Re: sata_sil24 not configuring drive right?

[Tejun Heo <htejun@gmail.com>]

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