On Sun, Apr 11 at 22:45, James Van Artsdalen wrote:
PS. It is faster for an SSD to write a block of 0xFF than 0 and it's possible some might make that optimization. That's why I suggest erase-to-ones rather than erase-to-zero.
Do you have any data to back this up? While I understand the underlying hardware implementation of NAND, I am not sure SSDs would bother optimizing for this case. A block erase would be just as effective at hiding data. I believe the reason strings of bits "leak" on rotating drives you've overwritten (other than grown defects) is because of minute off-track occurances while writing (vibration, particles, etc.), causing off-center writes that can be recovered in the future with the right equipment. Flash doesn't have this "analog positioning" problem. While each electron well is effectively analog, there's no "best guess" work at locating the wells. -- Eric D. Mudama edmud...@mail.bounceswoosh.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
