Messages in this thread | | | Date | Sat, 27 May 2006 11:25:22 +0400 | From | Michael Raskin <> | Subject | Re: Intercept write to disk |
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Mishael A Sibiryakov wrote: > Hm, i need a somthing transparent, this tool is for make image of entire > disk/partition on fly. Because tool is get some time for work i need to > store changes between start and end of the process for append it to > image. Probably i thinking in wrong way and i need a something else.
Maybe you want to back up a partition as it was at some moment in the past (exactly)? Then you have to make a device-mapper-snapshot out of it. You need to install device-mapper module and userspace tools, and make the following: original device is never used directly; instead a snapshot-origin mapping is made of it and is always used. When you need snapshot, you create a file (on another partition, of course; maybe even in the memory if you are sure you will do everything quickly enough), make it a loopback device, and make a snapshot out of snapshot-origin you have and this loopback for changes rollback. Maybe it is also better to mount -o remount,sync the device for the time of creating snapshot device in order to have less problems with consistency. And remount it back when you start copying. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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