>>>>> "db" == Dave Brown <dbr...@csolutions.net> writes:
db> CRC/Checksum Error Detection In SANmelody and SANsymphony,
db> enhanced error detection can be provided by enabling Cyclic
db> Redundancy Check (CRC) [...] The CRC bits may
db> be added to either Data Digest, Header Digest, or both.
Thanks for the plug, but that sounds like an iSCSI feature, between
storage controller and client, not between storage controller and
disk. It sounds suspiciously like they're advertising something many
vendors do without bragging, but I'm not sure. Anyway we're talking
about something different: writing to the disk in checksummed packets,
so the storage controller can tell when the disk has silently returned
bad data or another system has written to part of the disk, stuff like
that---checksums to protect data as time passes, not as it travels
through space.
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