Digital Equipment RWZ52 User manual

RWZ52OpticalDiskDrive
User'sGuide
Order Number: EK-RWZ52-UG. A01
Digital Equipment Corporation
Maynard, Massachusetts

April 1994
The information in this document is subjet to change without notice and should not be construed as a commitment
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ZK5909

Contents
Drive Characteristics 1-1
Features of the RWZ52 Multifunction Optical Disk Drive.......................................................1-2
Performance Characteristics ....................................................................................................1-3
Media Characteristics..............................................................................................................1-4
Interface..................................................................................................................................1-4
Environmental Specifications..................................................................................................1-5
AC Power Requirements (Standalone).....................................................................................1-5
Reliability and Service.............................................................................................................1-6
Physical Characteristics...........................................................................................................1-6
Setting up the RWZ52 2-1
Preparing the environment.......................................................................................................2-1
Clearance requirements.....................................................................................................2-1
Location requirements ......................................................................................................2-1
Rear panel features..................................................................................................................2-2
To set the SCSI ID............................................................................................................2-3
To set the operation mode.................................................................................................2-4
Connecting to the host computer..............................................................................................2-5
Troubleshooting.......................................................................................................................2-6
Using Optical Disks 3-1
Choosing an optical disk..........................................................................................................3-2
Labeling an optical disk cartridge............................................................................................3-3
Write-protecting an optical disk...............................................................................................3-4
Maintaining an optical disk in good condition .........................................................................3-5

Operating the RWZ52 4-1
Identifying front panel features................................................................................................4-2
To manually eject a cartridge ..................................................................................................4-3
Software Applications For The RWZ52 5-1
Product Numbers Options and Supplies A-1
Figures
Rear Panel Features.................................................................................................................2-2
Proper Label Positions.............................................................................................................3-3
Write-Protect Button Location.................................................................................................3-4
Front Panel Features................................................................................................................4-1
Tables
RWZ52 Supported Options......................................................................................................5-2
Optical Library Products Matrix............................................................................................. A-1
Basic Supplies and Reorderable Parts..................................................................................... A-2
Related Documentation .......................................................................................................... A-3
iv

Preface
Purpose of This Guide
This guide provides information on setting up and using the RWZ52
Optical Disk Drive.
Who Should Use This Guide
This guide is written for owners and users of the RWZ52 Optical Disk
Drive.
Structure of This Guide
This guide is organized as follows:
Chapter 1: Drive Characteristics - This chapter provides an overview
of the RWZ52 Optical disk drive. Included are tables listing the drive's
physical, environmantal, electrical, reliability, and performance
specifications.
Chapter 2: Setting up the RWZ52 - Instructions on choosing a location,
configuring the drive, and connecting it to the host computer are
contained in this chapter.
Chapter 3: Using Optical Disks - This chapter explains how to label
and write-protect optical disks. In addition, suggestions are provided for
the proper care and handling of disks.
Chapter 4: Operating the RWZ52 - The front panel features are
described in this chapter. A procedure for manually ejecting a cartridge
is included as well.
v

Chapter 5: Software Applications for the RWZ52 - This chapter
provides a summary of some of the supported software applications and
operating systems available for the RWZ52.
Appendix A: Product Numbers, Options, and Supplies -Tables are
supplied listing part numbers for Digitals family of optical disk products,
order numbers for media and supplies, and order numbers for related
documentation.
vi

1
Drive Characteristics
This chapter provides information on the following topics:
•product features
•performance characteristics
•media characteristics
•environmental specifications
•power requirements
•service specifications
•physical characteristics
1-1

Drive Characteristics
Features of the RWZ52 Multifunction Optical Disk Drive
High Performance
•23 millisecond average seek time
•8 millisecond average latency
•1000 Kbytes/second data transfer rate for reads
•500 Kbytes/second data transfer rate for writes
•less than 3 second media load and spin-up time
•Digital Signal Processor based servo - intelligent servo system for
faster seeks and lower error rates
•split optics - lighter optical head for faster and more accurate data
access
•caching - full read and write caching for optimizing system
performance
Industry Standard Compliance
•5.25 inch industry standard media (ISO and ANSI)
•Continuous composite format
Superior Reliability
•100,000 hours MTBF (Mean Time Between Failures)
•1,200,000 MSBF (Mean Swaps Between Failure - Autochanger only)
1-2

