iSCSI : Digest Error recovery causes data corruption

[Pierre Labat <pierre_labat@hp.com>]

Hello,


I would invite you to revisit the Mike Krause mail about
"iSCSI Data Integrity - Digests".

If Alternative 1 or 2 is adopted, when a digest error (CRC)
occurs, the segment could be discarded, and TCP will
retransmit. For software implementation with an hardware
assist to calculate the CRC, (same kind of the one that exists
now to calculate the checksum now), if a CRC error is detected
it could be assimilated as a checksum error.
Hence there is no need to overload the iSCSI protocol
to deal with digest errors, because the iSCSI layer could not
see them.

Why to do complicate when simple an efficient can be achieved?

Regards,

Pierre