Re: Mapping sectors to have errors

[Yathindra <ydev@cs.utah.edu>]

Hi Milan,

I'm trying to inject random sector errors using device mapper.

Suppose I want to inject some 50 errors on random sectors, is their a 
way to do
this without having to reload the table every time.

Thanks,
Yathi

On 10/28/2011 1:46 PM, Yathindra wrote:
> Hi Milan,
>
> It worked! Thanks so much ! :)
>
> Have a great weekend.
>
> On 10/28/2011 1:42 PM, Milan Broz wrote:
>> On 10/28/2011 04:31 AM, Yathindra wrote:
>>> I'm trying to create a disk and map some sectors to have errors on 
>>> them.
>>>
>>> I tried this,
>>> echo "0 100000 linear /dev/sdb 0 100000 480081250 error"| dmsetup 
>>> create bad_disk
>>> device-mapper: reload ioctl failed: Invalid argument
>>> Command failed
>> Try
>> echo -e "0 100000 linear /dev/sdb 0\n100000 480081250 error"| dmsetup 
>> create bad_disk
>>
>> Milan
>