Hi,
Can anybody with experience in using scsi_debug driver tell me if it can
be used to inject medium errors on various file/disk blocks.
And also, can it delay commands so we can simulate an unresponsive disk.
Thanks,
Yathi
On 10/20/2011 1:30 AM, Yathindra wrote:
Hi Bryan,
I saw this too but it does not have features to delay the commands.
And it works only at the file level.
I thought about scsi_debug driver but it seems to able to inject
medium errors on sector 0x1234 only.
I'm not sure why that limitation exists though.
Thanks,
Yathi
On 10/19/2011 10:47 PM, Bryan Mesich wrote:
On Wed, Oct 19, 2011 at 09:18:57PM -0600, Yathindra wrote:
Hi,
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.
What is the best way to go about it. I heard about scsi_debug driver
but
it can only simulate medium
errors on fixed sector 0x1234. Also, scsi fault injection using
Systemtap seems to be a user space tool
limited to files.
Any suggestions is greatly appreciated.
I saw this go by the linux-scsi list a while back thinking it
might be useful sometime down the road:
http://lwn.net/Articles/265187/
I think the project is hosted on sourceforge.net at the following
URL:
http://scsifaultinjtst.sourceforge.net/
I had also read through part of a paper that was co-authored by
the same person (from linux symposium 2008):
http://www.linuxsymposium.org/archives/OLS/Reprints-2008/tanaka-reprint.pdf
Doesn't look like there has been much activity since 2009, but it
looks like it has the functionality you need.
Bryan
Thanks,
Yathi
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