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#299199 - 11/06/2007 16:16 how fast do drives copy to each other in the player?
bodybag
addict

Registered: 07/03/2002
Posts: 504
Loc: Southern California
I've got about 160gb of music on my main Empeg and I want to create another "clone" player with all the same playlists and music.

My original plan was to FTP the FID's to my PC and then FTP them back to the "clone" player. Obviously this will take a long, long, long time (I get about 2gb per hour normally via FTP).

Which brings me to my question: How much faster would it be to open the player and copy the drives one at a time using the player to do the copy?
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Bodybag - So Cal
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#299200 - 11/06/2007 16:22 Re: how fast do drives copy to each other in the player? [Re: bodybag]
tfabris
carpal tunnel

Registered: 20/12/1999
Posts: 31594
Loc: Seattle, WA
Faster than FTP, but not lightning fast. It will still take hours.

If you want to do that, there are detailed instructions in the Drive Upgrade Guide on exactly how to do it. You should follow those instructions carefully to make sure you do the steps right. Pretend that the existing empeg is the "old drive" and the new clone empeg is the "new drive", and follow the instructions to the letter.
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Tony Fabris

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#299201 - 11/06/2007 16:43 Re: how fast do drives copy to each other in the player? [Re: tfabris]
bodybag
addict

Registered: 07/03/2002
Posts: 504
Loc: Southern California
Quote:
Faster than FTP, but not lightning fast. It will still take hours.



Hours, I can live with hours... I was worried about DAYS!!!
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Bodybag - So Cal
Not a Whiner any more!!!

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#299202 - 11/06/2007 17:08 Re: how fast do drives copy to each other in the player? [Re: bodybag]
tfabris
carpal tunnel

Registered: 20/12/1999
Posts: 31594
Loc: Seattle, WA
I dunno, for 160gb drives, it still might come out to days. I don't have numbers. Anyone have numbers?
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Tony Fabris

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#299203 - 11/06/2007 18:36 Re: how fast do drives copy to each other in the player? [Re: tfabris]
drakino
carpal tunnel

Registered: 08/06/1999
Posts: 7868
Maximum best the ISA connected IDE controller could do would be 16MB/s. Halving that to account for both drives on the same bus, and overhead, and you are probably looking at 5MB/s at best. So a minimum of 9 hours for 160 gigs.

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#299204 - 11/06/2007 20:16 Re: how fast do drives copy to each other in the player? [Re: drakino]
bodybag
addict

Registered: 07/03/2002
Posts: 504
Loc: Southern California
Best of 9hrs compared to my estimated best of 6 days, I'm going to give this a shot.
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Bodybag - So Cal
Not a Whiner any more!!!

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#299205 - 11/06/2007 21:01 Re: how fast do drives copy to each other in the player? [Re: bodybag]
mlord
carpal tunnel

Registered: 29/08/2000
Posts: 14491
Loc: Canada
If you want to truly clone a player onto an identical sized hard disk, then do it inside the player, with this one simple command: cat /dev/hda > /dev/hdb
where hda is the current working empeg install, and hdb is the temporary slave drive that you want to turn into a clone.

Cheers

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#299206 - 12/06/2007 06:35 Re: how fast do drives copy to each other in the player? [Re: drakino]
peter
carpal tunnel

Registered: 13/07/2000
Posts: 4180
Loc: Cambridge, England
Quote:
Maximum best the ISA connected IDE controller could do would be 16MB/s. Halving that to account for both drives on the same bus, and overhead, and you are probably looking at 5MB/s at best. So a minimum of 9 hours for 160 gigs.

IIRC we don't achieve anything like that. Memory-to-disk bandwidth is 4MB/s, half that is 2MB/s, which is only 2.5 times faster than doing it over Ethernet. 160GB would be 80,000 seconds or about a day.

You can do a lot better with a USB-to-IDE doobrie and doing the copy via a Linux PC. Those probably hit 20MB/s unless your drives are really old.

Peter

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#299207 - 12/06/2007 07:33 Re: how fast do drives copy to each other in the player? [Re: mlord]
Roger
carpal tunnel

Registered: 18/01/2000
Posts: 5683
Loc: London, UK
Quote:
If you want to truly clone a player onto an identical sized hard disk


The important part in Mark's reply there is the identical sized. Don't do this if the destination disk is smaller than the source (it won't fit) or radically bigger (you'll waste the extra space).

If, on the other hand, the disks are identical in size, then go for it. It has the advantage that you'll copy all of your dynamic data (EQ settings, tuner settings, play counts, etc.)
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