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OdinsDream
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 Posted: Fri May 02, 2003 3:35 pm Post subject: Checking progress of dd command, when will it finish? |
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I'm copying one harddrive to another, identical drive. The source harddrive is the primary slave. The destination blank drive is secondary master.
I started the command: dd if=/dev/hdb of=/dev/hdc quite awhile ago. Nearly 10 hours. How long should it take to copy 120 GB of information?
Is there a method to check on the progress of dd? Some way to tell where it is in the operation?
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magnet
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Joined: 16 Mar 2003
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Location: france
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| Posted: Fri May 02, 2003 6:07 pm Post subject: |
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umm this can be hard to guess....here his what I'd do :
first stop the dd with crtl +Z , then benchmark my hds, calculate necessary time, removing elapsed time.this should give you a reasonable approximation.
after start again the dd with 'fg' .
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OdinsDream
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| Posted: Fri May 02, 2003 7:36 pm Post subject: |
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| magnet wrote: | umm this can be hard to guess....here his what I'd do :
first stop the dd with crtl +Z , then benchmark my hds, calculate necessary time, removing elapsed time.this should give you a reasonable approximation.
after start again the dd with 'fg' . |
Hmm, I am unable to stop it with CTRL Z, or CTRL C... I switched to another console, and tried killing the process, which didn't work.
I ran hdparm -tT /dev/hdc which never came back, and also didn't die. What could be wrong here?
Right now I'm waiting at:
flushing ide devices: hda hdb hdc _
After asking the system to shutdown. Something must be wrong.
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OdinsDream
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| Posted: Fri May 02, 2003 8:23 pm Post subject: |
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More information:
When I enable DMA on hdc, with: hdparm -d1 /dev/hdc, although I get confirmation, any subsequent disk access fails, and the program hangs.
For instance:
| Code: |
p2c2e root # hdparm -tT /dev/hdc
/dev/hdc
Timing buffer-cache reads: 128MB in 0.66 seconds = 193.94 MB/sec
Timing buffered disk reads: 64MB in 16.79 seconds = 3.81 MB/sec
p2c2e root # hdparm -d1 /dev/hdc
/dev/hdc:
setting using_dma to 1 (on)
using_dma = 1 (on)
p2c2e root # hdparm -tT /dev/hdc
/dev/hdc:
_
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At this point, the hdparm program hangs. The cursor blinks, but I cannot kill it with another console, nor can I do anything to stop it. When I shutdown the system, I get the same problem with "flushing ide devices: hda hdb hdc _"
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dma
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Joined: 31 Jan 2003
Posts: 437
Location: Charlotte, NC, USA
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| Posted: Sat May 03, 2003 5:13 am Post subject: |
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I suggest you take a look at sys-apps/buffer!!!
| Code: | * sys-apps/buffer
Latest version available: 1.19-r1
Latest version installed: [ Not Installed ]
Size of downloaded files: 34 kB
Homepage: http://www.microwerks.net/~hugo/download.html
Description: a tapedrive tool for speeding up reading from and writing to tape
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Here's an example:
| Code: | root@laureate:~# buffer -i /dev/video1 -o ee.xx -z 32k
8096K
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Home Page:
http://www.microwerks.net/~hugo/download.html
More Info:
http://www.geocrawler.com/archives/3/163/2001/9/0/6714478/ |
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OdinsDream
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Joined: 01 Jun 2002
Posts: 1057
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| Posted: Sat May 03, 2003 5:19 am Post subject: |
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| dma wrote: | I suggest you take a look at sys-apps/buffer!!!
| Code: | * sys-apps/buffer
Latest version available: 1.19-r1
Latest version installed: [ Not Installed ]
Size of downloaded files: 34 kB
Homepage: http://www.microwerks.net/~hugo/download.html
Description: a tapedrive tool for speeding up reading from and writing to tape
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Here's an example:
| Code: | root@laureate:~# buffer -i /dev/video1 -o ee.xx -z 32k
8096K
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Home Page:
http://www.microwerks.net/~hugo/download.html
More Info:
http://www.geocrawler.com/archives/3/163/2001/9/0/6714478/ |
I'll check out this utility, to see if it applies to more than non-tape drives, however, I'm still a bit put off by DMA failing misearably. The drive is new, bought yesterday, so I doubt it would simply not support DMA...
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dma
Guru
Joined: 31 Jan 2003
Posts: 437
Location: Charlotte, NC, USA
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| Posted: Sat May 03, 2003 5:24 am Post subject: |
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I was using it on raw webcam data above. 
Try this one:
| Code: | root@laureate:~# buffer -i /dev/zero -o /dev/null -z 32k
1014144K
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