Re: WWN on FC LUN targets

[Rock Gordon <rockgordon@yahoo.com>]

Hi everyone, thanks once again for your replies!

The sg3_utils is very good - I will probably rely on
them.

On a related note - the /proc/partitions file can
handle only one page worth of entries for 2.4.18,
right? There might be a strong possibility of "losing"
entries due to this restriction. Is there any patch
out there to get around this problem?

Thanks,

> 
> The scsi_id program by Patrick Mansfield queries a
> SCSI device's
> identification and serial number vital product data
> (VPD) pages
> and produces a unique number. It is meant to be used
> in conjunction
> with udev (a dynamic device node creation, naming
> and removal facility
> based on the hotplug subsystem in the lk 2.6 series)
> to create device
> (and partition) node names according to user
> specified rules.
> Several versions can be found at this url:
>     http://www-124.ibm.com/storageio/scsi_id/
> 
> The sg_inq utility in the sg3_utils package (version
> 1.07) has
> a '-i' option that will decode all the
> "identification descriptors"
> in the device identification VPD page (0x83) for the
> nominated device.
> That information in conjunction with some of the
> explanations in
> this thread may show you what identifiers, if any,
> are available.
> The unit serial number page can be queried with
> 'sg_inq -o=80 /dev/sda'.
> sg3_utils can be found at: http://www.torque.net/sg
> 
> SPC-3 (SCSI Primary Commands) can be found
> http://www.t10.org
> The most recent draft is version 19 and section
> 7.6.4 and 7.6.11
> are relevant.
> 
> Doug Gilbert
> 


		
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