* Re: serverworks CSB5 IDE: DMA disabled on secondary channel [not found] <fa.Fmf0CiaCc/J+JAWaZ5FS+ihhhzA@ifi.uio.no> @ 2008-07-18 1:09 ` Robert Hancock 2008-07-18 2:29 ` Frantisek Hanzlik 2008-07-18 9:06 ` Alan Cox 0 siblings, 2 replies; 6+ messages in thread From: Robert Hancock @ 2008-07-18 1:09 UTC (permalink / raw) To: Frantisek Hanzlik; +Cc: linux-kernel Frantisek Hanzlik wrote: > Server with Intel SHG2 board, servervorks CSB5 rev. 93: After > upgrade from kernel 2.6.22 (IDE serverworks driver) to 2.6.25 > (Fedora 9: libata+pata_serverworks driver), SW RAID1 performance > is very bad. Problem is probably with secondary IDE channel, > which has disabled DMA: > > # hdparm -Tt /dev/sda > /dev/sda: > Timing cached reads: 828 MB in 2.00 seconds = 414.26 MB/sec > Timing buffered disk reads: 210 MB in 3.01 seconds = 69.83 MB/sec > > # hdparm -Tt /dev/sdb > /dev/sdb: > Timing cached reads: 408 MB in 2.00 seconds = 203.72 MB/sec > Timing buffered disk reads: 6 MB in 3.05 seconds = 1.96 MB/sec > > dmesg output: > .. > libata version 3.00 loaded. > PCI: Setting latency timer of device 0000:00:0f.1 to 64 > scsi0 : pata_serverworks > scsi1 : pata_serverworks > ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x2440 irq 14 > ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x2448 irq 15 > ata1.00: ATA-7: ST3400620A, 3.AAE, max UDMA/100 > ata1.00: 781422768 sectors, multi 16: LBA48 > ata1.01: ATAPI: TOSHIBA DVD-ROM SD-M1612, 1004, max UDMA/33 > ata1.00: configured for UDMA/100 > ata1.01: configured for UDMA/33 > ata2.00: ATA-7: ST3400620A, 3.AAE, max UDMA/100 > ata2.00: 781422768 sectors, multi 16: LBA48 > ata2.01: ATAPI: CD-W540E, 1.0D, max UDMA/33 > ata2.00: simplex DMA is claimed by other device, disabling DMA > ata2.01: simplex DMA is claimed by other device, disabling DMA > ata2.00: configured for PIO4 > ata2.01: configured for PIO4 > .. > > # lsmod|grep ata > pata_serverworks 10496 8 > pata_acpi 8320 0 > libata 127328 2 pata_serverworks,pata_acpi > scsi_mod 120948 4 sg,sr_mod,libata,sd_mod > > It's some sort of pata_serverworks bug, or is needed any special > setup for this driver to work? > What is "simplex DMA" term? It means this controller can only do DMA on the primary or secondary channel, not both at the same time. It looks like libata currently deals with this by disabling DMA on the secondary channel. Not sure how the old IDE stuff handled it? ServerWorks IDE always seemed to pretty much suck, I always got the impression that they stuck it on there as an afterthought just to operate a CD drive enough to install the OS.. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: serverworks CSB5 IDE: DMA disabled on secondary channel 2008-07-18 1:09 ` serverworks CSB5 IDE: DMA disabled on secondary channel Robert Hancock @ 2008-07-18 2:29 ` Frantisek Hanzlik 2008-07-18 9:06 ` Alan Cox 1 sibling, 0 replies; 6+ messages in thread From: Frantisek Hanzlik @ 2008-07-18 2:29 UTC (permalink / raw) To: Robert Hancock; +Cc: linux-kernel Robert Hancock wrote: > Frantisek Hanzlik wrote: >> Server with Intel SHG2 board, servervorks CSB5 rev. 93: After >> upgrade from kernel 2.6.22 (IDE serverworks driver) to 2.6.25 >> (Fedora 9: libata+pata_serverworks driver), SW RAID1 performance >> is very bad. Problem is probably with secondary IDE channel, >> which has disabled DMA: >> >> # hdparm -Tt /dev/sda >> /dev/sda: >> Timing cached reads: 828 MB in 2.00 seconds = 414.26 MB/sec >> Timing buffered disk reads: 210 MB in 3.01 seconds = 69.83 MB/sec >> >> # hdparm -Tt /dev/sdb >> /dev/sdb: >> Timing cached reads: 408 MB in 2.00 seconds = 203.72 MB/sec >> Timing buffered disk reads: 6 MB in 3.05 seconds = 1.96 MB/sec >> >> dmesg output: >> .. >> libata version 3.00 loaded. >> PCI: