Messages in this thread | | | From | V13 <> | Subject | Re: PATCH: cdrecord: avoiding scsi device numbering for ide devices | Date | Sat, 7 Aug 2004 13:31:34 +0300 |
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On Saturday 07 August 2004 02:15, Martin Mares wrote: > Hello! > > > Let me lead you to the right place to look for: > > > > The CAM interface (which is from the SCSI standards group) > > usually is implemeted in a way that applications open /dev/cam and > > later supply bus, target and lun in order to get connected > > to any device on the system that talks SCSI. > > > > Let me repeat: If you believe that this is a bad idea, give very good > > reasons. > > There is one: hotplug. The physical topology of buses where all the > SCSI-like devices (being it ATAPI devices, iSCSI, USB disks or other such > beasts) are connected is too complex, so every attempt to map them to the > (bus, target, lun) triplets in any sane way is destined to fail.
Just to add on this, how is someone supposed to distinguish between two identical USB recorders using the scanbus/X:Y:Z method? I suppose he'll have to try writting to both drives each time he replugs them instead of having /dev/cdr-red /dev/cdr-blue or something similar using hotplug/udev.
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