Freenas does not see more than 15 disks

awalujkar

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Jul 30, 2020
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We tried to add a 16th disk on vmware because the disk pool is full. From the freenas console, it does not see the newly added scsi controller and the 16th disk as well. Is this a limitation to number of scsi cards? If so, how can we expand the storage if we are running out of space with 15 disks already. Please advise. Thank you in advance!
 

Z80user

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Jun 13, 2020
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is one of the limitations on SCSI, at least old SCSI used 16 bits as the ID (only one active at the time) to know the devices, and the host is one of them, happen the same with other SCSI but with 31 devices+host, not sure if was something like that but with only 7 devices but is very old thecnology (I still have one SCSI controller of 8 bits)
so if you want to add more devices you will mush add another SCSI controller to the system to get access to more disks, not sure about the specific limitation/build of the VMware, but that is how it work in real life.
 

sretalla

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It seems to me that you're set up for trouble if that's a production system... passing through VHDs to FreeNAS with virtual SCSI adapters is the way to lose all your data.

If I'm reading you incorrectly and you're following the advice from this article:

Then it should just be a matter of setting the second physical SCSI adapter to passthrough to the VM.

The limits on SCSI adapters will not be on the FreeNAS side... there are folks with 4 or more I have seen around the forums here.
 
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