[dm-devel] Query: Significance of libmultipath/hwtable.c

[Christophe Varoqui]

On mer., 2013-06-12 at 11:45 +0530, amit mehta wrote:
> What is the significance of libmultipath/hwtable.c file. I see there
> is a list of vendors mentioned over here.
> 
> <snip>
> 
It's a database of defaults settings for known devices.
Those settings apply when not overriden by explicit settings in
multipath.conf.
  

> grep -i vendor libmultipath/hwtable.c|uniq
>         .vendor        = "COMPELNT",
>         .vendor        = "APPLE*",
>         .vendor        = "3PARdata",
>         .vendor        = "DEC",
>         .vendor        = "HP",
>         .vendor        = "(COMPAQ|HP)",
>         .vendor        = "HP",
>         .vendor        = "DDN",
>         .vendor        = "EMC",
>         .vendor        = "DGC",
>         .vendor        = "EMC",
>         .vendor        = "FSC",
>         .vendor        = "FUJITSU",
>         .vendor        = "HITACHI",
>         .vendor        = "IBM",
>         .vendor        = "IBM",
>         .vendor        = "AIX",
>         .vendor        = "IBM",
>         .vendor        = "AIX",
>         .vendor        = "IBM",
>         .vendor        = "AIX",
>         .vendor        = "DELL",
>         .vendor        = "NETAPP",
>         .vendor        = "IBM",
>         .vendor        = "Pillar",
>         .vendor        = "SGI",
>         .vendor        = "STK",
>         .vendor        = "SUN",
>         .vendor        = "PIVOT3",
>         .vendor        = "SUN",
>         .vendor        = "(LSI|ENGENIO)",
>         .vendor        = "STK",
>         .vendor        = "EUROLOGC",
>         .vendor        = "NEC",
>         .vendor        = NULL,
> 
> <snip>
> 
> 
> Under each of these vendors, there is a list of products from the same
> vendor as well. So does that mean, if the vendor and or product is
> not 
> mentioned in this file, that particular storage hardware may not be 
> supported by dm-multipath?
> 
It only means that the top-level defaults settings will be applied to
those multipaths.

Best regards,
Christophe Varoqui
www.opensvc.com