Time: Mon Jun 02 21:20:42 1997 by primenet.com (8.8.5/8.8.5) with ESMTP id VAA15191; Mon, 2 Jun 1997 21:20:34 -0700 (MST) id AAA25015; Tue, 3 Jun 1997 00:11:09 -0400 (EDT) id AAA24999; Tue, 3 Jun 1997 00:10:55 -0400 (EDT) id AA21808; Tue, 3 Jun 1997 00:10:51 -0400 by usr01.primenet.com (8.8.5/8.8.5) with ESMTP id VAA27383; Mon, 2 Jun 1997 21:09:47 -0700 (MST) by primenet.com (8.8.5/8.8.5) with SMTP id VAA05842; Mon, 2 Jun 1997 21:12:48 -0700 (MST) Date: Tue, 03 Jun 1997 04:11:37 -0700 To: (Recipient list suppressed) From: Paul Andrew Mitchell [address in tool bar] Subject: SNET: SLF: FAT16 problem: demonstration and proof -> SearchNet's SNETNEWS Mailing List Dear Friends, Several people have asked me for a safe method of demonstrating the problem with FAT16 partitions. I happened to stumble upon the perfect test, when I was doing general maintenance last weekend. I was deleting unwanted files in the CACHE directory utilized by NETSCAPE to store web files which are downloaded from the Internet. I did a DOS DIR command, both before and after deleting all those files. The DIR command shows the sum of the individual file sizes, in bytes, and also the amount of space available within that partition. The discrepancy between the sum, and the difference between space available before the deletion, and space available after the deletion, tells the story. Here's a sequence which will work on your system: 1. find the DOS directory where your web browser caches files which are downloaded 2. copy these into a temporary directory which you will delete later, when you are all done with this experiment 3. do a DOS DIR command first, and note the summary results below the last filename 4. delete all of these files with the DOS ERASE command 5. then, do another DOS DIR command, and again note the summary results below the last filename 6. be sure to write down the results, so you can do a little arithmetic 7. compute the total overhead, as shown in the following example: [This text is formatted in Courier 11, non-proportional spacing.] C:\MYDIR>cd \temp C:\TEMP> mkdir test.dir C:\TEMP> cd test.dir C:\TEMP\TEST.DIR> copy c:\windows\primenet\netscape\cache\*.* /v C:\TEMP\TEST.DIR> dir Volume in drive C is primary486 Volume Serial Number is C729-1F9C Directory of C:\TEMP\TEST.DIR . <DIR> 11-23-96 6:21p .. <DIR> 11-23-96 6:21p FAT DB 98,304 06-03-97 3:03a M0PP3BTC 3,506 06-01-97 10:21a M0PP3BTH GIF 54 06-01-97 10:21a M0PP3C1H 6,929 06-01-97 10:24a M0PP3C1J GIF 5,188 06-01-97 10:24a M0PP7QHG DAT 43 06-03-97 2:55a M0PP3BTU 34,824 06-01-97 10:22a M0PP3BU0 GIF 4,519 06-01-97 10:22a M0PP3BU1 GIF 4,542 06-01-97 10:22a M0PP3BU2 GIF 351 06-01-97 10:22a M0PP3BU6 GIF 1,439 06-01-97 10:22a M0PP3BU8 GIF 895 06-01-97 10:22a M0PP3BU9 GIF 151 06-01-97 10:22a M0PP3BUA GIF 1,341 06-01-97 10:22a M0PP3BUC GIF 1,734 06-01-97 10:22a M0PP3BUD GIF 3,178 06-01-97 10:22a M0PP3BUE GIF 2,732 06-01-97 10:22a M0PP3BUF GIF 3,013 06-01-97 