| Component | HUS VM | HUS 150 | HUS 150DC | HUS 130 | HUS 110 |
|---|---|---|---|---|---|
| Nondisruptive component replacement | Major field replaceable units | Major field replaceable units | Major field replaceable units | Major field replaceable units | Major field replaceable units |
| Nondisruptive hot-pluggable disks | Yes | Yes | Yes | Yes | Yes |
| Nondisruptive microcode updates | Yes | Yes | Yes | Yes | Yes 1 |
| Nondisruptive data migration | Yes, HDS to HDS | No | No | No | No |
| Host transparent data migration | Yes, HDS to any virtualized storage | No | No | No | No |
| 100% data availability guarantee | Yes | No | No | No | No |
| Continuous disk background checks | Yes | Yes | Yes | Yes | Yes |
| Host failover | Hitachi HiCommand® Dynamic Link Manager software | Hitachi HiCommand® Dynamic Link Manager software | Hitachi HiCommand® Dynamic Link Manager software | Hitachi HiCommand® Dynamic Link Manager software | Hitachi HiCommand® Dynamic Link Manager software |
| VERITAS DMP support | Yes | Yes | Yes | Yes | Yes |
| Cache backup to SSD | Yes | Yes | Yes | Yes | Yes |
| Maximum hot spares | 64 | 80 | 80 | 30 | 15 |
| Hi-Track® "call-home" service/remote maintenance tool | Yes | Yes | Yes | Yes | Yes |
1 Dual block controller card configurations required for nondisruptive microcode updates.
