HP (Hewlett-Packard) Ultrium Drive Manuale Utente

11 Automation Control Interface

Specification

Physical interface

•

RS-422, Drive Sense, Library Sense, Reset and Attention signals

•

A default of 9600 baud at power-on, after a tape drive reset and after an ACI reset. After

that, the library can configure the tape drive to use other baud rates (19200, 38400,

57600 and 115200 baud for HP Ultrium drives) using the Set Baud Rate command.

•

1 start bit, 8 data bits, 2 stop bits, no parity

Protocol

•

Binary data packets, including checksum, packet length, status, sequence number,

•

XON/XOFF flow control

•

Positive or negative acknowledgement of transmission

•

Constant polling not necessary— the drive returns status upon completion of each

command

ACI command set

The following ACI commands are supported on HP Ultrium drives:

Mandatory Commands

Optional Commands

SCSI Surrogate Commands

00h Get Drive Info

40h Send SCSI Command

70h Configure SCSI Surrogate

01h Load

42h Send Firmware Image

71h Get SCSI CDB

02h Unload

43h Get Firmware Segment

72h Get SCSI Data

03h Get Drive Status

49h Get Buffer Size

73h Send SCSI Data

04h Set Drive Configuration

4Ah Send Firmware Segment

74h Send SCSI Status

05h Get Drive Configuration

4Bh Set Time

06h Reset

4Ch Get Time

07h Set Baud Rate
08h No Op
09h Get Error Info

0Ah Acknowledge Attention