[Bug 422994] Re: sata_via hard resetting link / freeze: exception Emask 0x12 SAct 0x0 SErr 0x1000500 action 0x6

[Antoine]

Ok, I've done it (on a productivity server, don't blamed me ;-) )

I've this chipset :

01:07.0 RAID bus controller: VIA Technologies, Inc. VT6421 IDE RAID Controller (rev 50)
	Subsystem: VIA Technologies, Inc. VT6421 IDE RAID Controller
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 32
	Interrupt: pin A routed to IRQ 19
	Region 0: I/O ports at a400 [size=16]
	Region 1: I/O ports at a800 [size=16]
	Region 2: I/O ports at ac00 [size=16]
	Region 3: I/O ports at b000 [size=16]
	Region 4: I/O ports at b400 [size=32]
	Region 5: I/O ports at b800 [size=256]
	[virtual] Expansion ROM at 300a0000 [disabled] [size=64K]
	Capabilities: <access denied>
	Kernel driver in use: sata_via
	Kernel modules: sata_via

This hardrive on the SATA connector :

        Model Family:     Western Digital Caviar Second Generation Serial ATA family
        Device Model:     WDC WD5000AAKS-00V1A0
        Serial Number:    WD-WCAWF2903335
        Firmware Version: 05.01D05
        User Capacity:    500 107 862 016 bytes
        Device is:        In smartctl database [for details use: -P show]
        ATA Version is:   8
        ATA Standard is:  Exact ATA specification draft version not indicated
        Local Time is:    Tue Sep 14 12:39:19 2010 CEST
        SMART support is: Available - device has SMART capability.
        SMART support is: Enabled

Now this kernel : 2.6.32-25-generic #43-Ubuntu SMP Wed Sep 1 09:46:39
UTC 2010 i686 GNU/Linux

And it *seems* to not have the usually annoying messages like « ata3.00:
cmd 25/00:60:bd:ad:41/00:00:1a:00:00/e0 tag 0 dma 49152 i ... blablabla
»

It seems also ti have improve the drive speed :
BEFORE :
/dev/sdc:
 Timing cached reads:   718 MB in  2.00 seconds = 359.02 MB/sec
 Timing buffered disk reads:   20 MB in  3.61 seconds =   5.55 MB/sec
AFTER :
/dev/sdc:
 Timing cached reads:   754 MB in  2.00 seconds = 376.38 MB/sec
 Timing buffered disk reads:  168 MB in  3.01 seconds =  55.81 MB/sec

Wow ! 10x faster !

Thank a lot for the fix guys !

-- 
sata_via hard resetting link / freeze: exception Emask 0x12 SAct 0x0 SErr 0x1000500 action 0x6
https://bugs.launchpad.net/bugs/422994
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