>>>>> "david" == david <david@xxxxxxx> writes: david> even if we can't get them to give us any info from the drive david> directly, we still want to allow the sysadmin to configure the david> use of the systems when they can find the info in other ways. You can specify RAID parameters on the mkfs.xfs command line today. mke[234]fs have similar knobs. david> if you have the smallest and largest I/O you can submit without a david> penalty and the alignment, isn't the optimal I/O size everything david> between these two? (or at least everything between these two may david> be close enough that defining an 'optimal' size may not be david> worthwhile) These parameters come straight out of SCSI. I described them wrong. maximum is the biggest I/O the device can handle, full stop. Optimal is the preferred I/O size for the array. -- Martin K. Petersen Oracle Linux Engineering -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
