Alp Read Position Command; Table C-5 Alp Read Position Command - Oracle StorageTek T10000 Reference Manual

ALP Read Position Command

This vendor unique version of the Read Position command is used to read to the
current ALP index.

TABLE C-5 ALP Read Position Command

Byte 7
0
1
2 (MSB)
thru
6
7 (MSB)
thru
8
9 PPI
Parameter
TCLP: Total Current Logical Position
LONG: Long Format
BT: Block address Type
Allocation Length
PPI: Physical Position Indicator
ALP
August 2016
6 5
Page Code (34h)
Reserved
Allocation Length
ALP
Value
0 = Return first and last block location
0 = Return 20 bytes of data
1 = Return 32 bytes of data (PPI only)
0 = SCSI logical block address
1 = Vendor specific (ignored)
0000h = 20 bytes returned (PPI returns 32 bytes)
0 = Return Normal read position
1 = Return Read Physical Position Indicator data
ALP vendor unique read position
0 = Normal read position
1 = Read ALP index
Bit
4 3 2
TCLP
Reserved
Control Byte
Automatically Linked Partitioning 279
ALP Read Position Command
1 0
LONG BT
(LSB)