From: Tejun Heo <htejun@gmail.com>
To: Petr Vandrovec <vandrove@vc.cvut.cz>
Cc: "Robin H. Johnson" <robbat2@gentoo.org>,
linux-ide@vger.kernel.org, Richard Scobie <richard@sauce.co.nz>
Subject: Re: Resets on sil3124 & sil3726 PMP
Date: Fri, 07 Sep 2007 03:02:45 +0900 [thread overview]
Message-ID: <46E040C5.1060509@gmail.com> (raw)
In-Reply-To: <46DFCDF0.6050107@vc.cvut.cz>
Petr Vandrovec wrote:
> Concurrent hdparm -t, like
>
> hdparm -t /dev/sdd & hdparm -t /dev/sde & hdparm -t /dev/sdf & hdparm -t
> /dev/sdg & sleep 20
>
> (and from hdparm output & visually confirmed that all activity LEDs go
> on & off simultaneously)
Not sure whether it matters but 'hdparm' tests are fairly short. You
can probably get more reliable result using dd with direct flag specified.
> So NCQ should not be able to show any (definitely not huge) benefits,
> but there should not be any reason to not get 4x 1 drive speed as long
> as neither PMP link nor PCI-X limits are hit.
As said before, 3124/32 hardware seems to have limitations in transfer
rate it can reach.
Thanks.
--
tejun
next prev parent reply other threads:[~2007-09-06 18:04 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-27 4:55 Resets on sil3124 & sil3726 PMP Richard Scobie
2007-08-27 7:11 ` Petr Vandrovec
2007-09-03 8:59 ` Tejun Heo
2007-09-03 9:57 ` Petr Vandrovec
2007-09-03 12:50 ` Tejun Heo
2007-09-04 1:38 ` Petr Vandrovec
2007-09-05 12:08 ` Petr Vandrovec
2007-09-05 21:30 ` Robin H. Johnson
2007-09-06 9:52 ` Petr Vandrovec
2007-09-06 18:02 ` Tejun Heo [this message]
2007-09-06 17:59 ` Tejun Heo
-- strict thread matches above, loose matches on Subject: below --
2007-09-03 19:39 Richard Scobie
2007-09-03 20:34 ` Robin H. Johnson
2007-09-03 21:21 ` Richard Scobie
2007-08-27 8:08 Richard Scobie
2007-08-27 22:49 ` Robin H. Johnson
2007-08-15 13:58 Rusty Conover
2007-08-17 18:06 ` Tejun Heo
2007-08-20 19:56 ` Rusty Conover
2007-08-21 2:42 ` Rusty Conover
2007-08-22 3:03 ` Tejun Heo
2007-08-22 5:00 ` Rusty Conover
2007-08-22 5:43 ` Tejun Heo
2007-08-22 6:11 ` Rusty Conover
2007-08-22 6:39 ` Tejun Heo
2007-08-22 6:56 ` Rusty Conover
2007-08-22 7:02 ` Tejun Heo
2007-08-22 7:49 ` Rusty Conover
2007-08-25 2:19 ` Tejun Heo
2007-08-26 16:37 ` Rusty Conover
2007-08-27 1:18 ` Tejun Heo
2007-08-14 23:39 Rusty Conover
2007-08-15 6:10 ` Tejun Heo
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