From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yathindra <ydev@cs.utah.edu>
Subject: Re: Simulating faulty disk
Date: Thu, 20 Oct 2011 09:45:05 -0600
Message-ID: <4EA04201.1050702@cs.utah.edu>
References: <4E9F9321.8090704@cs.utah.edu> <4E9FE97E.4030209@redhat.com>
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To: "Bryn M. Reeves" <bmr@redhat.com>
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Hi Bryn,

Thanks for that info. Could you please tell me where I can find more 
details about using it.

Thanks again,
Yathi

On 10/20/2011 3:27 AM, Bryn M. Reeves wrote:
> On 10/20/2011 04:18 AM, Yathindra wrote:
>> I'm trying to simulate a faulty disk behavior on linux. Basically, I
>> want to inject various disk failure patterns
>> such as medium errors, unresponsive disk etc.
>
> If using a device-mapper device is acceptable for your purpose there 
> are the dm-flakey and dm-delay targets that can add delays, drop and 
> corrupt writes and introduce intermittent I/O errors.
>
> The targets can be stacked to give devices having any combination of 
> these behaviours.
>
> Regards,
> Bryn.