What is cbb0 drive?

[portatip]

Hi,

I use Zabbix 6.2 and default SNMP template for monitoring my TrueNAS core 13.0-u4 server.
Zabbix finds a disk called cbb0. I can't find any information about this disc on the Internet. In my configuration, there is only one pool and one iscsi share, which is used as a vmware datastore.

When I migrate a virtual machine from this datastore (Reading), the utilization of this cbb0 disk reaches 100% and stays constant. The remaining disks are used somewhere by 40-50%.
My configuration is pretty simple:
1vdev data
2vdev l2arc
1 hot spare.

Can someone tell me what is cbb0 disk? Thanks

 

[Patrick M. Hausen]

Code:

$ man cbb
PCCBB(4)               FreeBSD Kernel Interfaces Manual               PCCBB(4)

NAME
     pccbb – cardbus bridge driver

SYNOPSIS
     device cbb
     device pccard
     device cardbus
     device exca

DESCRIPTION
     The pccbb driver implements the Yenta specification for CardBus bridges.
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