Full Disclosure mailing list archives
NTFS, broken by design? (was Re: Is this a Virus?)
From: "Bruce Ediger" <eballen1 () qwest net>
Date: Sat, 31 Dec 2005 10:10:12 -0700 (MST)
On Sat, 31 Dec 2005, Geo. wrote:
Actually not. If you fill an NTFS disk with files that are 1K or smaller it forces the MFT to suck up the whole disk, small files are stored entirely in the MFT instead of like larger files which have an MFT entry and a data segment for storage area. Once that happens it's not possible to shrink the MFT so the disk becomes useless for storing files larger than 1K even though it shows as 90% empty and at the same time it allows the system to continue running and spreading the virus.
I believe that the model for NTFS was DEC's ODS-2, used in VAX/VMS, right? Did/does ODS-2 exhibit this same feature? ODS-2 didn't store data of small files in the file headers, as I recall. Also, has Microsoft change the implementation of "DIR" or the MFT? I seem to recall that appropriate flags to DIR would show you $MFT and $MBR and things like that, but I can't get that to work on the Windows XP boxes available to me. Booting Knoppix doesn't show me the MFT either, so, what's the scoop? _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
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- Re: Is this a Virus? wac (Dec 31)
- Re: Is this a Virus? Geo. (Dec 31)
- NTFS, broken by design? (was Re: Is this a Virus?) Bruce Ediger (Dec 31)
- Re: Is this a Virus? Leif Ericksen (Dec 29)
- Re: Re: [MailServer Notification]To recipient:Message matched eManager setting and action was taken. Exibar (Dec 29)