Drive Characteristics
Performance Characteristics
650 MByte Disks
1.3 GByte Disks
Seek Times
Average Seek 23.5 ms
23.5 ms
Full Stroke 45 ms
45 ms
Short Seek(across 2.2 Mbyte) 5 ms
4 ms
Single track(track-to-track) 2 ms
2 ms
Average Latency 8.3 ms
12.5 ms
Average Access Time 31.8 ms
36 ms
Spindle Rotational Speed 3600 rpm
2400 rpm
Data Transfer Rates
Reads (max. sustained) 1.0 Mbytes/sec.
Up to 1.6
Mbytes/sec.
Writes (max. sustained) 0.5 Mbytes/sec.
Up to 0.8
Mbytes/sec.
Burst (synchronous) 5 Mbytes/sec.
5 Mbytes/sec.
Burst (asynchronous) 3 Mbytes/sec.
3 Mbytes/sec.
Buffer size 512 Kbytes
512 Kbytes
Read buffering Read aheads
Read aheads
Write buffering Immediate
Reporting Write Re-
ordering
Immediate
Reporting Write Re-
ordering
Read/Write Error Rate less than 1 per 10
14
bytes
less than 1 per 1014
bytes
Media Load/Unload Times (Autochanger)
Load (including spin up) 2.8 sec. avg.
2.3 sec. avg.
Unload (including spin down) 1.4 sec. avg.
1.4 sec. avg.
Media Load/Unload Times (Standalone)
Load (including spin up) 3.8 sec. avg.
3.3 sec. avg.
Unload (including spin down) 2.3 sec. avg.
2.3 sec. avg.
1-3

Drive Characteristics
Media Characteristics
650MByte Disks
1.3GByte Disks
Formatted Capacity
1024 Bytes/sector disks 650 Mbytes
(325/side)
1.3 Gbytes (650/side)
512 Bytes/sector disks 594 Mbytes
(297/side)
1.2 Gbytes (600/side)
Bytes per sector 10241/512
10241/512
Sector per track 31/17
31/17
Physical tracks per surface 18751
21600
Logical tracks per surface 18751
37594
Rewritable media format Continuous
Composite
conforming to
ISO/IEC 10089A;
ANSI X3.212
ECMA-184; ISO/IEC
DIS 13549 (draft)
Write-Once media format Continuous
Composite write-
once (CCW)
conforming to
ISO/IEC DIS 11560;
ANSI X3.220
ECMA-184; ISO/IEC
DIS 13549 (draft)
Media Life 30 years
30 years
Interface SCSI-2 single-ended
SCSI-2 single-ended
1Digital supports 512 byte sectors only!
1-4

Drive Characteristics
Environmental Specifications
Shock
Operating (@11 ms) 2 g, transparent
Non-Operating 25 g, no damage
Vibration (5-500Hz)
Operating 0.5 g rms
Non-Operating
Random 3 g rms
Swept-sine 1 g (0 to peak)
Altitude
Operating 7,620 m (25,000 ft.)
Non-Operating 15,300 m (50,000 ft.)
Temperature
Operating 10 degrees to 40 degrees C
Non-Operating -40 degrees to 60 degrees C
Gradient 10 degrees C/hour
Humidity
Operating 5 to 90 percent
Non-Operating 5 to 95 percent
Maximum wet bulb 29 degrees C
AC Power Requirements (Standalone)
Line Voltage 100 to 240 Vac
Line Frequency 50 to 60 Hz
Power Consumption 30 W typical, 50 W maximum
1-5

Drive Characteristics
Reliability and Service
Preventive Maintenance None required
Mean Time Between Failures 100,000 poweron hours
Cartridge load/unload cycles 1,200,000 (autochanger only)
Physical Characteristics
Drive Dimensions (Embedded)
Height 82.5 mm (3.25 in.)
Width 146 mm (5.75 in.)
Depth 203.2 mm (8 in.)
Weight(Net) 2.7 kg. (6.0 lb.)
Drive Dimensions (Standalone)
Height 146 mm (5.8 in.)
Width 174 mm (6.9 in.)
Depth 280 mm (11 in.)
Weight(Net) 4.98 kg. (11 lb.)
Weight(Shipping) 6.33 kg. (14 lb.)
1-6

