floppy disk | Hard disk drive | hard disk drive | Golden Disk Awards | Universal Disk Format | disk | Floppy disk | Alderson disk | Hard Disk 20SC | Hard Disk 20 | ESP-Disk | Double-sided disk | disk storage | Port mirroring | Poincaré disk model | Macintosh External Disk Drive | Disk storage | Disk partitioning | Disk'O | disk (mathematics) | Disk II | Disk formatting | Disk buffer | Disk | Direct-to-disk recording | area of a disk |
SFT II is a disk mirroring or duplexing system based on RAID 1; mirroring refers to two disk drives holding the same data, duplexing uses two data channels/controllers to connect the disks (fault tolerance on disk and optionally data channel level).
The disk subsystem was either accessible from multiple nodes (using a Fibre Channel SAN or dual-ported SCSI) or used cross-node mirroring in a similar fashion to DRBD.