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Taiidan@×××.com wrote: |
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> Here are some theories. |
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> |
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> * You gotta properly align the sectors for 4K advanced format |
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> * USB doesn't have NCQ which really slows things down. |
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> * Copying many small files is almost always slow since they are located |
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> on various parts of the drive not in a contiguous block (again see NCQ) |
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> * System is set to use IDE not AHCI thus no NCQ etc |
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> * You are using a secondary SATA chip such as the terrible ones from |
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> JMicron or what not instead of what is on your systems northbridge or a |
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> quality PCI-e HBA. |
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> |
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> |
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Googled to see how to find out if it is aligned correctly and found this. |
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root@fireball / # cat /sys/block/sdb/queue/physical_block_size |
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4096 |
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root@fireball / # |
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I thought cgdisk did that automatically so I guess it did. Drive is |
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currently connected to my motherboard's Sata port. If it was a |
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bad/cheap controller, I'd think the other drives would also give slow |
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speeds. They work fine. While I have a Sata PCI-e card installed, I'm |
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not using it yet. It has a Marvel chipset which others say works fine. |
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Once I get some more power cables in, I'll test it to see how it does. |
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At this point tho, all drives are connected to the Gigabyte Sata ports. |
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Sorry if that caused confusion. |
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It seems we can eliminate some possible problems at least. I need more |
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ideas to check on it seems. Still, I may dd the thing, at least the |
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first bit of it anyway, and start again. I did repartition and format |
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the drive after the move tho. Still, maybe dd-ing it for a fresh start |
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will help. At this point, I don't need the data on it. I can redo |
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whatever until I get it working correctly. |
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Thanks for the ideas. |
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|
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Dale |
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:-) :-) |
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