From: badger <1516@box.ukf.net>
Date: Thu, 8 Mar 2007 02:05:21 -0000
File CRC check file par2 (does a similar job to MD5)
http://www.pricelesswarehome.org/ftp/Archives/2007PL-ISO/PAR2/PL2007CD.iso.par2
These are the recovery block volumes - only some will normally need to be downloaded as per David's notes below.
http://www.pricelesswarehome.org/ftp/Archives/2007PL-ISO/PAR2/PL2007CD.iso.vol000+01.PAR2
http://www.pricelesswarehome.org/ftp/Archives/2007PL-ISO/PAR2/PL2007CD.iso.vol001+02.PAR2
http://www.pricelesswarehome.org/ftp/Archives/2007PL-ISO/PAR2/PL2007CD.iso.vol003+04.PAR2
http://www.pricelesswarehome.org/ftp/Archives/2007PL-ISO/PAR2/PL2007CD.iso.vol007+07.PAR2
http://www.pricelesswarehome.org/ftp/Archives/2007PL-ISO/PAR2/PL2007CD.iso.vol014+12.PAR2
http://www.pricelesswarehome.org/ftp/Archives/2007PL-ISO/PAR2/PL2007CD.iso.vol026+22.PAR2
http://www.pricelesswarehome.org/ftp/Archives/2007PL-ISO/PAR2/PL2007CD.iso.vol048+43.PAR2
http://www.pricelesswarehome.org/ftp/Archives/2007PL-ISO/PAR2/PL2007CD.iso.vol091+85.PAR2
badger
In article David Harmon says...
>> On Tue, 6 Mar 2007 05:17:42 -0000 in alt.comp.freeware, badger
>> <1516@box.ukf.net> wrote,
>
>>> >David or anyone, is it best to leave each vol.par2 as a separate
>>> >file on a website so a user can download just enough blocks to do
>>> >the repair ?
>
>>
>> Yes. Here's how it would normally work. If you create a par set with
>> default options, you would get a group of files that look something like
>> this:
>>
>> pl2007cd.par2 40404
>> pl2007cd.vol000+01.par2 378484
>> pl2007cd.vol001+02.par2 756868
>> pl2007cd.vol003+04.par2 1473332
>> pl2007cd.vol007+08.par2 2865956
>> pl2007cd.vol015+16.par2 5610900
>> pl2007cd.vol031+32.par2 11060484
>> pl2007cd.vol063+37.par2 12750884
>>
>> The first of those, pl2007cd.par2, is just the block checksum
>> information; the rest of them also contain a variable number of recovery
>> blocks. The number of recovery block is the +nn.
>>
>> The user would download the iso plus pl2007cd.par2. Checking them by
>> opening the par2 in Quickpar or par2cmdline.exe would tell if the iso
>> is OK, or if not, how many recovery blocks are needed.
>>
>> So if it says you need 4 recovery blocks, you would go back and download
>> pl2007cd.vol003+04.par2.
>>
>> If it says you need 18 recovery blocks, you would download
>> pl2007cd.vol001+02.par2 and pl2007cd.vol015+16.par2. (2 + 16 = 18)
>> So you don't have to download more recovery information than you really
>> needed. Then you run Quickpar again, it finds all the pieces, and puts
>> it back together for you.
>>
>> I use par2 quite a bit when backing up files to CD or DVD media in the
>> hope that it may save me some day if the disks become flakey.
>> http://www.quickpar.org.uk/
>>
>> Thanks for your efforts. It turns out the md5 mismatch was my goof all
>> along, so I'm all straightened out now.
.
.
.
.