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

From: Mukker, Atul
Date: Thu Dec 09 2004 - 12:42:17 EST

> > 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.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at