Setting latency timer of device 0000:00:0f.1 to 64 >> scsi0 : pata_serverworks >> scsi1 : pata_serverworks >> ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x2440 irq 14 >> ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x2448 irq 15 >> ata1.00: ATA-7: ST3400620A, 3.AAE, max UDMA/100 >> ata1.00: 781422768 sectors, multi 16: LBA48 >> ata1.01: ATAPI: TOSHIBA DVD-ROM SD-M1612, 1004, max UDMA/33 >> ata1.00: configured for UDMA/100 >> ata1.01: configured for UDMA/33 >> ata2.00: ATA-7: ST3400620A, 3.AAE, max UDMA/100 >> ata2.00: 781422768 sectors, multi 16: LBA48 >> ata2.01: ATAPI: CD-W540E, 1.0D, max UDMA/33 >> ata2.00: simplex DMA is claimed by other device, disabling DMA >> ata2.01: simplex DMA is claimed by other device, disabling DMA >> ata2.00: configured for PIO4 >> ata2.01: configured for PIO4 >> .. >> >> # lsmod|grep ata >> pata_serverworks 10496 8 >> pata_acpi 8320 0 >> libata 127328 2 pata_serverworks,pata_acpi >> scsi_mod 120948 4 sg,sr_mod,libata,sd_mod >> >> It's some sort of pata_serverworks bug, or is needed any special >> setup for this driver to work? >> What is "simplex DMA" term? > > It means this controller can only do DMA on the primary or secondary > channel, not both at the same time. It looks like libata currently deals > with this by disabling DMA on the secondary channel. Not sure how the > old IDE stuff handled it? > > ServerWorks IDE always seemed to pretty much suck, I always got the > impression that they stuck it on there as an afterthought just to > operate a CD drive enough to install the OS.. > I'm sure on 2.6.22/IDE serverworks all worked fine and quickly. And it was same HW configuration, disk partitioning unchanged and all partition/RAID1 had same functions and type - SW RAID1 and ext3 fs. Simply on /dev/md0 was system (all except "/home"), and md0 has now been mke2fs-ed and Fedora 9 installed on it. I no more can test it with 2.6.22, but I have its dmesg: ... ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx SvrWks CSB5: IDE controller at PCI slot 0000:00:0f.1 SvrWks CSB5: chipset revision 147 SvrWks CSB5: not 100% native mode: will probe irqs later ide0: BM-DMA at 0x2440-0x2447, BIOS settings: hda:DMA, hdb:DMA ide1: BM-DMA at 0x2448-0x244f, BIOS settings: hdc:DMA, hdd:DMA Probing IDE interface ide0... hda: ST3400620A, ATA DISK drive hdb: TOSHIBA DVD-ROM SD-M1612, ATAPI CD/DVD-ROM drive hda: selected mode 0x22 hdb: selected mode 0x22 ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 Probing IDE interface ide1... hdc: ST3400620A, ATA DISK drive hdd: CD-W540E, ATAPI CD/DVD-ROM drive hdc: selected mode 0x22 hdd: selected mode 0x22 ide1 at 0x170-0x177,0x376 on irq 15 hda: max request size: 512KiB hda: 781422768 sectors (400088 MB) w/16384KiB Cache, CHS=48641/255/63, (U)DMA hda: cache flushes supported hda: hda1 hda2 hda3 hda4 hdc: max request size: 512KiB hdc: 781422768 sectors (400088 MB) w/16384KiB Cache, CHS=48641/255/63, (U)DMA hdc: cache flushes supported hdc: hdc1 hdc2 hdc3 hdc4 ... md: Autodetecting RAID arrays. md: autorun ... md: considering hdc4 ... md: adding hdc4 ... md: hdc3 has different UUID to hdc4 md: hdc1 has different UUID to hdc4 md: adding hda4 ... md: hda3 has different UUID to hdc4 md: hda1 has different UUID to hdc4 md: created md2 md: bind<hda4> md: bind<hdc4> md: running: <hdc4><hda4> raid1: raid set md2 active with 2 out of 2 mirrors md: considering hdc3 ... md: adding hdc3 ... md: hdc1 has different UUID to hdc3 md: adding hda3 ... md: hda1 has different UUID to hdc3 md: created md1 md: bind<hda3> md: bind<hdc3> md: running: <hdc3><hda3> raid1: raid set md1 active with 2 out of 2 mirrors md: considering hdc1 ... md: adding hdc1 ... md: adding hda1 ... md: created md0 md: bind<hda1> md: