Compellent ODX MPIO error 6.7.2 & 6.7.11
Physical reaction of the SAN when ODX problem happend.
Get MPIO error when ODX enable on W2k12 server since version 6.7.2.
The CoPilot technical service alert tell resolution for ODX 6.10.x tell:
"Windows Server 2012 requests an Extended Copy between a source volume which is unknown to the Storage Center and a volume which is presented from the Storage Center."
The ODX problem we encounter is only happening for us on the san itself no other party or drive/volume.
We are using recomment storage hardware profile between tier1 SSD and tier3 NL-SAS.
We never should see write on the NL-SAS drives with the current setting except when the SAN is doing data progression that happend at night.
When this ODX mpio error happend on W2k12 R2 happend I get CSV locked. We can see write on the SSD tier at 50Mb/sec but get also Write on NL-SAS drive at 200Mb/sec overdriving the NL-SAS.
No IO for iSCSI trafic, server, storage profile but lot of IO trafic on SAS cable between the 2 tiers.