Ola, Antonio Diaz Diaz <[email protected]> schreibt am 11.11.2010 18:47 Uhr:
> Ddrescue can use O_DIRECT (option -d), but be aware that "Using direct > disc access, or reading from a raw device, may be slower than normal > cached reading for hard discs (but faster for floppies). In this case > you may want to make a first pass using normal cached reads, and use > direct disc access, or a raw device, only to recover the good sectors > inside the failed blocks." In my experience on Mac OS (which is probably the widest spread BSD variant) using the raw character special device (/dev/rdiskX) is actually much faster than using the block device (/dev/diskX) in both reading and writing. Since I confirmed a difference of up to factor 4 in several tests, I now always use the raw device. Thanks for this indispensable tool, Florian _______________________________________________ Bug-ddrescue mailing list [email protected] http://lists.gnu.org/mailman/listinfo/bug-ddrescue
