1 Topic by whipartist

  • whipartist
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Topic: What sort of throughput should I expect?

I'm replacing my main system drive (500GB) with a new one (1TB).  In order to do this, I've partitioned the new drive and I'm now copying data from one disk to the other.  I think I am, at least.  It's been going for a few hours now, and I'm still seeing the Knight Rider back-and-forth while copying the first of two partitions from the old drive.  The first partition is on the order of 130GB, and the other is the rest of a 500GB drive.

Both drives are SATA/150.  Actually, the new one is SATA/300, but the motherboard is only 150.

Certainly the theoretical throughput should have this done a while ago.  What should I expect to see in practice?  Or the real question... how long should I let it run before I conclude that something is hosed?

2 Reply by class413

  • class413
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Re: What sort of throughput should I expect?

In theory sata could carry 1.5 Gbit/s (about 188 MiB/s). In practice, it is much lower that that. It seems that 80 MiB/s is a good value for fast systems. However I remember cases as low as 10 MiB/s, due to driver. firmware, motherboard chipset or BIOS problems.

*** It is highly recommended to backup any important files before doing resize/move operations. ***