Hello Jinhu, such a question is not for the "NAS community" - you should really open a case with the GSC to ask for assistance to help guide you thru whatever is occurring. I see you have an "active" in SalesForce, so this is the best way to proceed.
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Albert Hagopian
Hitachi Vantara
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Original Message:
Sent: 07-05-2025 01:56
From: Jinhu Song
Subject: The SD has grown from X bytes to Y bytes since span COD was written. The extra space will be wasted.
Is there a command that you can shrink LUN without destroying the data on it?
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Jinhu Song
HDSFC1066
Original Message:
Sent: 07-03-2025 08:28
From: Albert Hagopian
Subject: The SD has grown from X bytes to Y bytes since span COD was written. The extra space will be wasted.
Apologies, for some reason I lost access to this forum and hopefully am now back to receiving mails.
When a DPVol is presented to the VSP One File 30, the server inventories the SD and knows the capacity of the DPVol. As part of this, a signature is written to each DPVol (this is CoD) and thus "expansion" of a DPVol is not a supported task.
It appears someone "thought" that they could perform a LUN expansion and the server would allow the extra space. Unfortunately, that is not the case. and the LUN needs to be shrunk back to the exact block size pre-expansion.
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Albert Hagopian
Hitachi Vantara
Original Message:
Sent: 03-29-2025 12:19
From: Jinhu Song
Subject: The SD has grown from X bytes to Y bytes since span COD was written. The extra space will be wasted.
Hi,
I am taking over an old HNAS, and got email of this error msg about all the SDs in the span.
What is the command or document to solve this problem? Thanks in advance.
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Jinhu Song
HDSFC1066
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