Re: lun blacklist (Re: linux-kernel-digest V1 #236)

[Matti Aarnio]

On Fri, Feb 18, 2000 at 04:30:02PM +0000, SammyTheSnake wrote:
> > 2.2.15pre8
> > o	Add Yamaha CRW6416S to the lun blacklist	(Tim Waugh)
> 
> apolgies if this is a newbie question, but what exactly is the lun
> blacklist? I have a CRW8424S, is there anything I can do to confirm if this
> should also be on the blacklist?

	SCSI devices are addressed on a bus with ID + LUN, where ID
	is numeric prioritized thing, and LUN is "Logical UNit" inside
	the device.

	Some devices don't check what LUN value is used when probing
	existence of said device / its features and appear at all LUNs.
	Some other devices *must* have it working, like when LUN
	addresses individual disks at a multi-CD-changer/player, for
	example.

	It may also be that if LUN is non-zero, some devices simply
	hang the SCSI bus.

	Blacklists are something which are used to avoid known bad
	hardware from causing problems for otherwise nice working
	autoprobing of (SCSI) busses.

> HTH/TIA
> Cheers & God bless
> SammyTheSnake
> -- 
> email: SammyTheSnake(at)Hotmail.com (E)TLA page: www.warwick.ac.uk/~phuae/

/Matti Aarnio <[e-mail]>