Slow partition copy in DD 10 at bootup

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Following the suggestions of others I used DD 10 to copy my main Windows Vista C: drive partition to a backup ESata drive at bootup time from the DD 10 entry of the OS Selector menu. The drive is about 240 GB. My Sata and ESata drives are all Sata 3.0. My memory is 8 GB. My processor is an AMD Phenom 9950.

The total time for copying this drive was 21 hours !

OK, I have other computers on the network which I could use while the copying took place, and the copying was successful when it was finished.

But why should it take 21 hours of processing time on a pretty fast system, with much memory, to successfully copy this partition to a backup ESata drive ?

Tue, 03/23/2010 - 01:22
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Edward:

Yeah, that's pretty atrocious. It's an indicator that the DD 10 boot CD doesn't have the correct drivers for one or both of your disks. When working properly you should get copy rates of at least 1 GB/min.

There's an ISO of the DD 10 boot environment that you can download from your account page on the Acronis web site. It is based on ISOLINUX and has more drivers than the original DD 10 boot CD. You could try that but the fastest transfer rates are available from the Windows version of the program using Windows drivers. Some have reported eSATA rates of up to 3 GB/min in Windows.

Tue, 03/23/2010 - 03:03
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truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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Edward,

The speed problem (or lack of speed) was because you started DD from OSS. That version of DD is always the Safe Mode version (DOS-based) and accesses the drives through the BIOS. Depending on the drives and the BIOS support, it can be considerably slower than the Full Mode (Linux-based) version available on the DD CD.

Tue, 03/23/2010 - 04:56
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MudCrab wrote:
Edward,

The speed problem (or lack of speed) was because you started DD from OSS. That version of DD is always the Safe Mode version (DOS-based) and accesses the drives through the BIOS. Depending on the drives and the BIOS support, it can be considerably slower than the Full Mode (Linux-based) version available on the DD CD.

By DD CD you mean the recovery CD which I created ?

I will use the recovery CD from now on for DD actions which I can not do from Windows because my partition must be locked.

Tue, 03/23/2010 - 11:56
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Yes. The DD CD is the CD you create using Media Builder or the CD you create from the ISO file you can download from your Acronis account.

Note that when large amounts of data don't need to be moved, using the Safe Mode version can be faster because it usually loads much more quickly than the Full Mode version. Also, accessing DD directly from OSS is quick and easy (no need to bother with a CD).

Tue, 03/23/2010 - 16:35
truwrikodrorowrelupicugojestutroclulachosaswunuhospikigawakijosaswenomaruclojeueclikaspedrubewidebrisubrohutrurifruuagothunugekedrumucisiuobrobrecrupeslapuswosluprothethibakaslechurathikucli
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MudCrab wrote:
Yes. The DD CD is the CD you create using Media Builder or the CD you create from the ISO file you can download from your Acronis account.

Note that when large amounts of data don't need to be moved, using the Safe Mode version can be faster because it usually loads much more quickly than the Full Mode version. Also, accessing DD directly from OSS is quick and easy (no need to bother with a CD).

The fact that using DD from OSS is quick and easy was the reason I used it. But if it is so much slower than the DD on the rescue disk, clearly it is a poor choice for any large-scale backup that can not be done from within DD under Windows.

Tue, 03/23/2010 - 16:53