Hi Gnana, On 3 January 2018 at 17:47, Gnana Sekhar <kgsgnana2020@xxxxxxxxx> wrote: > > Basically I am looking to see if FIO has the below option > 1. Pass the LBA count as an argument. From your explanation my > understanding is currently FIO doesn't have that option Well I'm still unsure what LBA count means in this context. If my blocks are 512 bytes big and I want a single write to cover LBA 0 - 3 then isn't the blocksize of 4k controlling the LBA count? Sorry to keep asking I just don't understand the request. > 2. On the buffer pattern I wasn't able to specify the buffer pattern > to be all 0(zero) but --buffer_pattern=1 works fine. Do I have to use > zero_buffers to fill buffers with zero and not buffer_pattern Hmm! 0 is going to be interpreted as "this option is unset". Does 0x0 work? > For option1, if I cant pass LBA count, my plan is to > get LBA size of the drive, > multiply the LBA size with lba count which will give me the size in bytes > pass the size with --size=x b where x is the size obtained in above step Are you trying to do I/O "on the spot" (e.g. only do I/O to the exact same region for the whole job)? If so you can * Use offset (http://fio.readthedocs.io/en/latest/fio_doc.html#cmdoption-arg-offset ) and size (http://fio.readthedocs.io/en/latest/fio_doc.html#cmdoption-arg-size ) to limit the region you do I/O within * Have blocksize use a value of <x> and the rw=read:<-x> * Use rw_sequencer=identical and rw=read:<highnumberhere> (http://fio.readthedocs.io/en/latest/fio_doc.html#cmdoption-arg-rw-sequencer ) ? -- Sitsofe | http://sucs.org/~sits/ -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
