Bug 398651

Summary:	Can not set NCQ queue_depth with sata_mv
Product:	[Fedora] Fedora	Reporter:	Brian Rademacher <rad>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED UPSTREAM	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	low	Docs Contact:
Priority:	low
Version:	8
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-11-27 23:48:14 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Brian Rademacher 2007-11-25 19:57:59 UTC

Description of problem:

Setting queue_depth in /sys/block/sd(x)/device results in "queue_depth: 
Permission denied".  Changing permissions results in "write error: Input/output 
error".

Controller is: Marvell Technology Group Ltd. MV88SX6081 8-port SATA II PCI-X 
Controller (rev 09)

Drives are all Seagate ST3320620AS, firmware 3.AAK.  HDPARM reports NCQ 
capability, queue depth of 32.  DMESG shows disabled on boot:
ata1.00: 625142448 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata2.00: 625142448 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata3.00: 625142448 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata4.00: 625142448 sectors, multi 0: LBA48 NCQ (depth 0/32)


Version-Release number of selected component (if applicable):

2.6.23.8-62.fc8 #1 SMP Tue Nov 20 15:25:44 EST 2007 x86_64 x86_64 x86_64 
GNU/Linux

Additional info:

I've searched and can't find that my controller and/or drives are blacklisted 
for NCQ, but this is one possibility.  sata_mv may also be missing the 
functionality to change this parameter.

Comment 1 Chuck Ebbert 2007-11-27 23:48:14 UTC

sata_mv does not support NCQ. Future support is planned, though.