4x drops down to 2.8x during burning

  • Thread starter Thread starter Mitchua
  • Start date Start date
J said:
Heck, I'd just be glad I got something working properly in Linux, being
that I'm not super-fluent in *nix OS.

Anyway, check by chance - man hdparm - and see if the bus you're using for
burning is set to maximum throughput, UDMA2 or SCSIUW or whatever your bus
drive is on. Also, if you've got the room, be sure to place the drive on
it's own IDE cable apart from other devices such as CD drives, DVD
readers, HDDs. Unless both items are the same speed you may end up running
both at the lowest transfer rate, so even at 52x, a CD-ROM in PIO mode may
default the entire bus to PIO and I'd imagine you'll want full DMA to get
your 4x out of the burner...

Good luck!
Jon
Click to expand...

Oh, one more thing. I checked with that command and DMA is turned on for my
burner drive:

# hdparm /dev/hdc

/dev/hdc:
HDIO_GET_MULTCOUNT failed: Invalid argument
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
HDIO_GETGEO failed: Invalid argument
 
I start it burning using k3b/growisofs, it
doesn't seem able to sustain 4x and it always drops down to about 2.8x and
stays there. All the data is written on the disk correctly but why am I
not getting the 4x speed? Is my bus not fast enough to support these
speeds or something?

Thanks for your help,
Mitchua
Click to expand...

Heck, I'd just be glad I got something working properly in Linux, being that
I'm not super-fluent in *nix OS.

Anyway, check by chance - man hdparm - and see if the bus you're using for
burning is set to maximum throughput, UDMA2 or SCSIUW or whatever your bus
drive is on. Also, if you've got the room, be sure to place the drive on
it's own IDE cable apart from other devices such as CD drives, DVD readers,
HDDs. Unless both items are the same speed you may end up running both at
the lowest transfer rate, so even at 52x, a CD-ROM in PIO mode may default
the entire bus to PIO and I'd imagine you'll want full DMA to get your 4x
out of the burner...

Good luck!
Jon
 
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