* Re: Again... DMA speed too slow
[not found] <20080330235357.20a54963@werewolf>
@ 2008-04-02 7:16 ` Andrew Morton
2008-04-13 2:23 ` Tejun Heo
0 siblings, 1 reply; 2+ messages in thread
From: Andrew Morton @ 2008-04-02 7:16 UTC (permalink / raw)
To: J.A. Magallón ; +Cc: Linux-Kernel, , linux-ide
On Sun, 30 Mar 2008 23:53:57 +0200 "J.A. Magallón" <jamagallon@ono.com> wrote:
> Hi all...
>
> I have tried to burn some data from the commandline with wodim (since time
> ago I just used beasero...), and I have noticed this (media is CD, not DVD):
>
> Vendor_info : 'HL-DT-ST'
> Identification : 'DVDRAM GSA-H10N '
> Revision : 'JL12'
> Device seems to be: Generic mmc2 DVD-R/DVD-RW.
> Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr).
> Driver flags : MMC-3 SWABAUDIO BURNFREE
> Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
> Speed set to 8467 KB/s
> wodim: DMA speed too slow (OK for 5x). Cannot write at speed 48x.
> Starting to write CD/DVD at speed 48.0 in real TAO mode for single session.
>
> I just can burn CDs at 5x ??
> But then the program tries to write at 48x.
> It the DMA message really true ?
>
> Accodring to wodim -prcap:
>
> Maximum read speed: 22161 kB/s (CD 125x, DVD 16x)
> Current read speed: 22161 kB/s (CD 125x, DVD 16x)
> Maximum write speed: 11080 kB/s (CD 62x, DVD 8x)
> Current write speed: 11080 kB/s (CD 62x, DVD 8x)
> Rotational control selected: CLV/PCAV
> Buffer size in KB: 2048
> Copy management revision supported: 1
> Number of supported write speeds: 3
> Write speed # 0: 11080 kB/s CLV/PCAV (CD 62x, DVD 8x)
> Write speed # 1: 5540 kB/s CLV/PCAV (CD 31x, DVD 4x)
> Write speed # 2: 3324 kB/s CLV/PCAV (CD 18x, DVD 2x)
>
> Why the tests in wodim say that DMA to the drive is slow ?
>
> Kernel is 2.6.24.4.
> The drive is controlled by libata+sata_promise:
>
> sata_promise 0000:03:04.0: version 2.11
> ACPI: PCI Interrupt 0000:03:04.0[A] -> GSI 23 (level, low) -> IRQ 17
> scsi6 : sata_promise
> scsi7 : sata_promise
> scsi8 : sata_promise
> ata5: SATA max UDMA/133 mmio m4096@0xf6029000 port 0xf6029200 irq 17
> ata6: SATA max UDMA/133 mmio m4096@0xf6029000 port 0xf6029280 irq 17
> ata7: PATA max UDMA/133 mmio m4096@0xf6029000 port 0xf6029300 irq 17
> ata5: SATA link down (SStatus 0 SControl 300)
> ata6: SATA link down (SStatus 0 SControl 0)
> ata7.00: ATA-6: ST3120022A, 3.06, max UDMA/100
> ata7.00: 234441648 sectors, multi 0: LBA48
> ata7.01: ATAPI: HL-DT-ST DVDRAM GSA-H10N, JL12, max UDMA/33
> ata7.00: configured for UDMA/100
> ata7.01: configured for UDMA/33
> scsi 8:0:0:0: Direct-Access ATA ST3120022A 3.06 PQ: 0 ANSI: 5
> sd 8:0:0:0: [sdd] 234441648 512-byte hardware sectors (120034 MB)
> sd 8:0:0:0: [sdd] Write Protect is off
> sd 8:0:0:0: [sdd] Mode Sense: 00 3a 00 00
> sd 8:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
> sd 8:0:0:0: [sdd] 234441648 512-byte hardware sectors (120034 MB)
> sd 8:0:0:0: [sdd] Write Protect is off
> sd 8:0:0:0: [sdd] Mode Sense: 00 3a 00 00
> sd 8:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
> sdd: sdd1
> sd 8:0:0:0: [sdd] Attached SCSI disk
> sd 8:0:0:0: Attached scsi generic sg3 type 0
> scsi 8:0:1:0: CD-ROM HL-DT-ST DVDRAM GSA-H10N JL12 PQ: 0 ANSI: 5
> sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
>
> UDMA/33 on the burner should be ok for 48x (150x48 = 7.2 MB/s) ?
> Or just 16x, as I read elsewhere ?
>
Please always cc linux-ide on ata-related bug reports.
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