On Mon, Feb 28, 2011 at 04:10:44PM -0500, Jeff Moyer wrote: > > So it there a reliable way to detect that disk drives that don't have > > the Read-Modify-Write logic? If that can be reflected up the I/O > > layer I can have mke2fs enforce that restriction, which currently we > > only enforce if the logical blocksize is 4k. > > That's not enough, I'm afraid. How do you deal with O_DIRECT, for > example? The drives do the read/modify/write, so O_DIRECT works fine from the OS's perspective. There is some risk of torn pages if you get a crash at the wrong moment, but that's true whenver you have a misaligned partition. (At least for the drives that do the RMW in the disk firmware.) - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
