Date: Fri, 25 Aug 2000 02:10:04 -0700 (PDT) From: John Baldwin <jhb@pike.osd.bsdi.com> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/20633: fdisk doesn't handle LBA correctly Message-ID: <200008250910.CAA31143@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR bin/20633; it has been noted by GNATS. From: John Baldwin <jhb@pike.osd.bsdi.com> To: freebsd-gnats-submit@FreeBSD.org, sjr@home.com Cc: Subject: Re: bin/20633: fdisk doesn't handle LBA correctly Date: Fri, 25 Aug 2000 02:05:42 -0700 (PDT) Your analysis is not quite correct. The problem is that the MBR format cannot indicate a cylinder higher than 1023 because there simply aren't enough bits. Therefore, when a geometry specification goes beyond the 1023rd cylinder, a special value of '0xffffff' is used in the partition table entry, which indicates that the starting LBA and size items must be used for a given entry. This special value translates into the values you see in your fdisk output. -- John Baldwin <jhb@bsdi.com> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.cslab.vt.edu/~jobaldwi/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200008250910.CAA31143>