Comment 10 for bug 52666

thgreasi (thgreasi) wrote :

Can confirm slow burning speeds (since ubuntu 8.04 to 9.10), both on my old pc:
Pentium 4 2gb ram with an IDE plextor drive
and my new:
i7 4gb ram with sata drive SONY OPTIARC AD-5240S.
Both have SWAP disabled.
In more detail, last night tried to burn an iso to a DL-DVD at x8 using nerolinux.
The read buffer was all the time full, but the dvd recorder`s buffer dropped all the time (to 4%).
So it seems it is not a low memory or slow file-system problem
Have also tried brasero and k3b in the past, getting the same results.

Using windows, I have been able to write dvd`s at x24 even on the Pentium 4 machine.

hdparm -i /dev/dvd

/dev/dvd:
 HDIO_DRIVE_CMD(identify) failed: Bad address

 Model=Optiarc, FwRev=1.02, SerialNo=
 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 pio1 pio2 pio3 pio4
 DMA modes: mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
 AdvancedPM=no
 Drive conforms to: Unspecified: ATA/ATAPI-3,4,5,6,7

 * signifies the current active mode