Re: Puzzling System Action

[Dave Mahadevan <mahadevan@xxxxxxxx>]

Alexey:

> 1) When you start mirroring on ASP, which contains RAIDed drives, system
> will consider RAIDed drives already proctected and will leave them alone.
> Only non-RAID protected drives will be paired.
> In other words, if you have ASP containing only RAID-protected drives,
> starting mirroring for them will not change anything.
> If you really want mirrored protection, stop RAID-protection for drives in
> ASP, and then start mirroring.
>
Ok I understand.  Stupid question:  How am I protected when the
subsystem goes down?  I  switched off one of the subsystems.   Jobs
accessing libraries in the RAID freezes and the system reports a missing
disk with A6xx0244.  Interesting behaviour.   I guess the protection is
only on the unit level within the subsystem.  Pardon my ignorance, why
cant RAID systems be mirrored?

> 4 and 5) QDBJRN (in QRECOVERY) is an internal system journal, which
> protects system dictionary files (QADBxxx). System takes care of this
> journal automatically, so normally user does not need to do anything about
> it. If you want to reset sequence numbers, try to do it in a restricted
> state.
>
Is resetting really necessary?  How high can the sequence numbers go?

> 6) When SMAPP is active (EDTRCYAP), system may write internal - invisible -
> entries to journals. These entries record changes to not-journaled access
> paths.These entries cannot be accessed by user, but they do consume
> sequence numbers.
>
>
You lost me here.   Maybe a little more explanation or a manual
reference?  Thanks.

> Best regards
>     Alexey Pytel
>

--
Thank You.

Regards

Dave Mahadevan.. mailto:mahadevan@fuse.net


+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---