In message <[EMAIL PROTECTED]>, Bruce M Simpson writes: >Ah, let me rephrase, I meant: > >* NAND Flash embedded ATA controllers should not erase sectors >containing data unless absolutely necessary, to implement wear levelling.
That's part of the job description, but it is more complex than that. > * BIO_DELETE provides the necessary hint from the OS, by way of the ATA >CFA ERASE command, to tell the flash controller that the upper layer >consumer of the blocks has marked the data as being erased. Yes. > * The NAND flash ATA controller is *then* in a position to know how >best to implement that wear levelling as the OS has told it "I'm not >using these sectors any more". Possibly. For "best" substitute "better" and I might agree. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ cvs-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
