Le dimanche 25 octobre 2009 12:45:56, James Harper a écrit : > > Le dimanche 25 octobre 2009 10:24:30, James Harper a écrit : > > > > Le dimanche 25 octobre 2009 05:14:14, James Harper a écrit : > > > > > A year or two ago I was pondering about the best way to restore a > > > > > Windows system to 'bare metal'. BartPE is kind of nice for XP and > > > > > 2003, but is fairly specific on what platforms it supports, is > > > > > legally questionable if you are using OEM licenses, and in order to > > > > > restore an XP system you need access to files from Windows 2003 > > > > > etc. I then looked at what would be involved in booting Linux (via > > > > > CD/USB/netboot/etc) and then restoring that way. At the time > > > > > though, the ACL's, ownership, and a whole load of other stuff would > > > > > be missing so there didn't seem to be much point pursuing it. > > > > > > > > > > The latest 'Advanced' release of ntfs-3g supports direct access to > > > > > the ACL's, ADS's, NTFS Attributes, DOS filenames (eg the 8.3 > > > > > filename equivalent of the Windows filename), datestamps, and > > > > > possibly EFS too. So in theory, it would be possible to extend > > > > > processWin32BackupAPIBlock to not only write out the regular file > > > > > data, but also to write out the ACL's, ADS's, etc etc. I don't even > > > > > think it would be that much work... although I've been famously > > > > > wrong about such things before :) > > > > > > > > Would be nice, but it's a terribly difficult reverse engineering > > > > process.... > > > > > > I haven't done much investigating yet, but I believe that the magic > > > code that currently retrieves the file data from the BackupRead > > > (windows backup api) stream just searches until it finds the right > > > stream. Ntfs-3g can get and set raw ACL data which I believe is in one > > > of the BackupRead streams already. Ditto for the ADS's. Not sure about > > > NTFS Attributes and DOS filename though. > > > > The problem is that it could change over the time and versions, but it's > > interresting. > > At it stands right now, with an ntfs-3g mounted volume 'getfattr -h -e hex > -n system.ntfs_acl <filename>' retrieves a hex string that is byte for > byte identical with what comes out of the BACKUP_SECURITY_DATA in the > BackupRead data stream. (the BackupRead decomposition code singles out the > BACKUP_DATA stream and ignores everything else).
It sounds very good. > Are you concerned about the xattr interface to ntfs-3g changing, or the > format of the data produced by BackupRead and consumed by BackupWrite? No, i'm not worried about any Linux change, but for Microsoft undocummented streams and apis. It will work for ACLs on this particular version, but i don't know if other attribs will be ok (like mtime, ctime, owner, etc...). > I'm not yet convinced that either the above or the run-windows-in-a-vm > solution is best, but there are still a lot of non-server devices that > don't have hardware support for virtualisation, so doing it the > virtualisation way leaves workstation rebuilds without a solution... (if > that's a concern for you - maybe not?) My workstation is able to run VirtualBox with a Windows guest (i don't remember if it wasn't possible with my previous workstation.) I'm not sure that you need the VT extention for VirtualBox+WinXP (i think that it's required for KVM). I think that run-windows-in-a-vm is a better idea than using BartPE, now if Bacula can restore acl stream from BackupWrite/Read, i would be very happy too! Bye > James > ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Bacula-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/bacula-devel