bind<hdc1> md: running: <hdc1><hda1> raid1: raid set md0 active with 2 out of 2 mirrors md: ... autorun DONE. ... md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. device-mapper: ioctl: 4.11.0-ioctl (2006-10-12) initialised: dm-devel@redhat.com device-mapper: multipath: version 1.0.5 loaded EXT3 FS on md0, internal journal kjournald starting. Commit interval 5 seconds EXT3 FS on md1, internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS on md2, internal journal EXT3-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds EXT3 FS on rd/c0d0p1, internal journal EXT3-fs: mounted filesystem with ordered data mode. Adding 1606492k swap on /dev/hdc2. Priority:-1 extents:1 across:1606492k Adding 1606492k swap on /dev/hda2. Priority:-2 extents:1 across:1606492k ... One thing I not fully understood - I have "hdparm -i" outputs for both old and new installations, and they are different in dma settings: OLD cfg: 2.6.22 kernel, hdparm 6.6-2 (Fedora 6): # hdparm -i /dev/hda /dev/hda: Model=ST3400620A, FwRev=3.AAE, SerialNo=5QH08VS5 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=16 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 *mdma2 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 AdvancedPM=no WriteCache=enabled Drive conforms to: Unspecified: ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7 * signifies the current active mode # hdparm -i /dev/hdc /dev/hdc: Model=ST3400620A, FwRev=3.AAE, SerialNo=5QG0GHTG Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=16 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 *mdma2 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 AdvancedPM=no WriteCache=enabled Drive conforms to: Unspecified: ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7 * signifies the current active mode NEW cfg: 2.6.25 kernel, hdparm 8.6-1 (Fedora 9): # hdparm -i /dev/sda /dev/sda: Model=ST3400620A , FwRev=3.AAE , SerialNo= 5QH08VS5 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=?16? CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=781422768 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 AdvancedPM=no WriteCache=enabled Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6,7 * signifies the current active mode # hdparm -i /dev/sdb /dev/sdb: Model=ST3400620A , FwRev=3.AAE , SerialNo= 5QG0GHTG Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 BuffType=unknown, BuffSize=16384kB, MaxMultSect=16, MultSect=?16? CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=781422768 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 AdvancedPM=no WriteCache=enabled Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6,7 * signifies the current active mode with old kernel hdparm show for both drives multiword DMA setting, with new kernel UDMA5 setting - it's weird some way, because as hdparm man page say about "-i" switch: Display the identification info that was obtained from the drive at boot time... then 1) Should not be boot time settings for both kernels same? 2) maybe BIOS set both drives to UDMA mode, but then driver disabled DMA for second channel/drive. Regardless this discrepances, truth is, old system has worked fine, in contrast with new kernel. What now? Franta Hanzlik ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: serverworks CSB5 IDE: DMA disabled on secondary channel 2008-07-18 1:09 ` serverworks CSB5 IDE: DMA disabled on secondary channel Robert Hancock 2008-07-18 2:29 ` Frantisek Hanzlik @ 2008-07-18 9:06 ` Alan Cox 2008-07-19 2:45 ` Frantisek Hanzlik 1 sibling, 1 reply; 6+ messages in thread From: Alan Cox @ 2008-07-18 9:06 UTC (permalink / raw) To: Robert Hancock; +Cc: Frantisek Hanzlik, linux-kernel > > ata2.01: ATAPI: CD-W540E, 1.0D, max UDMA/33 > > ata2.00: simplex DMA is claimed by other device, disabling DMA > > ata2.01: simplex DMA is claimed by other device, disabling DMA > > ata2.00: configured for PIO4 > > ata2.01: configured for PIO4 Disable the pata_acpi driver and let me know if it then behaves. We had a similar problem with the ATI hardware which lost and messed up its internal state if pata_acpi was loaded first. