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M1nd3
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Contributor
‎09-24-2021 07:36 AM
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vSAN creation

Hello everyone, this might be silly question, but is it possible to use one disk for both flash and storage for vSAN? For example i have 1 TB disk, could i split it let say to 100GB for flash and leave the rest for the storage? If yes, is it possible to do it with sphere web client? Thank you for your help.

Kind Regards,

MIndaugas

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TheBobkin
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‎09-24-2021 08:42 AM
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@M1nd3, No this is not possible as each vSAN device (e.g. Cache-tier drive, Capacity-tier drive) is only claimable as a single unpartitioned device and obviously only claimable once and not claimable again once there are vSAN partitions on it.

 

As an aside (but only for informational purposes and not something that should be attempted), NVMes can be carved out differently via their namespace functionality which basically allow a single devices to be split up and presented as multiple devices - this is NOT supported in vSAN currently but may be in the future (as streams of vSAN like VMC can use this).

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TheBobkin
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‎09-24-2021 08:42 AM
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@M1nd3, No this is not possible as each vSAN device (e.g. Cache-tier drive, Capacity-tier drive) is only claimable as a single unpartitioned device and obviously only claimable once and not claimable again once there are vSAN partitions on it.

 

As an aside (but only for informational purposes and not something that should be attempted), NVMes can be carved out differently via their namespace functionality which basically allow a single devices to be split up and presented as multiple devices - this is NOT supported in vSAN currently but may be in the future (as streams of vSAN like VMC can use this).

IRIX201110141
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‎09-26-2021 05:51 AM
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Not in a supportet way.

But if you have a real oldschool RAID Controller you can create a RAID0 with that single device and place 2 virtual Volumes(RAID speak) on that diskgroup. One or both LUNs can be tagged as SSD later within the vSphere Client. Again... thats just for testing and messing around and not for production or supported in any way!

Regards,
Joerg