Public bug reported: Hi,
Short summary: system has sata disk: [ 2.128771] ata3.00: ATA-8: Hitachi HDT721032SLA380, ST2OA31B, max UDMA/133 [ 2.128774] ata3.00: 625142448 sectors, multi 0: LBA48 NCQ (depth 31/32) [ 2.129689] ata3.00: configured for UDMA/133 works fine: sudo hdparm -tT /dev/sda /dev/sda: Timing cached reads: 4096 MB in 2.00 seconds = 2047.85 MB/sec Timing buffered disk reads: 270 MB in 3.02 seconds = 89.48 MB/sec and dvd drive: [ 2.114207] ata4.00: ATAPI: HL-DT-ST DVDRAM GH41N, MN01, max UDMA/100, ATAPI AN [ 2.118545] ata4.00: configured for UDMA/100 sudo hdparm -tT /dev/sda /dev/sr0: Timing cached reads: 450 MB in 2.00 seconds = 225.00 MB/sec Timing buffered disk reads: 4 MB in 3.23 seconds = 1.24 MB/sec k3b burns very slowly: 0.11x speed instead of 4x (as media allows). $ hdparm -i /dev/sr0 /dev/sr0: Model=HL-DT-ST, FwRev=MN01, SerialNo=K5Y9AP52302 Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic } RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0 BuffType=unknown, BuffSize=0kB, MaxMultSect=0 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 AdvancedPM=no Drive conforms to: unknown: ATA/ATAPI-3,4,5,6,7 * signifies the current active mode $ sudo hdparm -I /dev/sr0 /dev/sr0: ATAPI CD-ROM, with removable media Model Number: HL-DT-ST DVDRAM GH41N Serial Number: K5Y9AP52302 Firmware Revision: MN01 Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6 Standards: Likely used CD-ROM ATAPI-1 Configuration: DRQ response: 50us. Packet size: 12 bytes cache/buffer size = unknown Capabilities: LBA, IORDY(can be disabled) DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=120ns IORDY flow control=120ns seems like dma is not set for dvd drive, but dmesg claims dvd drive configured ok for dma: dmesg | grep ata [ 0.000000] BIOS-e820: 00000000cfeb0000 - 00000000cfebe000 (ACPI data) [ 0.000000] modified: 00000000cfeb0000 - 00000000cfebe000 (ACPI data) [ 0.000000] #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000] [ 0.000000] PERCPU: Embedded 30 pages at ffff880028022000, static data 90720 bytes [ 0.000000] Memory: 3917816k/4980736k available (5043k kernel code, 788228k absent, 274692k reserved, 2810k data, 652k init) [ 1.457405] Write protecting the kernel read-only data: 7180k [ 1.559651] libata version 3.00 loaded. [ 1.572183] pata_atiixp 0000:00:14.1: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 1.572212] pata_atiixp 0000:00:14.1: setting latency timer to 64 [ 1.577228] scsi0 : pata_atiixp [ 1.577334] scsi1 : pata_atiixp [ 1.578378] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xff00 irq 14 [ 1.578380] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xff08 irq 15 [ 1.582917] ata3: SATA max UDMA/133 abar m1...@0xf9fffc00 port 0xf9fffd00 irq 29 [ 1.582920] ata4: SATA max UDMA/133 abar m1...@0xf9fffc00 port 0xf9fffd80 irq 29 [ 1.582923] ata5: SATA max UDMA/133 abar m1...@0xf9fffc00 port 0xf9fffe00 irq 29 [ 1.582926] ata6: SATA max UDMA/133 abar m1...@0xf9fffc00 port 0xf9fffe80 irq 29 [ 1.921827] ata6: SATA link down (SStatus 0 SControl 300) [ 1.933806] ata5: SATA link down (SStatus 0 SControl 300) [ 2.110057] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 2.110082] ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 2.114207] ata4.00: ATAPI: HL-DT-ST DVDRAM GH41N, MN01, max UDMA/100, ATAPI AN [ 2.118545] ata4.00: configured for UDMA/100 [ 2.128771] ata3.00: ATA-8: Hitachi HDT721032SLA380, ST2OA31B, max UDMA/133 [ 2.128774] ata3.00: 625142448 sectors, multi 0: LBA48 NCQ (depth 31/32) [ 2.129689] ata3.00: configured for UDMA/133 [ 3.397314] EXT4-fs (sda5): mounted filesystem with ordered data mode I've rebuild the kernel in order to put all libata into loadable modules and blacklisted ata_generic lsmod|grep ata pata_amd 14628 0 pata_acpi 5312 0 pata_atiixp 6048 0 libata 201068 4 pata_amd,pata_acpi,ahci,pata_atiixp It didn't help in improving dvd burning speed. Happy New Year! Thanks, Alexander ** Affects: ubuntu Importance: Undecided Status: New -- dvd write is extremely slow on kubuntu 9.10 https://bugs.launchpad.net/bugs/501131 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs