Re: [git patch] libata resume fix

[Ric Wheeler]

Linus Torvalds wrote:

> On Tue, 30 May 2006, Mark Lord wrote:
>  
>
> > Not in a suspend/resume capable notebook, though.
> >
> > I don't know of *any* notebook drives that take longer
> > than perhaps five seconds to spin-up and accept commands.
> > Such a slow drive wouldn't really be tolerated by end-users,
> > which is why they don't exist.
> >    
>
> Indeed. In fact, I'd be surprised to see it in a desktop too.
>
> At least at one point, in order to get a M$ hw qualification (whatever 
> it's called - but every single hw manufacturer wants it, because some 
> vendors won't use your hardware if you don't have it), a laptop needed to 
> boot up in less than 30 seconds or something.
>
> And that wasn't the disk spin-up time. That was the time until the Windows 
> desktop was visible.
>
> Desktops could do a bit longer, and I think servers didn't have any time 
> limits, but the point is that selling a disk that takes a long time to 
> start working is actually not that easy. 
>
> The market that has accepted slow bootup times is historically the server 
> market (don't ask me why - you'd think that with five-nines uptime 
> guarantees you'd want fast bootup), and so you'll find large SCSI disks in 
> particular with long spin-up times. In the laptop and desktop space I'd be 
> very surprised to see anythign longer than a few seconds.
>
> 		Linus
>  
With many data centera applications, delayed spin up of SCSI (and 
increasingly S-ATA) drives is a feature meant to avoid blowing a circuit 
when you spin up too many drives at once ;-)

Ric

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