Re: Mapping sectors to have errors

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

Hi Joe,

I tried it the other way but when I specify error it doesn't seem to take
the start sector > 0.

# echo "0 `blockdev --getsz /dev/sdb` linear /dev/sdb 0" | dmsetup 
create bad_disk

# dmsetup table
bad_disk: 0 488281250 linear 8:16 0

# echo "100000 488181250 error" | dmsetup load bad_disk << This failed
device-mapper: reload ioctl failed: Invalid argument
Command failed

# echo "0 100000 error" |  dmsetup load bad_disk << This worked

Any ideas?

Thanks,
Yathi


On 10/28/2011 3:11 AM, Joe Thornber wrote:
> On Thu, Oct 27, 2011 at 08:31:00PM -0600, Yathindra wrote:
>> Hi,
>>
>> 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
>>
>> I have put in the right arguments but not sure why it fails.
> You have 2 target lines concatenated onto the same line there.