[Coco] luns and scsi disks
t.fadden at cox.net
Sat Feb 18 10:41:28 EST 2017
Below is the listing for super driver disk descriptor.
Why do you even have lun number even on there? it has no relevance. A
lun can be an entire disk, a partition, or several disks raided in any
fashion. It is a logical name given to a host so they don't have to know
what lies beneath at the hardware level. In the case of coco's the lun
and scsi ID is basically the exact same thing. If you partition the
disk, I guess you could define each partition as a lun. the "nam" you
give the disk/partition is really what the definition of a lun is. In
practice, luns are used in large san's where several hosts are
connecting to their storage over the san, and the large data farm of
storage is split up into "luns" to present to the host.
(offset $16) for SCSI Low Level Driver
SCSI Logical Unit Number of drive (0-7) (ignored if bit 3 is 1)
Turbo Mode: 1 = use accelerated handshaking, 0 = standard
HDB-DOS Partition Flag
SCSI ID of the drive or controller (0-7)
"Hey Schmidt, don't forget about the six P's.
Proper Preparation Prevents Piss-Poor Performance!"
More information about the Coco