Re: [RFT] Support for ~2144 SCSI discs

[Karcaw]

I am pleased to see this, I recently expanded the majors number range
on my system from 8 majors to 32 by just pushing the secondary range
from 65-71 to 65-95, This solution Stomped on other majors, COMPAQ
SMART array and IDE6-9, etc. I did not think this was a viable solution
to the mainstream kernel so I have only been using it here.  I am glad
someone with more experience is fixing this one.  I am currently
working with linux on a the HP VA7100 that can support up to 1024 LUNS
(limited by fibre Channel HBAs to 256 or 128) on a single device, so I
am using up disks very quickly with only 128 availible. 

One questions I have on the patch:
-in drivers/char/sysrq.c:is_local_disk(...) references the SCSI major
numbers, should it change for this patch?

I wrote a patch for the Scsi Generic Driver that uses devfs to extend
the numbers of genric devices beyond the 256 minor limit.  It will use
as many major/minor numbers that it can get from devfs for generic scsi
drivers.  it can be found on the official sg web site at:
http://gear.torque.net/sg/ as an experimental driver(sg3120df).

Evan Felix

--- Richard Gooch <[e-mail]> wrote:
>   Hi, all. Below is a patch that adds support for large numbers of
> SCSI discs (approximately 2144). I'd like people to try this out. I'm
> not doing my normal devfs-patch-v??? thing because this is completely
> untested (I'm away from my SCSI boxes), and I don't want to put a
> possibly FS-corrupting patch on my ftp archive. The code does compile
> and link, though.
> 
> There are 3 cases I'd like to have tested:
> - people with 1 to 16 SCSI discs
> - people with 17 to 128 SCSI discs
> - people with >128 SCSI discs
> 
> because each of these exercises a slightly different setup path.
> Please send success or failure reports to me.
> 
> REMINDER: be careful with this patch. It could corrupt your FS.
> 
> 				Regards,
> 
> 					Richard....
> Permanent: [e-mail]
> Current:   [e-mail]

=====
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Evan Felix
[e-mail]
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