Steve, It's capped at 128k per request because that is the max size the firmware was tested with. If you increase that number, it is at your own risk, and you may have problems. -Adam On 8/17/06, Steve Lord <lord@xxxxxxx> wrote:
Does anyone know why the 3ware driver caps I/O at 128K bytes per scsi request? The driver defines a scatter gather array which will always cope with at least twice this. I am running with the TW_MAX_SECTORS constant at 512 and getting 256K I/Os to a 6+1 raid5 lun on a 9550SX. By my calculations this does not exceed the defined sizes of the scatter gather arrays for this type of device (but would I guess for the escalade variant in the code). I know nothing about the hardware itself, but if this works it seems like a worthwhile change for the newer devices. Thanks Steve Lord
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