ALP Format Medium Command
August 2016 Automatically Linked Partitioning 277
ALP Format Medium Command
This vendor unique Format Medium command is used to start a new ALP logical
volume. The command must be issued only after positioning the tape to the
beginning of an ALP. After this Format Medium command is processed writes will
start a block ID 0.
TABLE C-3 Format Medium Command
Byte
Bit
76543210
0 Page Code (04h)
1 Reserved Verify Immed
2 Reserved
Format
3
thru
4
Transfer Length
5 RSVD
ALP
Control Byte
Parameter Value
Verify: 0 = Do not verify format operation.
Immed: Immediate 0 = Return status after format completes.
Format 8h = Vendor unique - start new ALP logical volume.
Transfer Length 0000h = No data is transferred for format medium command.
ALP 1 = Start new ALP logical volume.
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