[dba-Tech] Long Directory names on a CD-ROM

John B. john at winhaven.net
Wed Oct 1 11:43:46 CDT 2003


Marty,
If this helps:
Windows 2000 won't allow me to have a file name of over 205 characters.
My UDF (InCD version 3.38.1) won't copy a file name of over 127 characters.

jb

> -----Original Message-----
> From: dba-tech-bounces at databaseadvisors.com
> [mailto:dba-tech-bounces at databaseadvisors.com]On Behalf Of MartyConnelly
> Sent: Tuesday, September 30, 2003 2:24 PM
> To: Discussion of Hardware and Software issues
> Subject: [dba-Tech] Long Directory names on a CD-ROM
> 
> 
> I was just wondering if any anyone has had problems storing data to 
> CD-ROM's  with long directory and filenames like
> "c:\documents\academic\texts\journal articles\in progress...[etc 
> etc]..\my new article.doc".
> I know that Microsoft uses the Joliet format which is the ISO-9660 
> level-3 with extensions.
> --------------------------------------------------------------
>  This has the following limits.
> On Joliet compliant media, however,
>  the length of a directory identifier shall not exceed 128, to allow for 
> longer directory identifiers.
>  the length of a filename identifier shall not exceed 128
> 
> Joliet compliant media shall comply with the remainder of ISO 9660 
> Section 6.8.2.1, so that for each file recorded, the sum of the 
> following shall not exceed 240:
> 
> the length of the file identifier;
> the length of the directory identifiers of all relevant directories;
> the number of relevant directories.
> The above lengths shall be expressed as a number of bytes.
> -----------------------------------------------------------------
> The articles on Microsoft does not explicitly explain if this is unicode 
> lengths or not..
> or not . Has anyone seen any articles explaining this or its 
> ramifications for CD storage.?
> Or anyway around this limit for CD storage with Joliet because otherwise 
> the total file names
> are truncated.
> 
> I know there is a UDF format based on ISO/IEC 13346 (which is closely 
> related to ECMA-167)
> but this writes in packets and requires specialized drivers.
> I have heard of  a Mount Rainier format for CD's that maybe incorporated 
> in future MS OSes
> I have even heard of  BlueRay from phillips with error correction and 25 
> Gb formats
> but I an stuck with Joliet for archiving at present.
> 
> 
> 
> 
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