cat /proc/ide/hd{a,c}/settings
You should see unmask listed.
echo unmask:1 > /proc/ide/hd{a,c}/settings
Cheers,
Andre Hedrick
LAD Storage Consulting Group
On Fri, 4 Jul 2003, Ryan Mack wrote:
> I've real the other threads but nothing touches on my specific issue. I
> have a dual P4 Xeon Dell PowerEdge 1600SC with a Fusion MPT SCSI
> controller and a ServerWorks CSB5 IDE chipset. All the HDs are on the
> SCSI bus, and only my CD reader and my DVD writer are on the IDE bus (one
> on each channel). Hyperthreading is enabled (4 logical processors). I am
> using GCC 3.2.2.
>
> The CD readers is the blacklisted 'SAMSUNG CD-ROM SC-148C' and I never use
> it so I can remove it if needed. The DVD writer is a 'SONY DVD RW
> DRU-500A'. Both are going through the ide-scsi driver. Whenever I
> read/write CDs in the DVD writer, I get very high system load (50% on one
> CPU), even though DMA seems to be enabled.
>
> In addition, I get horrible clock skew. After burning a 50 meg audio
> track, my clock is 10 seconds off. Enabled unmasked interrupts and 32 bit
> bus IO reduces the clock skew to about .1 seconds, but this adds up.
>
> I've tried everything, even downgrading to 2.4.20, although under 2.4.20 I
> can't seem to find an appropriate devfs entry to run hdparm on, so I'm
> unable to unmask interrupts and switch bus IO width. Not compiling the
> CSB5 driver doesn't make a difference either.
>
> Anyhow, anybody know what might be going on? Excerpts from the relevant
> files included below.
>
> Thanks, Ryan
>
>
> dmesg:
> Uniform Multi-Platform E-IDE driver Revision: 7.00beta4-2.4
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> SvrWks CSB5: IDE controller at PCI slot 00:0f.1
> SvrWks CSB5: chipset revision 147
> SvrWks CSB5: not 100% native mode: will probe irqs later
> ide0: BM-DMA at 0x08b0-0x08b7, BIOS settings: hda:DMA, hdb:pio
> ide1: BM-DMA at 0x08b8-0x08bf, BIOS settings: hdc:DMA, hdd:pio
> hda: SONY DVD RW DRU-500A, ATAPI CD/DVD-ROM drive
> hdc: SAMSUNG CD-ROM SC-148C, ATAPI CD/DVD-ROM drive
> hdc: Disabling (U)DMA for SAMSUNG CD-ROM SC-148C
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> hda: attached ide-scsi driver.
> hdc: attached ide-scsi driver.
> scsi1 : SCSI host adapter emulation for IDE ATAPI devices
> Vendor: SONY Model: DVD RW DRU-500A Rev: 2.0c
> Type: CD-ROM ANSI SCSI revision: 02
> Vendor: SAMSUNG Model: CD-ROM SC-148C Rev: B105
> Type: CD-ROM ANSI SCSI revision: 02
> Attached scsi CD-ROM sr0 at scsi1, channel 0, id 0, lun 0
> Attached scsi CD-ROM sr1 at scsi1, channel 0, id 1, lun 0
> sr0: scsi3-mmc drive: 32x/32x writer cd/rw xa/form2 cdda tray
> Uniform CD-ROM driver Revision: 3.12
> sr1: scsi3-mmc drive: 1x/48x cd/rw xa/form2 cdda tray
>
>
> .config:
> CONFIG_IDE=y
> CONFIG_BLK_DEV_IDE=y
> CONFIG_BLK_DEV_IDESCSI=m
> CONFIG_BLK_DEV_IDEPCI=y
> CONFIG_BLK_DEV_GENERIC=y
> CONFIG_BLK_DEV_IDEDMA_PCI=y
> CONFIG_IDEDMA_PCI_AUTO=y
> CONFIG_BLK_DEV_IDEDMA=y
> CONFIG_BLK_DEV_SVWKS=y
> CONFIG_IDEDMA_AUTO=y
> CONFIG_BLK_DEV_IDE_MODES=y
>
> CONFIG_SCSI=y
> CONFIG_BLK_DEV_SD=y
> CONFIG_SD_EXTRA_DEVS=40
> CONFIG_BLK_DEV_SR=m
> CONFIG_SR_EXTRA_DEVS=2
> CONFIG_CHR_DEV_SG=m
> CONFIG_SCSI_CONSTANTS=y
>
> CONFIG_FUSION=y
> CONFIG_FUSION_BOOT=y
> CONFIG_FUSION_MAX_SGE=40
> CONFIG_FUSION_ISENSE=m
>
>
> /proc/svwks (note that like others, this is being misidentified as only
> UDMA2 capable, when it should be UDMA5):
>
> ServerWorks OSB4/CSB5/CSB6
>
> ServerWorks CSB5 Chipset (rev 93)
> ------------------------------- General Status ---------------------------------
> --------------- Primary Channel ---------------- Secondary Channel -------------
> enabled enabled
> --------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------
> DMA enabled: yes no no no
> UDMA enabled: yes no no no
> UDMA enabled: 2 0 0 0
> DMA enabled: 2 2 ? 2
> PIO enabled: 4 0 4 0
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This archive was generated by hypermail 2b29 : Mon Jul 07 2003 - 22:00:24 EST