SCSI target and IO-throttling

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Hello

Could anyone advice how a SCSI target device can IO-throttle its initiators, i.e. prevent them from queuing too many commands, please?

I suppose, the best way for doing this is to inform the initiators about the maximum queue depth X of the target device, so any of the initiators will not send more than X commands. But I have not found anything similar to that on INQUIRY or MODE SENSE pages. Have I missed something? Just returning QUEUE FULL status doesn't look to be correct, because it can lead to out of order commands execution.

Apparently, hardware SCSI targets don't suffer from queuing overflow and don't return all the time QUEUE FULL status, so the must be a way to do the throttling more elegantly.

Regards,
Vlad
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