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Disc cloning takes a day

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This issue maybe asked somewhere else, however I am using two identical model disk for the cloning process. The Disk are also the same size as well, one being used as a primary and another as backup. Both drives are SAS-2 as my computer uses SAS-2 interface along side with SATA interfaces. They are also 4TB in size at 7200RPM.

Is this normal for Acronis True Image 2017 to take a day to clone nearly 2TB of data?

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The time does seem excessive. I do not recall anyone asking about use of Acronis 2017 with SAS drive.

If you are going to clone, it should be done using the recovery media, not from using Windows ATI Application. Too many things can go wrong. In many ways it is best to create a backup of the souce drive and then recovere to the target drive. You then have a backup in case something goes wrong.

One possibility is that you are doing a secter by sector clone; this can happen "automatically" if ATI thinks there is a problem with the source HDD. You shoudl scan the source HDD for errors - chkdsk is the easiest thing to try.

It may help if you create a custom recover media that includes the latest driver for the SAS controller. The drivers in the recover media may be causing performance issues with the SAS controller.

Before proceeding I would wait for other suggestions as there are some very clever people frequenting this Forum - people who definitely are likely to have a better understanding of the possible cause of the problem.

Ian

SAS drives are not speed demons as single drives.  Most sport a high rotational speed of 10k to 15k but that only effects access time which has minmal effect on data transfer rates.

I believe an SAS2 drive has a maximum sustained transfer rate of 200MBs.  That figure though is dependent on the siae of data file being transfered and the total amount of data.  Small file sizes say 4k to 8k throughput is much lower than that of larger file size say 64k up. 

I would say a day to handle 2TB of data between 2 such drives would be an expected result.

Yeah, this makes sense, although SAS-2 are 6Gpbs so my calculation would be 750MBs. However at best I mostly get 150 to 200MBs throughputs. On accaision maybe 1 Gpbs especially for larger files. I think it's slow due to the rotaitional speed that I mentioned on the first post.

Thanks that's all I wanted to know.