[lkml]   [1998]   [Dec]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Unswappable memory needed is user space

"Richard B. Johnson" <> writes:
> As the disk-drive warms up, it's geometry changes. Data that was
> written when the drive was cold will be on some place on a track,
> maybe on the center, maybe on an edge. When the drive is at its
> final temperature, new data will be written in a slightly different
> place on the track.

They (also) use the fact that data which has been on the disk for a while
"prints through" deeper into the magnetic oxide covering. Apparently you
can quite literally shave off the top of the oxide and read older data

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:46    [W:0.053 / U:6.404 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site