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: serverworks CSB5 IDE: DMA disabled on secondary channel 2008-07-18 9:06 ` Alan Cox @ 2008-07-19 2:45 ` Frantisek Hanzlik 2008-07-19 8:46 ` Alan Cox 0 siblings, 1 reply; 6+ messages in thread From: Frantisek Hanzlik @ 2008-07-19 2:45 UTC (permalink / raw) To: Alan Cox; +Cc: Robert Hancock, linux-kernel Alan Cox wrote: >>> ata2.01: ATAPI: CD-W540E, 1.0D, max UDMA/33 >>> ata2.00: simplex DMA is claimed by other device, disabling DMA >>> ata2.01: simplex DMA is claimed by other device, disabling DMA >>> ata2.00: configured for PIO4 >>> ata2.01: configured for PIO4 > > > Disable the pata_acpi driver and let me know if it then behaves. We had a > similar problem with the ATI hardware which lost and messed up its > internal state if pata_acpi was loaded first. > Before I post to lkml I tried disable ata_generic driver, (which was loaded before pata_serverworks too, my mail already not show it as is blacklisted), but this not solved problem. YES, problem was in pata_acpi, after disabling it all works fine (no matter if is ata_generic enabled and loaded before pata_serverworks or not). What is the meaning of "simplex DMA is claimed..." I probably must learn in sources itself ;) Many thanks, Alan, You are big magicians! dmesg: ... libata version 3.00 loaded. scsi0 : pata_serverworks scsi1 : pata_serverworks ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x2440 irq 14 ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x2448 irq 15 ata1.00: ATA-7: ST3400620A, 3.AAE, max UDMA/100 ata1.00: 781422768 sectors, multi 16: LBA48 ata1.01: ATAPI: TOSHIBA DVD-ROM SD-M1612, 1004, max UDMA/33 ata1.00: configured for UDMA/100 ata1.01: configured for UDMA/33 ata2.00: ATA-7: ST3400620A, 3.AAE, max UDMA/100 ata2.00: 781422768 sectors, multi 16: LBA48 ata2.01: ATAPI: CD-W540E, 1.0D, max UDMA/33 ata2.00: configured for UDMA/100 ata2.01: configured for UDMA/33 scsi 0:0:0:0: Direct-Access ATA ST3400620A 3.AA PQ: 0 ANSI: 5 sd 0:0:0:0: [sda] 781422768 512-byte hardware sectors (400088 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 0:0:0:0: [sda] 781422768 512-byte hardware sectors (400088 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sda: sda1 sda2 sda3 sda4 sd 0:0:0:0: [sda] Attached SCSI disk scsi 0:0:1:0: CD-ROM TOSHIBA DVD-ROM SD-M1612 1004 PQ: 0 ANSI: 5 scsi 1:0:0:0: Direct-Access ATA ST3400620A 3.AA PQ: 0 ANSI: 5 sd 1:0:0:0: [sdb] 781422768 512-byte hardware sectors (400088 MB) sd 1:0:0:0: [sdb] Write Protect is off sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00 sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 1:0:0:0: [sdb] 781422768 512-byte hardware sectors (400088 MB) sd 1:0:0:0: [sdb] Write Protect is off sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00 sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sdb: sdb1 sdb2 sdb3 sdb4 sd 1:0:0:0: [sdb] Attached SCSI disk scsi 1:0:1:0: CD-ROM TEAC CD-W540E 1.0D PQ: 0 ANSI: 5 md: md0 stopped. md: bind<sdb1> md: bind<sda1> raid1: raid set md0 active with 2 out of 2 mirrors kjournald starting. Commit interval 5 seconds EXT3-fs: mounted filesystem with ordered data mode. ... # hdparm -Tt /dev/sda /dev/sda: Timing cached reads: 732 MB in 2.00 seconds = 366.18 MB/sec Timing buffered disk reads: 206 MB in 3.01 seconds = 68.40 MB/sec # hdparm -Tt /dev/sdb /dev/sdb: Timing cached reads: 806 