• Seek ordering — Reorders I/O requests thereby BA353-AH Exp.Box 2x SCSI 1x TZ30 effective I/O access time • Overlapped seeking — Transfers data from one disk while simultaneously seeking on any other disks with outstanding I/O requests • Rotational optimization — BA353-AH Exp.Box 2x SCSI 1x TZ30 the disk nearest the beginning sector when more than one disk is positioned on cylinder • Express queue — BA353-AH Exp.Box 2x SCSI 1x TZ30 Provides immediate servicing of I/O requests if required (architectural) • Speed matching buffers — Use high-speed RAM to smooth the disk data burst rates to host BA353-AH Exp.Box 2x SCSI 1x TZ30 I/O bus (architectural) • 170-bit error correction code (BA353-AH Exp.Box 2x SCSI 1x TZ30) — Detects and corrects up to eight independent 10-bit error bursts per section, reducing the possibility of uncor- rectable data errors that result from media degradation • Redundant header addresses — Records disk block header information four times for,more reliable sector location • Automatic sector relocation — Automatically removes defective blocks from service, and replaces them with others, without causing shrinkage in usable space • Error detection code — Checks controller memory and data path errors as well as BA353-AH Exp.Box 2x SCSI 1x TZ30 hardware operation • Error reporting — Reports all significant errors to the host system, enabling detection and preventive action before susbsystem failure or data loss (architectural)