[delphizip] Re: Handling CDRW packet drives
- From: "Roger Aelbrecht" <Roger.Aelbrecht@xxxxxxxxxx>
- To: <delphizip@xxxxxxxxxxxxx>
- Date: Tue, 3 Dec 2002 18:56:17 +0100
----- Original Message -----
From: "Russell Peters" <russellpeters@xxxxxxxxxxx>
To: <delphizip@xxxxxxxxxxxxx>
Sent: Monday, December 02, 2002 9:32 PM
Subject: [delphizip] Re: Handling CDRW packet drives
>
> I think we need to create a function to return whether a 'span' is going
to
> be multiple files or multiple disks (perhaps even adding an external flag)
> as there are multiple places where it checks disk type to select it's
> behavour.
> We need to integrate the test for (packet) writable CDrom and allow for
> changes with new media types/behavours.
> I would also like to be able set 'MaxSpanSize' to produce multiple files.
> Also affected is 'List' as it has know span type to expect.
> I half thought we could have a new event
> 'OnSpanName(fileVol,name,number,IsChanged)' so the user can override with
> whatever naming scheme they want to use.
This can become dangerous, we need to be able to read the naming scheme
back.
In version 1.71 I proposed three filenaming schemes.
Normal disk spanning will set as filename Archive.zip and uses the Volume
Name to
identify the disks.
Creation of multi volume archive( split on hard disk) normally created files
such as
Archive001.zip, Archive.002.zip Archive.003.zip etc..
Setting NoVolumeChange to true
makes disk spanning use the same scheme as Multi volume disks this means
filenames Archive001.zip, Archive002.zip etc..
Setting WinZipNames to true
Uses the VolumeName to identify the disks all disk have Archive.zip as
filename
(WinZip does the same)
For Multi volume archives the filenames become Archive.z01, Archive.z02
and Archive.zip for the last part.
To read the back using extract or ReadSpan
If WinZipNames is set to true
Recognise filenames Archive.z01, Archive.z02 etc.. on all types of disks
Recognise Volume names for spanned disks
if WinZipNames is false
Recognise spanned disks with Volume names for identification
Recognise multi volume archives with filenames Archive001.zip,
Arhcive002.zip etc..
on all disk types
Regards
Roger Aelbrecht
http://web.wanadoo.be/driehoeksw
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