Date: Tue, 11 Apr 2000 14:01:42 -0700 From: Scott Hess <scott@avantgo.com> To: Augusto Bott <augusto.bott@zipmail.com.br> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: JFS, tcp ports, file systems... Message-ID: <20000411140142.A4731@avantgo.com> In-Reply-To: <20000411193318.1AFB1BC66@zipmx11.zipmail.com.br> References: <20000411193318.1AFB1BC66@zipmx11.zipmail.com.br>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Apr 11, 2000 at 04:33:18PM -0300, Augusto Bott wrote: > 2 - I'm tweaking a portscanner, what's the highest port number > which a daemon/program/computer cas listen/send info? Ports are 16-bit unsigned integers. > 3 - On Hard disks, the Zero (0) track is in the center(or not)? Read > from the inner cylinders is faster than the outter cyl's? Usually on the outside. Data is recorded at a more-or-less constant density, while the disk spins at a constant RPM, so you can read data faster from the outer tracks than the inner tracks. Putting the 0 sector on the outside thus makes DOS and Windows (and anything else using FAT) seem faster. > 4 - For FFS/UFS, this is the place where the root dir's are written > (in the beggining of the partition/slice? If not, where is this > information written ? > (I 've heard that on OS/2 the root of any filesystem is in the > middle of the partition, thus lowering seek times...) I'm not sure it makes a difference - after the first filesystem access, the root directory will be in cache, and since it's the root, it will likely never leave the cache. Maybe OS/2 stores all directory info in the center of the partition? FFS distributes files (and directories are files) all over the place. Later, scott To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20000411140142.A4731>