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EMC VNX alert regarding auto-tiering & relocation

Dear Friends,

Need some inputs on below error.

Time Stamp 09/22/15 09:00:01 Event Number 712d841a Severity Error Host A-IMAGE Storage Array CKM00122901163 SP N/A Device N/A Description Internal Information Only. Could not complete operation Relocate 0xB0007249C Cancelled CBFS status 0x26 because  0xe12d8426.

00000400 03002c00 d3040000 1a842de1 1a842de1 00000000 00000000 00000000 00000000 00000000 712d841a

I understand the cause and resolution (below) however I have some further questions at the end of the message.

Cause :

1.The messages/cancellations occur when the window for Auto Tiering ends and there are still relocations left in the queue

2.this cancellation occur While attempt to move (Relocating)the data from one tier to another tier and there are still relocations left in the queue .

This Is happen  as per the design

Resolution :

1.       Ignore the alert as its is not critical , It will relocate the data in next relocation .

2.       Expand the pool  so that the tier consumption will reduced to 90 % and data will start relocation without fail .

3.       Manually  move the  data  from extreme performance tear to capacity tier

4.       Increase your relocation duration time or schedule another relocation window for the remaining slices which were aborted due to the relocation window expiring.

Questions:

1.       Ignore the alert as its is not critical , It will relocate the data in next relocation .--> how can we check what data did not relocate before and if it has been relocated in the next move or not ? Is it really wise to ignore this alert.

2.       Expand the pool  so that the tier consumption will reduced to 90 % and data will start relocation without fail --> If pool subscription and allocation is under control and have a lot of free space, does this point still hold valid ?

3.       Manually  move the  data  from extreme performance tear to capacity tier --> How can this be possible from GUI or CLI ? What is data needs to be moved up the tier ?

4.       Increase your relocation duration time or schedule another relocation window for the remaining slices which were aborted due to the relocation window expiring. --> We have an 8 hour relocation window. How can we decide what time window to choose and if that is appropriate or not and whether to reduce or increase that window ?

5. what does the bold codes refer in alert ?

Could not complete operation Relocate 0xB0007249C Cancelled CBFS status 0x26 because  0xe12d8426. ?


6. Can we explicitly only disable this alert from notification template without disabling the other alerts?


Thanks,

Yuvik

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