Re: "Flushing" a rename?
Re: "Flushing" a rename?
- Subject: Re: "Flushing" a rename?
- From: James Bucanek <email@hidden>
- Date: Tue, 13 May 2008 18:01:57 -0700
Jens Alfke <mailto:email@hidden> wrote (Tuesday, May 13,
2008 4:30 PM -0700):
The disk controller has a several-megabyte internal buffer, and when
it's told to write sectors, they end up in the buffer for a little
while before they get written, so that the drive can optimize its seek
pattern. During that little while, if the kernel panics, or the system
loses power, or the USB/FireWire cable is yanked, those sector-level
writes are lost.
That's interesting. Since the drive's controller is essentially
independent of the main CPU/motherboard, I've always assumed
that data that has been successfully transferred to the drive
would eventually get written (assuming power, of course) --
regardless of what happens to the system.
--
James Bucanek
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