MORITA Kazutaka <morita.kazutaka at lab.ntt.co.jp> writes: > Thanks, the reason of this problem is that you use a direct I/O option > but the offset and length of "collie vdi write" is not aligned to > sector size (512 bytes). I didn't expect that because VM's I/O > requests are always sector aligned. > > Is it okay to exit with error when the offset size is not aligned to > 512 bytes? And is it okay to enlarge the read/write buffer length to > the sector aligned size when it is not aligned? If possible, I don't > want to treat "collie vdi read/write" as special cases. Hi. Yes, I think it's fine to error out if reads and writes aren't block-aligned, yes. However, I'm very puzzled that you've identified this as the problem here, because the offset is zero: [2652] collie vdi write dc9d3806-cafd-47c5-8711-9b4f99b5b061 0 failed to write object, b1028300000000 I/O error failed to write vdi Exit code: 1 and I think it should have been attempting to write exactly 5<<20 bytes, which is again block-aligned. Cheers, Chris. |