Nero Burning Rom scire incet

[adi2004]

Deci daca scriu un DVD cu 4.400.000kb pe el la viteza de 18x (24.930kb/s) ar trebui sa dureze aporzimativ 3 minute. (programul estimeaza cam 4min si 1/2). De ce mie imi ia aproximativ 25-30 min?

[Cosmin_C]

Nu e de la soft ci de la DMA, probabil; la citire cum merge ?

[adi2004]

Dupa ce l-am scris merge bine citirea. Daca probelma e de la DMA, ce as putea sa fac?

[Cosmin_C]

Testeaza citirea cu Nero DiscSpeed si vezi la ce viteza e citit; ar trebui sa inceapa pe la 8x si sa ajunga cam la 16x la final, daca viteza de citire e mai mica si se mentine oarecum constanta inseamna ca unitatea iti merge in PIO in loc de UDMA... in cazul asta il activezi asa:

Under Windows 2000/XP the DMA mode can be activated for each controller.
* To activate you should start the device manager (Start -> Settings -> Control Panel -> System -> Hardware) select "Device Manager".
* Now expand the "IDE ATA/ ATAPI Controller" and select your IDE channel, now right mouse button -> "Properties" and select the tab "Advanced Settings".
* Within the boxes "Device 0" and "Device 1" you can select the "transfer mode" for the particular device attached to the channel. Change the transfer mode to "DMA, if available" to activate the DMA mode.
* You can find the currently used transfer mode under "Current transfer mode".

[adi2004]

Mersi mult Cosmic_C!

Intr-adevar lucra PIO mode, desi din setari am selectat "DMA if available". La mine DVD-writerul era pus pe primary IDE channel, Master (hardiscurile fiind SATA). Dupa ce l-am mutat pe secondary IDE channel, Master, merge in "Ultra DMA Mode 2". De ce nu a mers de prima data pe primary?

PS: - acum ii fac un update de firmware
- interesanta chestia cu viteza de citire. Se pare ca citeste mai repede sau mai incet in functie de unde sunt pozitionate fisierele pe DVD (de ex, la mine viteza poate varia intre 11000KB/s si 21000KB/s).

[Cosmin_C]

Aveam eu o banuiala... bazata pe experiente anterioare. Spor la arderi.

[aurasdoom]

Originally Posted by adi2004

PS: - acum ii fac un update de firmware
- interesanta chestia cu viteza de citire. Se pare ca citeste mai repede sau mai incet in functie de unde sunt pozitionate fisierele pe DVD (de ex, la mine viteza poate varia intre 11000KB/s si 21000KB/s).

Se numeste CAV = constant angular velocity, adica se misca cu viteza unghiulara constanta indiferent de pista. La inceputul discului pista e mai scurta decat pista de la periferie deci se citesc mai putine date in acelasi timp fata de periferia discului

[Doctor Bonez]

Originally Posted by adi2004

- interesanta chestia cu viteza de citire. Se pare ca citeste mai repede sau mai incet in functie de unde sunt pozitionate fisierele pe DVD (de ex, la mine viteza poate varia intre 11000KB/s si 21000KB/s).

Da, majoritatea fac asa.

Originally Posted by Wikipedia

Zoned Constant Linear Velocity (ZCLV) is a modification of CLV for high speed CD and DVD recorders. Early model recorders were CLV drives. The recording speed on such drives was rated in multiples of 150 KiB/s; a 4X drive, for instance, would write steadily at around 600 KiB/s. The transfer rate was kept constant by having the spindle motor in the drive vary in speed and run about 2.5 times as fast when recording at the inner rim of the disc as on the outer rim. High-speed recorders use the zoned CLV method (ZCLV), which divides the disc into stepped zones, each of which has its own constant linear velocity. At higher speeds, ZCLV offers a compromise between CAV, which enables faster seek times, and CLV, which enables greater storage capacity. A ZCLV recorder rated at "52X", for example, would write at 20X on the innermost zone and then progressively step up to 52X at the outer rim. DVDs have as many as 24 ZCLV zones.

Sursa: http://en.wikipedia.org/wiki/Constant_linear_velocity