in EXTENT CONTROL. You
can dynamically update EXTENT CONTROL by using DIRM SEND EXTENT CONTROL,
(receive and update the file), DIRM FILE EXTENT CONTROL, and DIRM RLDEXTN.
Thanks, that was useful.
Alan Altmark
z/VM Development
IBM Endicott
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