MB in 2.00 seconds = 402.65 MB/sec Timing buffered disk reads: 202 MB in 3.03 seconds = 66.72 MB/sec ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: serverworks CSB5 IDE: DMA disabled on secondary channel 2008-07-19 2:45 ` Frantisek Hanzlik @ 2008-07-19 8:46 ` Alan Cox 0 siblings, 0 replies; 6+ messages in thread From: Alan Cox @ 2008-07-19 8:46 UTC (permalink / raw) To: Frantisek Hanzlik; +Cc: Robert Hancock, linux-kernel On Sat, 19 Jul 2008 04:45:59 +0200 Frantisek Hanzlik <franta@hanzlici.cz> wrote: > Alan Cox wrote: > >>> ata2.01: ATAPI: CD-W540E, 1.0D, max UDMA/33 > >>> ata2.00: simplex DMA is claimed by other device, disabling DMA > >>> ata2.01: simplex DMA is claimed by other device, disabling DMA > >>> ata2.00: configured for PIO4 > >>> ata2.01: configured for PIO4 > > > > > > Disable the pata_acpi driver and let me know if it then behaves. We had a > > similar problem with the ATI hardware which lost and messed up its > > internal state if pata_acpi was loaded first. > > > Before I post to lkml I tried disable ata_generic driver, (which was loaded > before pata_serverworks too Thanks - please complain to your distribution vendor if they are not following the docs and loading pata_acpi then ata_generic then ata_legacy *AFTER* other drivers. ^ permalink raw reply [flat|nested] 6+ messages in thread
* serverworks CSB5 IDE: DMA disabled on secondary channel @ 2008-07-17 17:12 Frantisek Hanzlik 0 siblings, 0 replies; 6+ messages in thread From: Frantisek Hanzlik @ 2008-07-17 17:12 UTC (permalink / raw) To: linux-kernel Server with Intel SHG2 board, servervorks CSB5 rev. 93: After upgrade from kernel 2.6.22 (IDE serverworks driver) to 2.6.25 (Fedora 9: libata+pata_serverworks driver), SW RAID1 performance is very bad. Problem is probably with secondary IDE channel, which has disabled DMA: # hdparm -Tt /dev/sda /dev/sda: Timing cached reads: 828 MB in 2.00 seconds = 414.26 MB/sec Timing buffered disk reads: 210 MB in 3.01 seconds = 69.83 MB/sec # hdparm -Tt /dev/sdb /dev/sdb: Timing cached reads: 408 MB in 2.00 seconds = 203.72 MB/sec Timing buffered disk reads: 6 MB in 3.05 seconds = 1.96 MB/sec dmesg output: ... libata version 3.00 loaded. PCI: Setting latency timer of device 0000:00:0f.1 to 64 scsi0 : pata_serverworks scsi1 : pata_serverworks ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x2440 irq 14 ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x2448 irq 15 ata1.00: ATA-7: ST3400620A, 3.AAE, max UDMA/100 ata1.00: 781422768 sectors, multi 16: LBA48 ata1.01: ATAPI: TOSHIBA DVD-ROM SD-M1612, 1004, max UDMA/33 ata1.00: configured for UDMA/100 ata1.01: configured for UDMA/33 ata2.00: ATA-7: ST3400620A, 3.AAE, max UDMA/100 ata2.00: 781422768 sectors, multi 16: LBA48 ata2.01: ATAPI: CD-W540E, 1.0D, max UDMA/33 ata2.00: simplex DMA is claimed by other device, disabling DMA ata2.01: simplex DMA is claimed by other device, disabling DMA ata2.00: configured for PIO4 ata2.01: configured for PIO4 ... # lsmod|grep ata pata_serverworks 10496 8 pata_acpi 8320 0 libata 127328 2 pata_serverworks,pata_acpi scsi_mod 120948 4 sg,sr_mod,libata,sd_mod It's some sort of pata_serverworks bug, or is needed any special setup for this driver to work? What is "simplex DMA" term? Thanks, Franta Hanzlik ^ permalink raw reply [flat|nested] 6+ messages in thread
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[not found] <fa.Fmf0CiaCc/J+JAWaZ5FS+ihhhzA@ifi.uio.no>
2008-07-18 1:09 ` serverworks CSB5 IDE: DMA disabled on secondary channel Robert Hancock
2008-07-18 2:29 ` Frantisek Hanzlik
2008-07-18 9:06 ` Alan Cox
2008-07-19 2:45 ` Frantisek Hanzlik
2008-07-19 8:46 ` Alan Cox
2008-07-17 17:12 Frantisek Hanzlik
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