Hi, I recently bough a Promise SATA300 TX4 controller, which I am using in combination with an NCQ-capable harddrive. As the controller supports NCQ [1], and the libata webpages seems to indicate [2] that the sata_promise driver does as well, I am currently trying to enable NCQ (kernel 2.6.27). Without any luck however, my dmesg log indicates the following: [ 4.244047] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 4.253636] ata1.00: ATA-7: ST3500320AS, SD04, max UDMA/133 [ 4.253639] ata1.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32) [ 4.268850] ata1.00: configured for UDMA/133 And the NCQ queue depth flag seems read-only: tim@tim-desktop:~$ sudo echo 31 > /sys/block/sdb/device/queue_depth bash: /sys/block/sdb/device/queue_depth: Permission denied The read-only nature of the queue_depth field seems to indicate that the SATA module doesn't have NCQ support, but this contradicts with what I read on the libata page. Could you shed some light on this issue? And if the driver doesn't support NCQ for this card, is there another way to accomplish this (without having to buy a new controller)? References: 1: http://www.promise.com/product/product_detail_eng.asp?segment=Non-RAID% 20HBAs&product_id=139 2: http://linux-ata.org/driver-status.html#tx2 Thanks in advance, Tim -- 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
