Messages in this thread | | | Subject | Re: [Patch] document ext3 requirements (was Re: [RFD] Incremental fsck) | From | Bryan Henderson <> | Date | Thu, 17 Jan 2008 13:37:04 -0800 |
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"Daniel Phillips" <phillips@google.com> wrote on 01/16/2008 06:02:50 PM:
> On Jan 16, 2008 2:06 PM, Bryan Henderson <hbryan@us.ibm.com> wrote: > > >The "disk motor as a generator" tale may not be purely folklore. When > > >an IDE drive is not in writeback mode, something special needs to done > > >to ensure the last write to media is not a scribble. > > > > No it doesn't. The last write _is_ a scribble. > > Have you observed that in the wild? A former engineer of a disk drive > company suggests to me that the capacitors on the board provide enough > power to complete the last sector, even to park the head.
No, I haven't. It's hearsay, and from about 3 years ago.
As for parking the head, that's hard to believe, since it's so easy and more reliable to use a spring and an electromagnet.
-- Bryan Henderson IBM Almaden Research Center San Jose CA Filesystems
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