RE: How to add/drop SCSI drives from within the driver?

[Mukker, Atul]

> > 8. So, all driver has to do to assist applications is to 
> provide the 
> > logical drive number to scsi address mapping. Application 
> would say, 
> > hey! I added/removed logical drive number 5, driver 
> reverts, here is 
> > the scsi address for it "host:2, channel:5, target:5 lun:0" :-)
> 
> How does the driver supply the mapping if it does not know 
> about the "change"? Is it reserving or telling user space the 
> hctl that will be used?
This point was thoroughly explained in my previous post item 2. Yes, driver
reserves a virtual bus on which all logical drives would be exported.

> 
> If so, why can't the driver call scsi_add_device(h,c,t,l) 
> after the ioctl to create the logical drive completes?
This idea was already turned down, see mails on linux-scsi on 12/3

> 
> Though I am all for using hotplug to initiate scanning from 
> user space.
good
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