[Info-vax] Reconfiguring VMS 6.2 - Shadow set question

[Stephen Hoffman]

On 2012-10-21 22:28:00 +0000, supervinx said:

You will want to include some basic information in your questions.

For starters, what OpenVMS version(s) are involved?

Is this a cluster?

If so, are there disks with these device names (DKA100, DKA200, DKA300, 
DKA400) on both hosts?

What are the allocation classes of each of the hosts involved?

If there are disks with these disk device names on both (or multiple) 
hosts, what is the storage interconnect involved?

If you have not already done so, please go read the shadowing manual.  
That's available at <http://www.hp.com/go/openvms/doc>

In general, do not use the host allocation class 1 for anything other 
than fibre channel devices.


> $ mount dsa0: /shadow=($1$dka100:,$1$dka200:) /system  V47701_sys
> %MOUNT-I-SHDWMEMSUCC, _$1$DKA100: (V47701) is now a valid member of the 
> shadow s
> et
> %MOUNT-I-SHDWMEMFAIL, $1$DKA200: failed as a member of the shadow set
> -SYSTEM-W-NOSUCHDEV, no such device available
> 
> -----------------------------------------------------------------------------
> 
> $       mount dsa1: /shadow=($1$dka300:,$1$dka400:) /system  Oracle
> %MOUNT-I-MOUNTED, ORACLE mounted on _DSA1:
> %MOUNT-I-SHDWMEMSUCC, _$1$DKA300: (V47701) is now a valid member of the 
> shadow s
> et
> %MOUNT-I-SHDWMEMFAIL, $1$DKA400: failed as a member of the shadow set
> -SYSTEM-W-NOSUCHDEV, no such device available
> 
> -----------------------------------------------------------------------------
> 
> V47701: sho dev
> 
> Device                  Device           Error    Volume         Free  
> Trans Mnt
>  Name                   Status           Count     Label        Blocks 
> Count Cnt
> DSA0:                   Mounted              0  V47701_SYS      863790  
>  323   1
> DSA1:                   Mounted              0  ORACLE          390150  
>   17   1
> $1$DKA100:    (V47701)  ShadowSetMember      0  (member of DSA0:)
> $1$DKA300:    (V47701)  ShadowSetMember      0  (member of DSA1:)

That's not the full output from that command; I'm going to assume the 
command or the output (or both) was edited.

> 
> -----------------------------------------------------------------------------
> 
> DKA200 and DKA400 are missing.

Um, did these devices ever exist?  If they did, then the question then 
becomes "where did they go?", and the information that's been provided 
here isn't enough to determine that.

> So:
> 1) Can I remove the shadow sets ? The first involves the system disk ...

Remove them?   They're not part of the shadowsets.

> 2) Or it's better and safer to remove only DKA200 and DKA400 from the shadow ?

The "failed" volumes are not in the shadowsets.

Please post the output from the SHOW DEVICE D command.  Or if your 
OpenVMS configuration is new enough to support this command, please 
post the output from SHOW SHADOW DSA0: and SHOW SHADOW DSA1:



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