On Fri, 13 Apr 2007 23:43:03 +0300, "Raz Ben-Jehuda(caro)" <[EMAIL PROTECTED]> wrote: > Jeff hello > I have a promise cotroller that exports its disks as logical volumes > to the OS, and the OS sees them as physical drives . kernel is 2.6.17. > I have set a disk manualy to support ncq using a command line tool > provided by promise. > I have "echo 1 > /sys/block/..../dev/rescan" and the ncq bit did not > show in dmesg. > queue_depth is set to 32 no matter if ncq is enabled or not. I cannot echo > to queue_depth , I get "permision denied" error ( libata faq says i > can do that ).
Assuming you're using libata's sata_promise driver and not Promise's driver, then the answer is that sata_promise doesn't yet support NCQ. It will display the disk's NCQ capability, but NCQ won't be activated. Implementing NCQ is on the TODO list, but I'm ignoring it as long as the problems with SATAII/3Gbps disks remain unresolved. /Mikael - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
