Microsoft KB Archive/98956

= LM File Permission Enforcement on a CD-ROM Drive =

Article ID: 98956

Article Last Modified on 10/31/2006



This article was previously published under Q98956



SUMMARY
LAN Manager 2.0 and 2.0a cannot differentiate between file permissions for CD-ROM Drive 1 and CD-ROM Drive 2. It can determine only that there is an E drive, and it enforces whatever permissions have been created for files or directories on E, no matter which CD happens to be in the CD-ROM drive. The same is true for floppy disks and drives, and for any other removable media.



MORE INFORMATION
ACLs (Access Control Lists) for CD-ROM, floppy, and other removable media are kept in the NET.ACC file (as are hard disk FAT partition ACLs).

ACLs created for a file or directory on a CD-ROM drive are recorded in NET.ACC with reference to a drive letter and the designated path or file name. Thus, if you assign read-only access privilege to User1 for the file \DOCS\BOOK.BAR on a CD-ROM drive that the operating system sees as drive E, the ACL entry in NET.ACC looks like this: FILE ID            USER        PERMISSIONS e:\docs\book.bar   User1        R This entry remains in NET.ACC regardless of which CD is in the CD-ROM drive. Thus, if you remove CD 1 and insert CD 2 and give User1 read and write permission on the file \STUFF\SANE.TXT file on that CD, the NET.ACC entries look like this: FILE ID            USER         PERMISSIONS e:\docs\book.bar   User1         R e:\stuff\sane.txt   User1         RW Now, if you remove CD 2 and re-insert CD 1, the ACL referencing E:\DOCS\BOOK.BAR remains in NET.ACC and is still enforced.

Additional query words: 2.20 2.2

Keywords: kbnetwork KB98956

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