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In this Document

Symptoms

Cause

Solution

References

Created from <SR 3-7947792851>

Applies to:

Symptoms

Unable to re-mirror volume after it cracked

We have primary NAS <source> with volume <volume name> and this was mirrored to NAS <target>.

After the mirror broke or "cracked" .  The mirror was deleted and then a re-mirror was attempted via GUI but this failed with the following status:

'Unable to attach parts'.

and

Error seen in the syslogs:

 
Via the GUI:

Also if you deleted the mirror set on the <source>  and deleted the mirror volume on <target> and then tried to re-mirror the same error occured.

Note that the following message in the system events log  'nbd: Could not locate nbd connected disk for dasd id xxxx.

Other symptoms : On the <source> the volume is composed of two partitions of xxxMB and xxxMB. Before deleting  the mirror volume on the <target> NAS it was identical to the <source> NAS i.e. two partitions.

Now you can see only one xxxxMB partition <target>.  The other partition that was part of the volume shows as being 'free to allocate'.

Cause

The target had "stale " data about the mirror volume in question.

Solution

The mirror was successfully re-made after a reboot of the target NAS

*** Currency check - 03-JUN-2015 ***

*** Currency check - 02-NOV-2017 ***

References

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