Re: [LSF/MM TOPIC] Fixing large block devices on 32 bit

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On Fri, 2014-01-31 at 14:26 -0500, Dave Jones wrote:
> On Fri, Jan 31, 2014 at 11:02:58AM -0800, James Bottomley wrote:
>  
>  > it will only be a couple of years before 16TB devices are
>  > available.  By then, I bet that most arm (and other exotic CPU) Linux
>  > based personal file servers are still going to be 32 bit, so they're not
>  > going to be able to take this generation (or beyond) of drives. 
>  > 
>  >      1. Try to pretend that CONFIG_LBDAF is supposed to cap out at 16TB
>  >         and there's nothing we can do about it ... this won't be at all
>  >         popular with arm based file server manufacturers.
> 
> Some of the higher end home-NAS's have already moved from arm/ppc -> x86_64[1]
> Unless ARM64 starts appearing at a low enough price point, I wouldn't be 
> surprised to see the smaller vendors do a similar move just to stay competitive.
> (probably while keeping 'legacy' product lines for a while at a cheaper pricepoint
>  that won't take bigger disks).

So yould you bet on the problem solving itself *before* we get 16TB
disks?  Because if we ignore it, that's the bet we're making.

James


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