how to increase disc clonging speed [SOLVED]

agent114 · 2017-12-30 13:28:06

i am cloning DVDs to iso files on my pc and wondered if there is a way to increase the DVD read speed, I am using this command: pv </dev/sr0 > /image.iso. i have used dd before but setting a high block size is not recommeded in case of errors, is there another way of increasing disk speed

Last edited by agent114 (2017-12-30 16:02:59)

lo1 · 2017-12-30 14:13:55

https://bbs.archlinux.org/viewtopic.php?pid=1757085

I think first it would be better to answer to people who try to help you with your own issues, before opening a new help request which looks like a Twitter update and does not contain any useful information, being strictly related to your previous topic too.

seth · 2017-12-30 14:35:07

Not to mention that the post is just a collection of nonsense.
You use dd and when the drive spins down, that's usually because it has trouble reading the data at high speed. If you know the disk is toast, dd_rescue comes to the ... well.

You can control the drive speed eg. using hdparm, but if it's slow because you read bit-by-bit, that's not gonna help you and if it's slow because the disc is bad, it's not going to help you either.

Sanity check: what's the output of

uname -a | base32

agent114 · 2017-12-30 15:18:13

sorry for rubbish post, I am trying to clone DVDs to .iso files on an ext4 partition using dd, cat, and vb I have increased the block size and it doesnt make much difference, some discs will spinn up to an audible level and I want to do this relyably as the read speed increases from 3MB/s to about 12MB/s. I am doing this on known good discs.
output from uname -a | base32 is: JRUW45LYEB2G63JNMFZGG2CQIMQDILRRGQXDSLJRFVAVEQ2IEARTCICTJVICAUCSIVCU2UCUEBKH
KZJAIRSWGIBSGYQDAMB2GE4DUMZXEBKVIQZAGIYDCNZAPA4DMXZWGQQEOTSVF5GGS3TVPAFA====

seth · 2017-12-30 15:48:04

This relates to the ability of the drive to read the disc w/o errors.
You can attempt to send the sense codes to speed the drive up, but that will only result in more errors and the drive spinning down again.
You might want to try another drive (the plastic optics are not made to last forever) but usually just cleaning the disc works wonders ...

Slithery · 2017-12-30 15:51:57

If you're getting a higher speed on some rips than on others, then it's because some of your discs are damaged. The drive is slowing down to try and recover the damaged sectors.

agent114 · 2017-12-30 15:54:19

the discs I am currently cloning are brand new, tested known working fine

Trilby · 2017-12-30 15:59:56

Are they brand new, or are they tested?

Damaged may be a troublesome word. All DVDs have some level of imperfection. They may not pose any problem to watch them: they don't need to run at high speed to be played in a DVD player. But some imperfections can make high speed reading problematic.

The evidence you've presented in this thread suggests they have been tested (by your cloning attempts) and are imperfect.

agent114 · 2017-12-30 16:02:28

ok that sounds about right thanks guys, I guess I will jsut have to wait longer

Last edited by agent114 (2017-12-30 16:02:37)

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#1 2017-12-30 13:28:06

how to increase disc clonging speed [SOLVED]

#2 2017-12-30 14:13:55

Re: how to increase disc clonging speed [SOLVED]

#3 2017-12-30 14:35:07

Re: how to increase disc clonging speed [SOLVED]

#4 2017-12-30 15:18:13

Re: how to increase disc clonging speed [SOLVED]

#5 2017-12-30 15:48:04

Re: how to increase disc clonging speed [SOLVED]

#6 2017-12-30 15:51:57

Re: how to increase disc clonging speed [SOLVED]

#7 2017-12-30 15:54:19

Re: how to increase disc clonging speed [SOLVED]

#8 2017-12-30 15:59:56

Re: how to increase disc clonging speed [SOLVED]

#9 2017-12-30 16:02:28

Re: how to increase disc clonging speed [SOLVED]

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