Hello, On Thu, Sep 29, 2011 at 4:42 PM, Zdenek Kabelac <zkabelac@xxxxxxxxxx> wrote: > Dne 29.9.2011 15:35, Kasatkin, Dmitry napsal(a): >> Hello All, >> >> I would like to implement such block device, which can store >> additional information along with the block data. >> For example. so if file system has 4k block, I would like to store >> 4k+256b of additional information... >> >> Can such block device be implemented with device mapper? >> > > Yes - i.e.the old snapshot target stores the block and it's remapping info > (thought the size info is much smaller then 256b) > 1. Old snapshot target? Where is it... 2. Isn't it stores some data at the beginning of the block device - in the header.. Like LUKS does with dm-crypt? Thanks > Zdenek > > -- > dm-devel mailing list > dm-devel@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/dm-devel > -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
