Johann-Christoph Jacob wrote: > my problem is not with the transfer mode but with the NCQ queue_depth. > My bootlog shows: > ata1.00: 234441648 sectors, multi 16: LBA48 NCQ (depth 1) > but i would like it to show: > ata1.00: 234441648 sectors, multi 16: LBA48 NCQ (depth 31/32) > or something similar. > I was not exact enough concerning the writeability of > /sys/block/sda/device/queue_depth > The file is not read only but writing to it fails: > echo 31 > /sys/block/sda/device/queue_depth > bash: echo: write error: Invalid argument Right. >>> ATA device, with non-removable media >>> Model Number: WDC WD1200BEVS-07LAT0 >>> Serial Number: WD-WXE906801963 >>> Firmware Revision: 01.06M01 >>> Standards: >>> Supported: 7 6 5 4 >>> Likely used: 7 >>> Configuration: >>> Logical max current >>> cylinders 16383 16383 >>> heads 16 16 >>> sectors/track 63 63 >>> -- >>> CHS current addressable sectors: 16514064 >>> LBA user addressable sectors: 234441648 >>> LBA48 user addressable sectors: 234441648 >>> device size with M = 1024*1024: 114473 MBytes >>> device size with M = 1000*1000: 120034 MBytes (120 GB) >>> Capabilities: >>> LBA, IORDY(can be disabled) >>> Queue depth: 1 Hmm... Here it is. Interesting. The drive is reporting queue depth of 1. Interesting. This is the first time I see this. The drive is telling libata that it supports NCQ and the max queue depth is 1 and libata configures it accordingly. I'll ask wd about it. Thanks. -- tejun - 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
