Re: Apple Xserve RAID and qlogic ISP2312 (qla2300)

[Patrick Mansfield <patmans@us.ibm.com>]

[ resending ... not sure if this went out at all ]

On Mon, Nov 01, 2004 at 12:56:11PM +0200, Catalin Muresan wrote:
> 
> 	I have the attached patch from Andrew which fixes the qla2300 part
> of the problem (attached) and a patch is still needed for the case where
> there are LUN0,3 to blacklist the device as BLIST_SPARSELUN.

No attachment ...

>  > 2) If LUN 0 gets a DID_NO_CONNECT (and we do return the
>  > SCSI_SCAN_NO_RESPONSE), we won't scan anything, via REPORT LUN or via
>  > a sequential scan.
> 
> 	we need to have something on LUN 0 to be able to send REPORT LUN, in
> this case we don't.

You don't need storage configured on LUN 0 to send it a REPORT LUN, if
there is a target there, you can (well should) be able to send it a REPORT
LUN.

You do need the driver to allow commands to be issued to LUN 0 (that is
what the patch should have fixed).

SCSI spec says:

	A SCSI device shall support a REPORT LUNS command that is
	addressed to logical unit zero. Support of the REPORT LUNS command
	by logical units other than logical unit zero is optional.

> 	Do you need me to test some other stuff or we can "close" this
> issue?	

In order of best to worst solutions:

If device supports REPORT LUNs:

1) configure the array to report as SCSI-3

2) black list as BLIST_REPORTLUN2

If no REPORT LUNs support:

3) black list as BLIST_SPARSELUN

-- Patrick Mansfield