linux-kernel - Re: [PATCH] Re: pata_it821x in 2.6.27 - works but no LBA48 and "hdparm -t" is slower

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Message-ID: <20081018184621.16ed1d0b@the-village.bc.nu>
Date:	Sat, 18 Oct 2008 18:46:21 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Ondrej Zary <linux@...nbow-software.org>
Cc:	linux-kernel@...r.kernel.org, jeff@...zik.org
Subject: Re: [PATCH] Re: pata_it821x in 2.6.27 - works but no LBA48 and
 "hdparm -t" is slower

On Sat, 18 Oct 2008 18:30:37 +0200
Ondrej Zary <linux@...nbow-software.org> wrote:


> This patch fixes LBA48 on pata_it821x RAID volumes - and to my surprise, also
> increases the "hdparm -t" speed back. Haven't tested access to >128GB area.
> 
> ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
> pata_it821x 0000:00:12.0: PCI INT A -> Link[LNKC] -> GSI 11 (level, low) -> IRQ 11
> pata_it821x: controller in smart mode.
> pata_it821x 0000:00:12.0: setting latency timer to 64
> pata_it821x: Firmware 02/09/3030
> 0: MWDMA2 RAID1RAID 0+1 Volume: 0 SAMSUNG HD400LD
> 1: MWDMA2 RAID1RAID 0+1 Volume: 0 SAMSUNG HD400LD
> scsi2 : pata_it821x
> scsi3 : pata_it821x
> ata3: PATA max UDMA/133 cmd 0x6800 ctl 0x6c00 bmdma 0x7800 irq 11
> ata4: PATA max UDMA/133 cmd 0x7000 ctl 0x7400 bmdma 0x7808 irq 11
> ata3.00: ATA-4: Integrated Technology Express Inc, , max MWDMA2
> ata3.00: 781422766 sectors, multi 0: LBA48
> ata3.00: RAID1 volume.
> ata3.00: configured for DMA
> scsi 2:0:0:0: Direct-Access     ATA      Integrated Techn n/a  PQ: 0 ANSI: 5
> sd 2:0:0:0: [sdb] 781422766 512-byte hardware sectors (400088 MB)
> sd 2:0:0:0: [sdb] Write Protect is off
> sd 2:0:0:0: [sdb] Mode Sense: 00 3a 00 00
> sd 2:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
> sd 2:0:0:0: [sdb] 781422766 512-byte hardware sectors (400088 MB)
> sd 2:0:0:0: [sdb] Write Protect is off
> sd 2:0:0:0: [sdb] Mode Sense: 00 3a 00 00
> sd 2:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
>  sdb: sdb1 sdb2 sdb3 sdb4
> sd 2:0:0:0: [sdb] Attached SCSI disk
> sd 2:0:0:0: Attached scsi generic sg2 type 0
> 
> 
> /dev/sdb:
>  Timing buffered disk reads:   60 MB in  3.01 seconds =  19.91 MB/sec
> 
> 
> 
> Fix LBA48 on pata_it821x RAID volumes.
> 
> Signed-off-by: Ondrej Zary <linux@...nbow-software.org>

Acked-by: Alan Cox <alan@...hat.com>
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