Does Fio know the MaxLBA for devices it runs to? If the size variable has a percentage value, for example 50%, then it must have to read the MaxLBA to know that on a 4TB drive the size of file we want is 2TB? Is this correct or does it use another method? If so would it be possible to have a reserved keyword for the MaxLBA, much as you do currently for pagesize, memory & cpu's so that the size & offset variable could make use of it, with the simple math supported? Not being a programmer and having very limited knowledge when it comes to reading code, I have no idea if this is even possible within Fio? If the above is not suitable, would it be possible for the offset variable to accept percentages much like the size variable? This comes from wanting to run Fio from dual hosts, I need to be able to control which parts of the disk each host can access, so that they do not interfere, on drives & ssds of many different sizes. Basic example: [Host 1] size=50% offset=0 [Host 2] size=50% offset 50% Thanks, Gavin -- ------------------------------ For additional information including the registered office and the treatment of Xyratex confidential information please visit www.xyratex.com ------------------------------ -- 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