I'm not sure about the recovery data, but p7zip will handle multivolume archives and has a superior compression ratio to rar. Plus it is GPL.
Lorenzo -- -----BEGIN GEEK CODE BLOCK----- Version: 3.12 GCS d- s:+ a- C+++ UL++++ P+ L+++ E- W++ N o K- w--- O M V- PS+++ PE Y+ PGP++ t++ 5+ X+ R tv-- b++ DI-- D+ G e* h---- r+++ y+++ ------END GEEK CODE BLOCK------
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