Messages in this thread | | | Date | Tue, 8 Jun 1999 18:43:57 -0400 | From | Wakko Warner <> | Subject | Re: Devfs, was Re: Migrating to larger numbers |
| |
> A device file system would certainly help with issues like hot swapping on USB. > And it allows you to run with a remote read only root, with local USB devices > that don't require real entries in /dev.
<I feel like this has been said enough, but =) > That's the way I feel about drives, scsi/ide, etc. I've been wondering with the way the sd/st/sr drivers are. Take this senerio (and assume hot plugging of scsi devices is ok.)
You boot a machine and have 2 seperate scsi controllers (booting from ide is assumed here). You load drivers for the first card with 1 scsi disk (sda), then you load drivers for the 2nd card with 1 scsi disk (sdb). What happens when you unload the drivers for scsi card #1, add a few more disks to the chain and add the driver back in. is it dynamic allocation where the first disk on the chain is sda and the 2nd -> 4th are sdc -> sde?
This is where I see devfs coming in handy. granted this isn't real world, but seriously, it's not something I wouldn't consider doing on test machines with random scsi cards. Devfs would really help in hot plugging/rescanning of the scsibus. I've always wondered, why /dev/hdd is always secondary ide, slave, and sdd is not id3 on scsi0
As I said above, I think this has been drilled into the ground.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |