cvs commit: src/sys/dev/ata ata-all.c ata-all.h ata-chipset.cata-dma.c ata-pci.c ata-pci.h

[Alexander Leidinger]

On Tue, 8 Apr 2003 15:27:09 +0200 (CEST)
Soeren Schmidt <sos at spider.deepcore.dk> wrote:

> It seems Alexander Leidinger wrote:
> > Dag-Erling Smorgrav <des at ofug.org> wrote:
> > > Alexander Leidinger <Alexander at Leidinger.net> writes:
> > > > For metadata intensive operations in a softupdates world they seem to
> > > > buy as much as a write-cache (without the drawbacks of a wc in the
> > > > softupdates world)... at least on a SCSI system.
> > > 
> > > ATA != SCSI
> > 
> > Yes... so what's the problem with ATA & TQ?
> 
> Its borked at the moment.

I know... let's assume it would work: what's the problem with ATA & TQ
which prevents it from being as effective as the SCSI TQ?

> > > Besides, enabling ATA tags automatically enables the write cache.
> > 
> > This can be changed...
> 
> No it cannot, requirement of the HW.

Does this mean we can't use ATA-TQ in situations where we would use TQ
without WC on a SCSI system (read: does it affect softupdates)?

Bye,
Alexander.

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http://www.Leidinger.net                       Alexander @ Leidinger.net
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