Messages in this thread | | | Date | Sun, 15 May 2005 22:11:54 -0400 | From | Jeff Garzik <> | Subject | Re: Disk write cache (Was: Hyper-Threading Vulnerability) |
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Gene Heskett wrote: > I don't think I have any drives here that do obey that, Jeff. I got > curious about this, oh, maybe a year back when this discussion first > took place on another list, and wrote a test gizmo that copied a > large file, then slept for 1 second and issued a sync command. No > drive led activity until the usual 5 second delay of the filesystem > had expired. To me, that indicated that the sync command was being > returned as completed without error and I had my shell prompt back > long before the drives leds came on. Admittedly that may not be a > 100% valid test, but I really did expect to see the leds come on as > the sync command was executed.
> Again, probably not a valid test of the sync command, but thats the > evidence I have. I do not believe it works here, with any of the 5 > drives currently spinning in these two boxes.
Correct, that's a pretty poor test.
Jeff
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