Changes for page Commands
Last modified by Julien Fleury on 2021/02/02 19:05
Change comment:
Update document after refactoring.
Summary
-
Page properties (1 modified, 0 added, 0 removed)
Details
- Page properties
-
- Content
-
... ... @@ -17,30 +17,4 @@ 17 17 down 18 18 {{/code}} 19 19 20 -== Test disk speed == 21 - 22 -dd command allows to copy all or parts of a disk by bytes block without impact from content structure of the disk. 23 - 24 -(% class="box infomessage" %) 25 -((( 26 -Do not use dd to duplicate a disk. Prefer ddrescue command 27 -))) 28 - 29 -Command structure 30 - 31 -(% class="box" %) 32 -((( 33 -dd if=<source> of=<target> bs=<block size> count=<number of blocks> oflag=<flag> 34 -))) 35 - 36 -oflag: 'dsync' to use synchronized I/O for data 37 - 38 -(% class="box warningmessage" %) 39 -((( 40 -Use dd command with caution as it can cause severe dammage to the system 41 -))) 42 - 43 - {{code language="shell"}}root@v2-dvp-sandbox-ixp-ubu-91:/home/ixp_adm# dd if=/dev/zero of=/tmp/test2.img bs=512 count=1000 oflag=dsync 44 -1000+0 records in 45 -1000+0 records out 46 -512000 bytes (512 kB, 500 KiB) copied, 1.22846 s, 417 kB/s{{/code}} 20 +