From: Martin Dalecki <dalecki@evision-ventures.com>
To: Pavel Machek <pavel@suse.cz>
Cc: Roy Sigurd Karlsbakk <roy@karlsbakk.net>, linux-kernel@vger.kernel.org
Subject: Re: IDE hotplug support?
Date: Thu, 02 May 2002 20:19:04 +0200 [thread overview]
Message-ID: <3CD18318.7060407@evision-ventures.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0204301746020.2301-100000@mustard.heime.net> <20020426152943.A413@toy.ucw.cz>
Uz.ytkownik Pavel Machek napisa?:
> Hi!
>
>
>>I came across a nice case from procase, supporting 16 IDE drives in
>>(so-called?) hotplug frames. Problem is... How will linux trat this?
>
>
> Should be okay. Hdparm can force spindown and bus rescan, and that's
> basically what you need.
>
>
>>I plan to use 15 drives in a RAID-5, assigning the last 16th drive as a
>>spare.
>
>
> 8 controllers? hmmm...
15 drives == 16 interfaces == 8 channels == 4 controllers
with primary and secondary channel.
He will have groups of about 4 drives on each channel wich
serialize each other due to excessive IRQ line sharing and
master slave issues.
8 x 130MBy/s >>>> PCI bus throughput... I would rather recommend
a classical RAID controller card for this kind of
setup.
The request aliasing effects will be almost for sure disasterous
to overall system performance.
next prev parent reply other threads:[~2002-05-02 19:21 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-30 15:48 IDE hotplug support? Roy Sigurd Karlsbakk
2002-04-26 15:29 ` Pavel Machek
2002-05-02 18:19 ` Martin Dalecki [this message]
2002-05-02 19:58 ` Jakob Østergaard
2002-05-02 20:09 ` Samuel Flory
2002-05-03 0:31 ` Roy Sigurd Karlsbakk
2002-05-03 3:14 ` jw schultz
2002-05-02 20:26 ` Alan Cox
2002-05-02 21:13 ` Jakob Østergaard
2002-05-02 20:18 ` Martin Dalecki
2002-05-02 22:22 ` Jeff Nguyen
2002-05-02 23:09 ` Jakob Østergaard
2002-05-03 0:16 ` Alan Cox
2002-05-03 0:35 ` Roy Sigurd Karlsbakk
2002-05-03 17:10 ` Roy Sigurd Karlsbakk
2002-05-03 0:25 ` Roy Sigurd Karlsbakk
2002-05-03 0:51 ` Alan Cox
2002-05-03 0:37 ` Roy Sigurd Karlsbakk
2002-04-30 16:22 ` Zwane Mwaikambo
2002-04-30 18:46 ` Ragnar Hojland Espinosa
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