RNDU4000 won't expand

[PeeDeePee]

I replaced 2x 1.5TB with 2x 3TB drives and the unit won't auto expand. the other slots have 2x 4TB.

Volumes rebuilt fine, but didn't expand.

Is there a way to force expand? Or to get the system to check for the disks and begin the process?

[StephenB]

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@PeeDeePee wrote:

I replaced 2x 1.5TB with 2x 3TB drives and the unit won't auto expand. the other slots have 2x 4TB.

Volumes rebuilt fine, but didn't expand.

That is as designed.  You'd have needed to upgrade with 4 TB drives in order to expand.

You could try to exchange the disks for 4 TB models.  Or if you have a backup, you could do a factory default with all disks in place.  That you get you the full use of all disks.

[PeeDeePee]

Thats odd - those 1.5 TB I replaced auto expanded when i used them to replace the 500GB drives that were in there. Is there a reason it didn't happen again?

[StephenB]

Vertical expansion only works if the new drives are at least as big as the biggest drives in the system.

What drive mix did you have when you upgraded the 500 GB drives to 1.5 TB drives?

[PeeDeePee]

2x500, 2x4tb

[StephenB]

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@PeeDeePee wrote:

2x500, 2x4tb

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Yes.  So you needed to upgrade the 500gb drives to at least 4 TB.  In-between sizes won't work.