[mythtv-users] Re:LVM & Disk Performance

[Olivier]

That was it; dma was not enabled. thanks for all comments;


----- Original Message -----
From: "Ben Curtis" <fmstratk at coronium.com>
To: <mythtv-users at mythtv.org>
Sent: Monday, November 17, 2003 10:45 AM
Subject: [mythtv-users] Re:LVM & Disk Performance


> > Well actually back in the ata33/66 days this was true, but from what I
> > understand all modern ata100/133 controllers have resolved this problem.
> > In the case here you have to either have the two hard drives on the same
> > channel or a hard drive and cdrom on the same channel. I would say that
> > the layout you have suggested would be the best.
> >
>
> I thought the same thing.  Since the induction of 80 wire cables, there
> really shouldn't be any chain issues even with him using the slave drive
> on the same chain as the main drive unless he's taxing both to their full
> extent at the same time.
>
> It's more likely that the drive isn't defualting something correctly, like
> DMA mode for instance.  What do you get from the following commands on
> both drives:
>
> hdparm /dev/hda
> hdparm -Tt /dev/hda
>
> Replace hda with whichever two you use, hda and hdb probably. (or hdc if
> you've already moved the drive to the second chain).  The first command
> will tell you what modes are set, the second will do some read speed
> tests.
>
> Ben
>
>


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