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Re: [OM] File losses

Subject: Re: [OM] File losses
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Wed, 25 Mar 2015 09:07:13 -0400
I don't understand the slowness. I normally backup using USB3 these days but when I first installed it I compared it to eSATA. USB3 was faster but not by a great deal... in particular, I suppose, because my SATA drives are old... cetainly not SATA 3 and maybe not even SATA 2.

The only time I copy an entire drive is when I create a clone of my C drive. My C drive has 160 GB of actual data and gets cloned in, I'd say about 2-3 hours. I'm not real sure about that since I normally start it at night and let it go.

At 3 hours that's only about 15MB/sec. Even SATA 1 can do burst transfers at 10 times that speed. I don't know what the average transfer rate is (counting rotation and head motion delays) but 15MB/sec counting the interaction of both the read and write drives seems reasonable to me.

3 days and nights on even an ancient XP machine sounds like something is terribly wrong... like maybe some drive is spending most of its time on error recovery.

I think I'd stop what it's doing and just try to format the entire new drive using a full format. That will give you an idea of what the computer and that drive together can do as to data rate. It will also answer whether the new drive might be defective. Writing the full 1TB will take a long time but I think I'd take the time to check it.

Chuck Norcutt


On 3/25/2015 4:42 AM, bj@xxxxxxxxxxxxxx wrote:
Update,

I now have a 1TB drive sitting in a "toaster"connected to the computer by an
eSATA cable, and am doing a total backup using NovaBACKUP professional
for which I even paid.

But it is SLOW; when first it started it looked as though it would be all done 
in
just a few hours.
Now the forecast is that the total time will be about 3 days and nights.

Finding the tools to format this new drive in XP was a mission; the tools are
very well hidden; I had to get help - not available from Microsoft of course
since they no longer support XP.

Brian

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