jdr@sloth.mlb.semi.harris.com (Jim Ray) (06/14/91)
Anyone know if the DSSI disks are SCSI ( or some form thereof )? If not, what type of interface do they use? Thanks, -- Jim Ray Harris Semiconductor Internet: jdr@semi.harris.com PO Box 883 MS 62B-022 Phone: (407) 729-5059 Melbourne, FL 32901
alan@shodha.enet.dec.com ( Alan's Home for Wayward Notes File.) (06/14/91)
In article <1991Jun13.200046.4932@mlb.semi.harris.com>, jdr@sloth.mlb.semi.harris.com (Jim Ray) writes: > Anyone know if the DSSI disks are SCSI ( or some form thereof )? DSSI is not SCSI, though at times it looks a lot like it. First the storage protocols used are MSCP for disks and TMSCP for tapes. As with SCSI each "device" on it has an imbedded disk or tape controller. The DSSI devices are called Integrate Storage Elements (ISEs). One way of looking at is that each ISE is a single drive HSC and the DSSI is the CI. > > If not, what type of interface do they use? Yet another DEC proprietary DSA thing. I suspect that people that designed looked at SCSI and decided they could do better. They probably use EDC/ECC instead of parity for data integrity on the bus. They may have extended the 6 meter cable limit or least made sure that all 6 meters is usable. If DSSI drives were closer to SCSI drives in price, I'd prefer them for storing my files. > > Thanks, You're welcome. > -- > Jim Ray Harris Semiconductor -- Alan Rollow alan@nabeth.cxn.dec.com
henderson@esvax.hamavnet.com (06/14/91)
In article <1991Jun13.200046.4932@mlb.semi.harris.com>, jdr@sloth.mlb.semi.harris.com (Jim Ray) writes: > Anyone know if the DSSI disks are SCSI ( or some form thereof )? No, they are not. > > If not, what type of interface do they use? They use DSSI interface. > > Thanks, You're welcome. -- Javier Henderson Engineering Services Avnet Computer Los Angeles, CA henderson@hamavnet.com {simpact,asylum,elroy,dhw68k}!hamavnet!henderson