Messages in this thread | | | From | Kyle Moffett <> | Subject | Re: Disk write cache | Date | Sun, 15 May 2005 12:50:22 -0400 |
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On May 15, 2005, at 12:43:07, Jeff Garzik wrote: > The only way to you can be assured that your data has "hit the > platter" is > (1) issuing [FLUSH|SYNC] CACHE, or > (2) using FUA-style disk commands
And even then, some battery-backed RAID controllers will completely ignore cache-flushes, because in the event of a power failure they can maintain the cached data for anywhere from a couple days to a month or two, depending on the quality of the card and the size of its battery.
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