User Guide

Ampex 1308904-X4 Preliminary Draft 4-5
ACL Application Programmer’s Guide libacl_intro_api
ACL ELEMENTS
SCSI addresses are assigned to all ACL elements (locations) that can contain a tape cartridge.
libacl API functions recognize the addressable locations described below.
2XX and 4XX ACLs can move a tape cartridge from a storage bin to the tape drive, or from
the tape drive to a storage bin
8XX ACLs can move a tape cartridge to or from any of the addressable elements (tape drive,
storage bin, IMEX bin, or CHS)
ACL Series 2XX and 4XX
Data Transfer Element The ACL tape drive. Its SCSI address is 100d (0x64).
Transport Element The ACL cartridge handling system (CHS). Its SCSI address is 01.
Storage Element One of the seven storage bins in the ACL. The bins are assigned
SCSI address 1000d / 0x3E8 (bottom bin) through 1006d / 0x3EE
(top bin).
ACL Series 8XX
Data Transfer Element The ACL tape drive(s). Up to four tape drives can be installed in the
ACL. The drives are assigned SCSI address 100d / 0x64 (bottom
drive) through 103d / 0x67 (top drive).
Transport Element The ACL cartridge handling system (CHS). Its SCSI address is 01.
Storage Element One of the 248 storage bins in the ACL. The bins are assigned SCSI
addresses in the following sequences:
Bin Numbers SCSI Addresses
A01-A32 1031-1000 (0x407-0x3E8)
B01-B32 1063-1032 (0x427-0x408)
C01-C32 1095-1064 (0x447-0x428)
D01-D32 1127-1096 (0x467-0x448)
E01-E32 1159-1128 (0x487-0x468)
F01-F32 1191-1160 (0x4A7-0x488)
G01-G32 1223-1192 (0x4C7-0x4A8)
H01-H06 1247-1242 (0x4DF-0x4DA)
H15-H32 1241-1224 (0x4D9-0x4C8)
Import/Export Element One of the eight import/export (IMEX) bins in the ACL. Each
IMEX bin has a SCSI address in the range of 17 / 0x11 (top IMEX
bin) through 10 / 0x0a (bottom IMEX bin).