Timeline for Why dd takes too long?
Current License: CC BY-SA 4.0
22 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 21, 2021 at 20:44 | comment | added | Florian F | The speed also depends on how the disk is connected. If both are external disks connected on the same USB hub then performance will suffer. If they are internal on distinct disk controllers, it will be much faster. | |
| Jan 23, 2020 at 13:52 | history | edited | KKD | CC BY-SA 4.0 | added 16 characters in body |
| Nov 19, 2016 at 4:02 | vote | accept | KKD | ||
| Nov 17, 2016 at 7:09 | comment | added | Rui F Ribeiro | Why dd for big disks? use tar... in a phone or would write a proper answer. | |
| Nov 15, 2016 at 12:00 | comment | added | KKD | @marcelm I used command dd if=/dev/sda of=/dev/rdsk in both HPUX and solaris it's fast in both as of rdsk. Required point is I need to copy the disk much faster as like I have used HPUX and Solaris. | |
| Nov 11, 2016 at 12:24 | comment | added | marcelm | @KDD Sooo, the command is slow on the HP-UX machine, but fast on the Solaris machine? How do the hard disks differ (size, speed grade, etc)? It's really impossible to answer your question with the level of detail you provide. | |
| Nov 11, 2016 at 4:17 | history | edited | KKD | CC BY-SA 3.0 | added 12 characters in body |
| Nov 11, 2016 at 4:15 | comment | added | KKD | Used the first in HP-UX (Integrity blade) and earlier used Solaris machine as well. | |
| Nov 10, 2016 at 18:22 | answer | added | Roger Heathcote | timeline score: 10 | |
| Nov 10, 2016 at 15:32 | comment | added | Dmitry Grigoryev | Welcome to dd pitfall #1 | |
| Nov 10, 2016 at 13:13 | comment | added | marcelm | "I have tried the same on a Unix system" - So on what type of system did you try the first, if not a Unix? Also, what hardware, etc, yaddayadda. | |
| Nov 10, 2016 at 12:44 | comment | added | Gilles 'SO- stop being evil' | @StéphaneChazelas cat may be even quicker but the difference isn't that dramatic (maybe bigger for device-to-device than file-to-file as in my experiment). | |
| Nov 10, 2016 at 12:10 | history | edited | Braiam | CC BY-SA 3.0 | edited title |
| S Nov 10, 2016 at 9:44 | history | edited | Thor | CC BY-SA 3.0 | grammar and wording changes |
| S Nov 10, 2016 at 9:44 | history | suggested | Erik | CC BY-SA 3.0 | grammar and wording changes |
| Nov 10, 2016 at 9:34 | answer | added | Chris Davies | timeline score: 24 | |
| Nov 10, 2016 at 9:27 | comment | added | Stéphane Chazelas | cp /dev/sda /dev/sdb or (pv /dev/sda > /dev/sdb to get a progress bar) would be a lot quicker. Why would you use dd here? dd would only be useful with things like conv=sync,noerror to handle disks with errors, but even then it would make more sense to use things like ddrescue instead (see also pv's -E option). | |
| Nov 10, 2016 at 9:21 | history | tweeted | twitter.com/StackUnix/status/796643839318622209 | ||
| Nov 10, 2016 at 9:04 | review | Suggested edits | |||
| S Nov 10, 2016 at 9:44 | |||||
| Nov 10, 2016 at 6:52 | answer | added | elbarna | timeline score: 6 | |
| Nov 10, 2016 at 5:44 | answer | added | Basile Starynkevitch | timeline score: 49 | |
| Nov 10, 2016 at 5:40 | history | asked | KKD | CC BY-SA 3.0 |