Raz Ben-Jehuda(caro) wrote:
Is NCQ supported when setting the controller to JBOD instead of using HW raid?
1) The two have nothing to do with each other
2) It sounds like you haven't yet read
http://linux-ata.org/faq-sata-raid.html
Jeff
-
To unsubscribe from this list: send the line
Is NCQ supported when setting the controller to JBOD instead of using HW raid?
On 3/5/06, Eric D. Mudama <[EMAIL PROTECTED]> wrote:
> On 3/4/06, Steve Byan <[EMAIL PROTECTED]> wrote:
> > On Mar 4, 2006, at 2:10 PM, Jeff Garzik wrote:
> > > Measurements on NCQ in the field show a distinct performan
Hi,
I'm interested to implement a software RAID system
with a few SATA drives. I'm currently looking at
mdadm on Linux and RAIDframe on NetBSD.
Does anyone have experiences in both of these
implementations? Which one is more robust?
Thanks,
Sean Lee
___
On 3/4/06, Steve Byan <[EMAIL PROTECTED]> wrote:
> On Mar 4, 2006, at 2:10 PM, Jeff Garzik wrote:
> > Measurements on NCQ in the field show a distinct performance
> > improvement... 30% has been measured on Linux. Nothing to sneeze at.
>
> Wow! 30% is amazing. I'd be interested in knowing how the
On Mar 4, 2006, at 2:10 PM, Jeff Garzik wrote:
Steve Byan wrote:
Data integrity -and- performance. Performance increases for all
the standard reasons that an asynchronous pipeline increases
performance over a synchronous one.
The write cache means that requests on the device can be
> However, since "inconsistent parity information in raid[456] is equal
> to "different mirrors" in raid1, there is no real difference.
There is a major difference. Inconsistent parity information can
eventually lead to corruption in another sector in the stripe.
Assume there are two data disks an
Steve Byan wrote:
On Mar 3, 2006, at 5:19 PM, Jeff Garzik wrote:
Steve Byan wrote:
it. It works OK for reads. TCQ was really invented as a way to
allow CD-ROM drives to play nice on the same ATA bus as disks.
Disagree, you are probably thinking about bus disconnect associated
with the
On Mar 3, 2006, at 5:19 PM, Jeff Garzik wrote:
Steve Byan wrote:
it. It works OK for reads. TCQ was really invented as a way to
allow CD-ROM drives to play nice on the same ATA bus as disks.
Disagree, you are probably thinking about bus disconnect associated
with the overlapped command s
> If it relies on static page content during updates of its mirrors, it
> need to take a private copy of the page(s).
And by that you mean that raid5 and raid6 must copy the page
contents before writing it to disk?
--
Kasper Dupont -- Rigtige mænd skriver deres egne backupprogrammer
#define _(_)
On Sat, Mar 04, 2006 at 12:01:50AM +0100, Mario 'BitKoenig' Holbe wrote:
> Heinz Mauelshagen <[EMAIL PROTECTED]> wrote:
> > On Fri, Mar 03, 2006 at 03:30:29PM +0100, Mario 'BitKoenig' Holbe wrote:
> >> But when a dirty page is modified while it's being accessed, it stays
> >> dirty and gets cleaned
10 matches
Mail list logo