The HSC family offered a superset of capabilities compared to the
UDA50/QDA50. In particular,
- tape as well as disk support (TMSCP as well as MSCP);
- controller-based disk to tape backups and tape to disk restores;
- controller-based disk to disk duplication;
- controller-based volume shadowing (RAID 1).
UDA50/QDA50 did not support tape drives, disk duplication, or
controller-based volume shadowing.
HSC supported some data caching; UDA50/QDA50 did not.
/Bob
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