On 04/24/2012 11:48 AM, Jim Meyering wrote: > Pádraig Brady wrote: >> On Solaris 10 at least you need to use dd iflag=fullblock >> to avoid short reads. Also it's relatively slow when >> you just want non NUL data as opposed to pseudo random data. >> >> * cp/fiemap-empty: Convert /dev/zero rather than using /dev/urandom. >> * dd/sparse: Likewise. > > Thanks. Do either of these avoid an actual failure?
no > With those changes, the affected files are then very compressible. > With some file system types/options, won't they occupy far fewer > blocks than before? Good point. The dd/sparse one could then fail the alloc check. The fiemap-empty change is only 5120 bytes too. OK I'll drop this. cheers, Pádraig.
