From: Tejun Heo <htejun@gmail.com>
To: Fajun Chen <fajunchen@gmail.com>
Cc: linux-ide@vger.kernel.org, jgarzik@pobox.com
Subject: Re: Some questions about new EH in libata
Date: Tue, 22 Aug 2006 14:10:00 +0900 [thread overview]
Message-ID: <44EA91A8.5090309@gmail.com> (raw)
In-Reply-To: <8202f4270608212154k787f63a1k15ed3dcfff0624c2@mail.gmail.com>
Fajun Chen wrote:
> Hi Folks,
>
> I just upgraded to the libata with new EH and I have some questions
> about the new error handler:
> 1. In several occasions, I saw a port being disable, under what kind
> of conditions will new EH disable a port?
After EH fails to recover a device. It usually takes three recovery
trial failures.
> 2. For user space program, is there any way to checked the state of a
> port/drive? I noticed that dmesg has some printout but that could be
> wiped out by other traces or errors.
Hmmm... Not yet.
> 3. Does libata allow user space code to reset host/bus/drive or only
> libata itself has the privilege? I tried sg reset IOCTL interface on
> SATA Sil3124, it seems not working.
No, that doesn't work but issuing userscan forces libata to reset the
channel.
> 4. How to reenable a port/drive after it's disabled without rebooting?
> Any API or command from user space?
You can use SCSI userscan interface.
Regards.
--
tejun
next prev parent reply other threads:[~2006-08-22 5:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-22 4:54 Some questions about new EH in libata Fajun Chen
2006-08-22 5:10 ` Tejun Heo [this message]
2006-08-22 15:40 ` Fajun Chen
2006-08-22 15:51 ` Tejun Heo
2006-08-29 0:51 ` Fajun Chen
2006-08-29 2:16 ` Tejun Heo
2006-08-29 15:51 ` Fajun Chen
2006-08-29 16:00 ` Tejun Heo
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