10:22a M0PP3BUG GIF 1,754 06-01-97 10:22a M0PP3BUH GIF 259 06-01-97 10:22a M0PP3BUI GIF 25,434 06-01-97 10:22a M0PP3BUJ GIF 890 06-01-97 10:22a M0PP3BUK GIF 7,267 06-01-97 10:22a M0PP3BUP GIF 4,162 06-01-97 10:22a M0PP3BUQ GIF 1,470 06-01-97 10:22a M0PP3BUU 7,546 06-01-97 10:22a M0PP3BVR HTM 8,494 06-01-97 10:23a M0PP3BVT GIF 268 06-01-97 10:23a M0PP3BVU GIF 205 06-01-97 10:23a M0PP3BVV GIF 1,636 06-01-97 10:23a M0PP3C00 GIF 270 06-01-97 10:23a M0PP7QHS 1,553 06-03-97 2:56a M0PP7QHT GIF 148 06-03-97 2:56a M0PP3C1K GIF 1,402 06-01-97 10:24a M0PP3C1L GIF 638 06-01-97 10:24a M0PP3C1M GIF 1,698 06-01-97 10:24a M0PP3C1N GIF 2,042 06-01-97 10:24a M0PP3C1O 382 06-01-97 10:24a M0PP3C1P GIF 14,618 06-01-97 10:24a M0PP3C1Q GIF 855 06-01-97 10:24a M0PP3C34 HTM 16,975 06-01-97 10:24a M0PP3C35 GIF 1,523 06-01-97 10:24a M0PP3C3V HTM 9,971 06-01-97 10:25a M0PP3C40 GIF 1,035 06-01-97 10:25a M0PP3C68 HTM 30,615 06-01-97 10:26a M0PP3C94 4,563 06-01-97 10:28a M0PP3C95 GIF 3,027 06-01-97 10:28a M0PP3C96 GIF 679 06-01-97 10:28a M0PP3C97 GIF 8,779 06-01-97 10:28a M0PP3C98 GIF 742 06-01-97 10:28a M0PP3C9A GIF 1,614 06-01-97 10:28a M0PP3C9B GIF 923 06-01-97 10:28a M0PP3C9C GIF 1,057 06-01-97 10:28a M0PP3C9D GIF 574 06-01-97 10:28a M0PP3C9E GIF 923 06-01-97 10:28a M0PP3C9F GIF 1,169 06-01-97 10:28a M0PP3C9G GIF 1,006 06-01-97 10:28a M0PP3C9H GIF 1,037 06-01-97 10:28a M0PP3C9I GIF 1,868 06-01-97 10:28a M0PP3C9J GIF 1,018 06-01-97 10:28a M0PP3C9K GIF 1,009 06-01-97 10:28a M0PP3C9L GIF 1,026 06-01-97 10:28a M0PP3C9M GIF 991 06-01-97 10:28a M0PP3C9N GIF 1,063 06-01-97 10:28a M0PP3C9O GIF 1,543 06-01-97 10:28a M0PP3C9P GIF 1,186 06-01-97 10:28a M0PP3C9Q GIF 4,568 06-01-97 10:28a M0PP3C9R GIF 586 06-01-97 10:28a M0PP3C9S GIF 6,266 06-01-97 10:28a M0PP3C9T GIF 1,282 06-01-97 10:28a M0PP3C9U GIF 78 06-01-97 10:28a M0PP3C9V GIF 1,336 06-01-97 10:28a M0PP3CA0 GIF 1,134 06-01-97 10:28a M0PP3CA1 GIF 1,250 06-01-97 10:28a M0PP3CA2 GIF 1,233 06-01-97 10:28a M0PP3CBC HTM 6,252 06-01-97 10:29a M0PP3CBE 385 06-01-97 10:29a M0PP3CBI HTM 49,844 06-01-97 10:29a M0PP3CBK GIF 4,739 06-01-97 10:29a M0PP3CBM GIF 1,063 06-01-97 10:29a M0PP3CBN GIF 1,031 06-01-97 10:29a M0PP3CBO GIF 300 06-01-97 10:29a M0PP3CBP GIF 285 06-01-97 10:29a M0PP3CBQ GIF 1,048 06-01-97 10:29a M0PP3CBR GIF 266 06-01-97 10:29a M0PP3CBS GIF 2,216 06-01-97 10:29a M0PP3CBT GIF 972 06-01-97 10:29a M0PP3CBU GIF 241 06-01-97 10:29a M0PP3CBV GIF 879 06-01-97 10:29a M0PP3CC0 GIF 1,098 06-01-97 10:29a M0PP3CC1 GIF 2,000 06-01-97 10:29a M0PP3CC2 GIF 1,116 06-01-97 10:29a M0PP3CC3 GIF 441 06-01-97 10:29a M0PP3CC4 GIF 1,085 06-01-97 10:29a M0PP3CC5 GIF 1,037 06-01-97 10:29a M0PP3CC6 GIF 293 06-01-97 10:29a M0PP3CC7 GIF 1,052 06-01-97 10:29a M0PP3CC8 GIF 1,054 06-01-97 10:29a M0PP3CC9 GIF 287 06-01-97 10:29a M0PP3CCA GIF 304 06-01-97 10:29a M0PP3CCB GIF 1,043 06-01-97 10:29a M0PP3CCC GIF 970 06-01-97 10:29a M0PP3CCD GIF 1,119 06-01-97 10:29a M0PP3CCE GIF 645 06-01-97 