[SCALE 24.10.2.2] Is it Possible to Manually Set Custom iSCSI Extent Block Size?

TrueNAS General
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1

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Hello!

Is it possible to somehow specify a value for the Logical Block Size that isn’t listed in the dropdown menu? Maybe via the API?

For example: 8192b

2

Probably no?

Never heard of a device with a logical block size of 8192, only ever 512 or 4k.
Is there such a thing?

3

Some modern SSDs have 8k physical block sizes and benefit from setting ashift=13 (8192b), yes.

But I’m talking about an iSCSI virtual block device, so that’s not really relevant. I’m just trying to figure out if I can customize the extent block size beyond what’s in the dropdown menu in a supported way.

4

I don’t think you can.

You could make a feature request.