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Painfully slow backup
Hello,
I'm trying to use SuperDuper! to backup to a USB2 drive from my MacBook Pro. When doing a full backup to the drive (not to an image) SD! reports a copy speed of around 0.5MB/s. I've let it run for quite some time and the speed does not improve. To rule out the speed of the USB disk I tried using Finder to copy some files. Finder copies 4GB in around a minute (giving a speed of about 53MB/s). Is there some reason SD! would run so much slower? Is there anything I can do to speed this process up? Thanks, Chap |
#2
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Sounds like the drive really isn't running HiSpeed, Chap. Is that the only thing attached to USB?
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--Dave Nanian |
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Quote:
I searched the forums for similar posts to try to narrow the problem down further. I was running an erase and copy to the drive itself, not an image, so comparison and compression time should not be an issue. I also closed all programs other than SD!. I appreciate any help you can provide. Thanks, Chap |
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We're using standard calls to write to the drive; they go as fast as they can. If you're getting super slow speeds, it's because something is causing that -- although it's hard to judge Finder vs. a SD copy because the SD! copy is going to start out copying a zillion teeny files, and you likely streamed something large...
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--Dave Nanian |
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I'm having the same problem. I'm using one of the Lacie USB2 drives (the FA Porsche designed model) and am currently only getting a copy speed of around 2 MB/s..... I'm also using a macbook pro, and I'm sure that the drive is hispeed because in the system profiler it is listed as: Speed: Up to 480 Mb/sec What could be causing this issue? Thanks. Patso |
#6
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Slow speeds are caused because either the source or destination drives aren't running quickly (for whatever reason), or because of software interference (e.g. AntiVirus).
__________________
--Dave Nanian |
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