10:29a M0PP3CCF GIF 18,018 06-01-97 10:29a M0PP3CCG GIF 626 06-01-97 10:29a M0PP3CCH GIF 304 06-01-97 10:29a M0PP3CCI GIF 298 06-01-97 10:29a M0PP3CCJ GIF 275 06-01-97 10:29a M0PP3CCK 419 06-01-97 10:29a M0PP3CER 1,539 06-01-97 10:31a M0PP3CES GIF 4,392 06-01-97 10:31a M0PP3CET GIF 14,520 06-01-97 10:31a M0PP3CEU GIF 1,166 06-01-97 10:31a M0PP3CFA HTM 1,554 06-01-97 10:31a M0PP3CFB GIF 1,924 06-01-97 10:31a M0PP3CGM HTM 34,854 06-01-97 10:32a M0PP7QHE GIF 49,932 06-03-97 2:56a M0PP7QHF GIF 33,870 06-03-97 2:56a M0PP7QHU GIF 216 06-03-97 2:56a M0PP7QHV GIF 229 06-03-97 2:56a M0PP7QI4 HTM 11,812 06-03-97 2:56a M0PP7QIE HTM 25,421 06-03-97 2:56a M0PP7QKT HTM 29,108 06-03-97 2:57a M0PP7QLP HTM 18,868 06-03-97 2:58a M0PP7QLR GIF 567 06-03-97 2:58a M0PP7QLS GIF 38 06-03-97 2:58a M0PP7QLT GIF 63 06-03-97 2:58a M0PP7QLU GIF 47 06-03-97 2:58a M0PP7QLV GIF 43 06-03-97 2:58a M0PP7QM0 GIF 40 06-03-97 2:58a M0PP7QM1 GIF 53 06-03-97 2:58a M0PP7QM2 GIF 1,485 06-03-97 2:58a M0PP7QNS HTM 7,698 06-03-97 2:59a M0PP7QS1 9,660 06-03-97 3:01a M0PP7QS3 JPG 1,472 06-03-97 3:01a M0PP7QS4 GIF 1,182 06-03-97 3:01a M0PP7QS5 GIF 1,041 06-03-97 3:01a M0PP7QS6 GIF 1,050 06-03-97 3:01a M0PP7QS7 GIF 1,107 06-03-97 3:01a M0PP7QS8 JPG 7,884 06-03-97 3:01a M0PP7QSL HTM 13,860 06-03-97 3:02a M0PP7QSP GIF 1,043 06-03-97 3:02a M0PP7QSQ GIF 1,076 06-03-97 3:02a 146 file(s) 751,202 bytes 239,140,864 bytes free C:\TEMP\TEST.DIR>erase *.* All files in directory will be deleted! Are you sure (Y/N)?y C:\TEMP\TEST.DIR> dir Volume in drive C is primary486 Volume Serial Number is C729-1F9C Directory of C:\TEMP\TEST.DIR . <DIR> 11-23-96 6:21p .. <DIR> 11-23-96 6:21p 2 file(s) 0 bytes 244,088,832 bytes free Now, do the arithmetic: free bytes AFTER deletion: 244,088,832 free bytes BEFORE deletion: -239,140,864 ------------ difference: 4,947,968 bytes used BEFORE deletion: -751,202 (see DIR output) ------------ difference: 4,196,766 / # files: / 146 ------------ TOTAL WASTED SPACE, FAT16: 28,745 bytes per file ============ So, if you have 1,000 files with FAT16, you are wasting 1,000 x 28,745 = 28.7 MB! Your numbers may vary; the average will be closer to a mean waste per file of 32K (0.50 x 64K). /s/ Paul Mitchell http://www.supremelaw.com ======================================================================== Paul Andrew, Mitchell, B.A., M.S. : Counselor at Law, federal witness email: [address in tool bar] : Eudora Pro 3.0.2 on Intel 586 CPU web site: http://www.supremelaw.com : library & law school registration ship to: c/o 2509 N. Campbell, #1776 : this is free speech, at its best Tucson, Arizona state : state zone, not the federal zone Postal Zone 85719/tdc : USPS delays first class w/o this ======================================================================== -> Send "subscribe snetnews " to majordomo@world.std.com -> Posted by: Paul Andrew Mitchell [address in tool bar]
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