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A DDF Session Exists
Trying to provision space from our DMX-4. Was chugging along with no problems, then suddenly:
./symconfigure -cmd "form meta from dev 0031 config=striped, stripe_size=2cyl; add dev 0032:0033 to meta 0031;" commit
Establishing a configuration change session...............Established.
Error occurred while Defining change number 1:
A DDF session exists. Operation cannot be performed
Device 0031 generated the failure
Terminating the configuration change session..............Done.
The configuration change session has failed.
Does it on any device, not just 0031. Stuck now. Any assistance would be great. Thanks.
markdf
76 Posts
0
June 5th, 2013 12:00
EMC support answered my question... so this is for anyone that comes across this.
Basically the devices were locked in a DeltaMark session. You can list devices locked in a DeltaMark session by issuing:
bash-3.2# ./symchg list -session
Symmetrix ID: 000190XXXXXXX
C H A N G E T R A C K E R D E L T A M A R K S E S S I O N S
Device Name Directors Device
--------------------------- ------------- -------------------------------------
Cap
Physical Sym SA
DA :IT Config Attribute Sts (MB)
--------------------------- ------------- -------------------------------------
Not Visible 003D ???:? 01B:C5 RAID-5 N/Grp'd RW 35723
Not Visible 003E ???:? 16B:C4 RAID-5 N/Grp'd RW 35723
Not Visible 003F ???:? 16A:D2 RAID-5 N/Grp'd RW 35723
Not Visible 0040 ???:? 01A:D3 RAID-5 N/Grp'd RW 35723
Not Visible 0041 ???:? 16A:D0 RAID-5 N/Grp'd RW 35723
Not Visible 0042 ???:? 01A:D1 RAID-5 N/Grp'd RW 35723
Not Visible 0043 ???:? 16A:D6 RAID-5 N/Grp'd RW 35723
Not Visible 0044 ???:? 01A:D7 RAID-5 N/Grp'd RW 35723
Not Visible 00D1 01C:0 01A:C0 2-Way Mir N/Grp'd RW 3
Not Visible 00D2 01C:0 16A:D0 2-Way Mir N/Grp'd RW 3
10 Change Tracker DeltaMark sessions were found.
As long as you know it's safe to do so, you can end the DeltaMark session on the device by:
bash-3.2# ./symchg delete dev 003D
A Change Tracker DeltaMark session has been deleted for Symmetrix Device 03D
You may now provision (or meta) the device without complaint.
Primus ID: emc271365 covers this error/behavior and offers corrective steps (though for the life of me, I can never search for nor find EMC Primus articles anywhere in Powerlink or any of the other support resources).
AranH1
2.2K Posts
0
June 7th, 2013 09:00
That article came up pretty quickly in a search on support.emc.com. I just went to support.emc.com, searched on "A DDF session exists. Operation cannot be performed" and the article was the only result.
One hint to searching on support.emc.com is that if you are searching on an exact error message use quotes like I did above on the error message and it will search on that exact phrase. Otherwise the search results search on all the words and even combinations of the words.
For example if I perform the search without the quotes the first results are about Data Domain issues with ddfs.