I hit (what I think was) this problem with a fresh install of Hardy
AMD64. My SATA controller is:
00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller (rev a3)
(prog-if 85 [Master SecO PriO])
Subsystem: Hewlett-Packard Company Unknown device 1714
I found that only my *second* hard drive (sdb) was slow, and only for
writes. It turned out that the sata_nv driver, for whatever reason, did
not enable the write cache on the second hard disk. 'hdparm -W 1
/dev/sdb' fixed the slow speed problems for me. Maybe that will help
others on here?
It's not clear why the write cache doesn't get enabled on the second
drive...
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Slow SATA performance
https://bugs.launchpad.net/bugs/119730
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