Quantum DLTtape DLT1 Manuel utilisateur

DLT™1/7 TAPE UNIT INSTALLATION

Digital Unix 4.0;

IBM RISC System/6000 must have the appropriate SCSI interface for DLT drive to attached to, i.e., a SCSI

single-ended DLT drive can be attached only to a SCSI single-ended interface. The same is true for SCSI

differential attachment. After the DLT tape peripheral has been attached, you will need to perform certain

system operations that allow the DLT tape peripheral to be recognized.

Adding device definitions

Digital UNIX version 4.0 uses Dynamic Device Recognition to simplify adding support for

a new SCSI device. Adding a new device is a three-step process:

1. Use the ed, vi, or jot editor to add or modify a tape drive definition in the

/etc/ddr.dbase file. This file contains sections for each device definition. Adding a

new device definition is usually as easy as copying and pasting information from a

similar device and making one or two modifications.

2. Make the new definition(s) known to the system by issuing the command ddr_config

c /etc/ddr.dbase.

3. (optional) Generate the device files by running /dev/MAKEDEV for the added device.

When these steps are complete, your system is ready to use the new tape drive. You do not

need to reboot. If the new tape drive does not operate as youexpect, you can repeat the

above steps to modify the definition until the device operates correctly.

Procedure for modifying the device definitions

Note: The device definitions in this document are for Digital UNIX version

4.0a. Later versions may contain slightly different default entries in the

/etc/ddr.dbase file.

Follow these steps to add a new tape drive to the /etc/ddr.dbase file:

Important: Always create a backup copy of the file before you modify it.

4. Login with root privileges.

5. Go to the /etc directory:

6. cd /etc

7. Make a backup copy of the original ddr.dbase file:

8. cp /etc/ddr.dbase /etc/ddr.dbase.orig

9. Edit the ddr.dbase file to add the new tape drive. See the following sections for the

required modifications for each type of Exabyte tape drive.

10. vi ddr.dbase

11. Save the changes to the file:

12. :w!

13. Go to the /dev directory:

14. cd /dev

15. Create device files for the new tape drive:

16. MAKEDEV [id]

Where [id] is the SCSI ID of the new tape drive. For example, MAKEDEV tz5 creates device

files for a tape drive at SCSI ID 5.

Assuming that no device files were previously created for any tape drives, the MAKEDEV

command creates the following eight device files in the /dev directory:

/dev/rmt0l Low density rewinding device

/dev/rmt0h High density rewinding device

/dev/rmt0m Medium density rewinding device

/dev/rmt0a Alternate density rewinding device

/dev/nrmt0l Low density non-rewinding device

/dev/nrmt0h High density non-rewinding device

/dev/nrmt0m Medium density non-rewinding device

/dev/nrmt0a Alternate density non-rewinding device

Your system is now ready to use the new tape drive.

You need to create device files for each tape drive only once. If you add more than one tape

drive, the next time you run MAKEDEV, it will create /dev/[n]rmt1[lhma], then

/dev/[n]rmt2[lhma], and so on for the additional tape drives.

Modifications for DLT1 tape drives

# ####################################################################

# TAPES:

# ####################################################################

# The "default" tape entry is as follows:

# PARAMETERS:

# TypeSubClass = rdat

# BlockSize = 0

# MaxTransferSize = 0xFFFFFF # 16MB-1 tape default

# BadBlockRecovery = disabled

# SyncTransfers = enabled

# DynamicGeometry = false

# Disconnects = enabled

# TaggedQueuing = enabled

# CmdReordering = disabled

# LongTimeoutRetry = disabled

# DisperseQueue = true

# WideTransfers = enabled

# WCE_Capable = false

# PwrMgmt_Capable = true

# Additional_Flags = 0x0

# TagQueueDepth = 32

# ReadyTimeSeconds = 300 # seconds

# CMD_PreventAllow = notsupported

# CMD_ExtReserveRelease = notsupported

# CMD_WriteVerify = notsupported

# Additional_Cmds = 0x0

# InquiryLength = 36

# RequestSenseLength = 64

# DENSITY:

# #

# DensityNumber = 0,1,2,3,4,5,6,7

# DensityCode = default

# Buffered = 0x1

# ####################################################################

SCSIDEVICE

# Matches DLT1

Type = tape

Name = "QUANTUM" "DLT7000"

PARAMETERS:

TypeSubClass = tk

TagQueueDepth = 0

MaxTransferSize = 0x0ffffff # (16MB - 1)

ReadyTimeSeconds = 120 # seconds

DENSITY:

DensityNumber = 0

DensityCode = 0x86

CompressionCode = 0x0

Buffered = 0x1

DENSITY:

DensityNumber = 1

DensityCode = 0x40

CompressionCode = 0x0

Buffered = 0x1

DENSITY:

DensityNumber = 2,4,5,6,7

DensityCode = 0x87

CompressionCode = 0x0

Buffered = 0x1

DENSITY:

DensityNumber = 3

DensityCode = 0x7f

CompressionCode = 0x0

Buffered = 0x1

DLT Mini-Library Usage

The Solaris operating system does not support SCSI-2 media changer device commands. Therefore, an

installed DLT™7 mini-library can not be utilized in random access mode and can only be accessed in

sequential mode. Refer to the DLT1/DLT7 Install and Operations Guide manual for detailed description of

these access modes.

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