Re: how to make my RAID device WORM(write once and read many)
Please don't top-post. prasadam kumar [EMAIL PROTECTED] writes: Thanks for responding to my query, actually it is a raid5 storage device it contains firewire and usb ports, through this interface a user can store data to the raid5 device irrespective of file system. once he copied data to the device it should be immutable(i.e cannot be modify and delete). Can u suggest any approach to achieve this task. If the system immutable and system undeletable flags are not good enough for what you want, then the OS can't help you, and you will need a hardware solution. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: how to make my RAID device WORM(write once and read many)
prasadam kumar wrote: hai, Thanks for responding to my query, actually it is a raid5 storage device it contains firewire and usb ports, through this interface a user can store data to the raid5 device irrespective of file system. once he copied data to the device it should be immutable(i.e cannot be modify and delete). Can u suggest any approach to achieve this task. bye ppk --- [EMAIL PROTECTED] wrote: prasadam kumar wrote: hai, I am working Raid5 storage device and i want to make my device WORM(write once and read many) and undeleatable. I formated the target device in vfat, when i am mounting the device in host machine it should behavie like WORM. To achive this feature whether i have to change in host machine or target machine, which one is better approach and plz tell me how to achive this. bye ppk The first question is: for which purpose do you need this feature ? In any case, you will need to have backup for this RAID. From my point of view, it looks like some version control management system. May be, it will be wiser to use it ? As i understand, you can't get this feature from plain filesystem. Even if you hack vinum to allow write only once in every block, usual filesystem will not work on such device. You can make something like database with add-only interface (MySQL + some scripting) and allow access from Web interface. Take a look on some SCM solutions, it may be what you want. -- Best Regards, Alexander Derevianko ___ freebsd-questions@freebsd.org mailing list If users can't delete files, it indeed means that any attempt to open file for writing must create a new version of the file. Or any user can put garbish (or zero length file) into any available to him. Another approach will be to change permissions such that nobody can open again once created file. It seems for me, that it must be possible to obtain such functionality via ACL permissions. But unfortunelly i don't have expirience with ACL permissions in latest FreeBSD's. In any case, something like CVS repository with only last revision visible from user side will be best solution. Where is some SCM systems based on versioning filesystem, you can take a look on them. For example, here http://www.daveeaton.com/scm/CMFAQ.html But it seems for me that most of them are commercial. If you don't want to pay for it and have much spare time, you can make own NFS server which will work under plain filesystem layer and will implement versioning. Think deep about you task, and try to imagine how users will use this feature. -- Best Regards, Alexander Derevianko ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: how to make my RAID device WORM(write once and read many)
On Mon, Apr 18, 2005 at 09:27:48AM -0400, Lowell Gilbert wrote: Please don't top-post. prasadam kumar [EMAIL PROTECTED] writes: Thanks for responding to my query, actually it is a raid5 storage device it contains firewire and usb ports, through this interface a user can store data to the raid5 device irrespective of file system. once he copied data to the device it should be immutable(i.e cannot be modify and delete). Can u suggest any approach to achieve this task. If it's OK to invoke a shell-script to do the archiving, and if you're using UFS it would be possible, I think. That script should do the following: - check for name clashes (abort with an error if a file already exists). - copy the file to the target disk. - chmod ugo-w the file to remove all write permissions. - chflags schg,sunlnk,uchg,uunlnk file Of course this is not foolproof, because the superuser can change the flags and permissions. Another option would be to use a revision control system that can handle arbitrary files like subversion. If you write (commit) a new version of a file, the old version is not lost. This also supposes that you create a wrapper script to make things easier (because the first write has to be an add rather than a commit, and other details like creating directories etc). Roland -- R.F. Smith /\ASCII Ribbon Campaign r s m i t h @ x s 4 a l l . n l \ /No HTML/RTF in e-mail http://www.xs4all.nl/~rsmith/ X No Word docs in e-mail public key: http://www.keyserver.net / \Respect for open standards pgpTYJhwAhBXS.pgp Description: PGP signature
Re: how to make my RAID device WORM(write once and read many)
hai, Thanks for responding to my query, actually it is a raid5 storage device it contains firewire and usb ports, through this interface a user can store data to the raid5 device irrespective of file system. once he copied data to the device it should be immutable(i.e cannot be modify and delete). Can u suggest any approach to achieve this task. bye ppk --- Александр Деревянко [EMAIL PROTECTED] wrote: prasadam kumar wrote: hai, I am working Raid5 storage device and i want to make my device WORM(write once and read many) and undeleatable. I formated the target device in vfat, when i am mounting the device in host machine it should behavie like WORM. To achive this feature whether i have to change in host machine or target machine, which one is better approach and plz tell me how to achive this. bye ppk The first question is: for which purpose do you need this feature ? In any case, you will need to have backup for this RAID. From my point of view, it looks like some version control management system. May be, it will be wiser to use it ? As i understand, you can't get this feature from plain filesystem. Even if you hack vinum to allow write only once in every block, usual filesystem will not work on such device. You can make something like database with add-only interface (MySQL + some scripting) and allow access from Web interface. Take a look on some SCM solutions, it may be what you want. -- Best Regards, Alexander Derevianko ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] __ Do you Yahoo!? Plan great trips with Yahoo! Travel: Now over 17,000 guides! http://travel.yahoo.com/p-travelguide ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: how to make my RAID device WORM(write once and read many)
prasadam kumar wrote: hai, I am working Raid5 storage device and i want to make my device WORM(write once and read many) and undeleatable. I formated the target device in vfat, when i am mounting the device in host machine it should behavie like WORM. To achive this feature whether i have to change in host machine or target machine, which one is better approach and plz tell me how to achive this. bye ppk The first question is: for which purpose do you need this feature ? In any case, you will need to have backup for this RAID. From my point of view, it looks like some version control management system. May be, it will be wiser to use it ? As i understand, you can't get this feature from plain filesystem. Even if you hack vinum to allow write only once in every block, usual filesystem will not work on such device. You can make something like database with add-only interface (MySQL + some scripting) and allow access from Web interface. Take a look on some SCM solutions, it may be what you want. -- Best Regards, Alexander Derevianko ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
how to make my RAID device WORM(write once and read many)
hai to all, I am working Raid5 storage device and i want to make my device WORM(write once and read many) and undeleatable. I formated the target device in vfat, when i am mounting the device in host machine it should behavie like WORM. To achive this feature whether i have to change in host machine or target machine, which one is better approach and plz tell me how to achive this. bye ppk __ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
how to make my RAID device WORM(write once and read many)
hai, I am working Raid5 storage device and i want to make my device WORM(write once and read many) and undeleatable. I formated the target device in vfat, when i am mounting the device in host machine it should behavie like WORM. To achive this feature whether i have to change in host machine or target machine, which one is better approach and plz tell me how to achive this. bye ppk __ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
