From: Samuel Flory <sflory@rackable.com>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: Andre Tomt <lkml@tomt.net>,
linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
linux-scsi@vger.kernel.org
Subject: Re: Serial ATA (SATA) for Linux status report
Date: Wed, 03 Dec 2003 16:59:25 -0800 [thread overview]
Message-ID: <3FCE86ED.8070601@rackable.com> (raw)
In-Reply-To: <3FCE737C.1080105@pobox.com>
Jeff Garzik wrote:
> Andre Tomt wrote:
>
>> On Wed, 2003-12-03 at 21:44, Jeff Garzik wrote:
>>
>>> Intel ICH5
>>> ----------
>>> Summary: No TCQ. Looks like a PATA controller, but with a few added,
>>> non-standard SATA port controls.
>
>
>> One question - with "including hotplug", does that mean some set hotplug
>> standard? Reason I'm asking is, we have a few servers from SuperMicro,
>> with a ICH5R S-ATA controller that claims it's supporting hotplug, but
>> hotplug is not in your ICH5-summary.
>
>
> Alas, there is no hotplug support in the ICH5 or ICH5-R SATA hardware.
>
> One could argue there is "coldplug" support in that hardware -- disable
> the entire interface, including any active devices, then re-enable and
> re-scan -- but it's a bit of a hack. If there's enough demand, I could
> write some code for that. It would involve something like
>
> # /sbin/sata off
> { plug in or remove a device }
> # /sbin/sata on
>
> You really, really, really don't want to actually unplug a SATA drive
> while it's active, on ICH5 hardware.
>
In theroy the scsi driver allows you kill a drive, and do rescan by
echoing to /proc/scsi.scsi. I know it worked under 2.4 with sca drive
on a hotswap backplane. This was over a year ago. So it may have been
broken.
scsi.c:
* Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi
* with "0 1 2 3" replaced by your "Host Channel Id Lun".
/*
* Usage: echo "scsi remove-single-device 0 1 2 3" >/proc/scsi/scsi
* with "0 1 2 3" replaced by your "Host Channel Id Lun".
*
PS- Yes I know says it isn't for hotswap, and that it's prebeta. This
comment dates back to at least 2.2. It's worked for least 4 years.
--
There is no such thing as obsolete hardware.
Merely hardware that other people don't want.
(The Second Rule of Hardware Acquisition)
Sam Flory <sflory@rackable.com>
next prev parent reply other threads:[~2003-12-04 0:59 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-03 20:44 Serial ATA (SATA) for Linux status report Jeff Garzik
2003-12-03 23:27 ` Andre Tomt
2003-12-03 23:36 ` Jeff Garzik
2003-12-04 0:21 ` Miquel van Smoorenburg
2003-12-04 0:59 ` Samuel Flory [this message]
2003-12-04 1:02 ` Andre Tomt
2003-12-04 13:38 ` Justin Cormack
2003-12-04 14:54 ` Jeff Garzik
2003-12-04 8:17 ` Arnaud Launay
2003-12-04 15:01 ` Jeff Garzik
2003-12-05 17:42 ` Mickael Marchand
2003-12-05 17:47 ` Jeff Garzik
2003-12-05 18:07 ` [PATCH] Silicon image 3114 SATA link (really basic support) Mickael Marchand
2003-12-09 18:22 ` Aron Rubin
2003-12-09 18:54 ` Mickael Marchand
2003-12-09 20:14 ` Bartlomiej Zolnierkiewicz
2003-12-12 0:07 ` Mickael Marchand
2003-12-05 18:16 ` Serial ATA (SATA) for Linux status report Kevin P. Fleming
2003-12-05 18:29 ` Jeff Garzik
2003-12-09 9:39 ` Petr Sebor
2003-12-09 19:59 ` J. Ryan Earl
2004-01-14 22:18 ` Greg Stark
2004-01-14 22:56 ` Erik Andersen
2004-01-14 23:31 ` James Courtier-Dutton
2004-01-15 0:41 ` Jeff Garzik
2004-01-15 2:38 ` Erik Andersen
2004-01-18 12:34 ` Martin Schlemmer
2004-01-14 23:32 ` Raphael Rigo
2004-01-15 0:08 ` Erik Steffl
2004-01-15 2:39 ` Matthias Hentges
2004-01-15 21:08 ` Greg Stark
2004-01-14 23:12 ` Erik Steffl
2004-01-18 13:32 ` Witold Krecicki
2004-01-18 18:00 ` Jeff Garzik
2004-01-18 20:33 ` Craig Bradney
2003-12-04 18:03 Jon Burgess
2004-08-24 19:49 Jeff Garzik
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