2
Setting up the RWZ52
This chapter discusses the environment, hardware and procedures that
are necessary to connect a Digital Equipment Corporation RWZ52 to the
host computer:
•preparing the environment
•understanding the rear panel
•setting up the optical disk drive address
•choosing the operation mode
•connecting the drive to the host system
•preparing the host computer for use with the RWZ52
•troubleshooting
Preparing the environment
The following environmental factors should be considered for optimal
performance of the RWZ52.
Clearance requirements
A minimum of 70-80 mm (3 in.) is required behind the rear panel and in
front of the optical disk drive to allow air circulation.
Location requirements
Position the drive away from sources of particulate contamination such
as frequently-used doors and walkways, printers, stacks of supplies that
collect dust, and smoke-filled rooms.
2-1

Setting up the RWZ52
Rear panel features
Identify the following rear panel features before you connect the RWZ52
to the host system.
Figure 2-1: Rear Panel Features
1
2
3
45
0
1
The following numbers correspond to the numbers in the drawing on the
previous page.
1 SCSI ID switch Used to set the SCSI ID.
2 Operation mode
switch
Used to choose the operating mode. Refer to "To set
the operation mode" on page 0-4
3 SCSI connectors Two connectors that allow SCSI devices to be daisy-
chained. If no other SCSI device exists on the chain
after the optical drive, a terminator must be
connected to the unused connector.
4 Power connector Connection for the power cord.
5 On/Off switch Used to switch power on or off.
2-2

Setting up the RWZ52
To set the SCSI ID
Follow these steps to set the SCSI ID.
CAUTION:
Before disconnecting power to any device on the
SCSI bus, verify that the bus is inactive.
Switching off power while the SCSI bus is active
can result in data loss or indeterminate bus
states.
Step 1:Make sure the power to the drive is switched off.
Step 2:Locate the SCSI ID switch on the rear panel of the disk drive.
Refer to Rear panel features.
Step 3:Set the SCSI ID by pushing in on the button directly above or
below the address window with a small screwdriver or the point
of a pen. (A small screwdriver was shipped with the RWZ52.) The
button above the window decreases the number by one; the
button below the window increases the number by one.
NOTE:
If you change the SCSI ID, you must power cycle
the drive so that the drive recognizes the new ID.
You may also need to reboot the host system.
2-3

Setting up the RWZ52
To set the operation mode
The mode selection switch designates in which mode the RWZ52
operates.
Select 0 to operate the RWZ52 as a Digital recognized device. This is the
default mode.
Select 1 to operate the RWZ52 as a Hewlett Packard (Model 1300T)
recognized device.
Digital recommends operating the RWZ52 as a Digital recognized device.
Hewlett Packard mode is available for use with systems and applications
that do not recognize the RWZ52.
To change the operation mode, push in on the button directly above or
below the operation mode window with a small screwdriver or the point
of a pen. (A small screwdriver was shipped with the RWZ52.)The button
above the window decreases the number by one; the button below the
window increases the number by one.
NOTE:
If you change the operation mode, you must
power cycle the drive so that the drive recognizes
the new mode. You may also need to reboot the
host system.
2-4

Setting up the RWZ52
Connecting to the host computer
When you are ready to connect the RWZ52 to your host computer, note
the following cautions, then complete the steps below.
CAUTION:
•Perform a full system backup prior to
connecting the optical disk drive to the host
computer for full data protection.
•Verify that the bus is inactive before
disconnecting power to any device on the
SCSI bus. Shutting off any device while the
SCSI bus is active can result in data loss or
indeterminate bus states.
•Remove an inserted disk before the drive is
moved. Damage to the optical read/write
mechanism can occur if the drive is moved or
bumped while the power is off and a disk is
inserted.
Step 1.Make sure the power is switched off on both the computer and
the optical disk drive.
Step 2.Connect a SCSI cable from the RWZ52 to the host or to the last
peripheral which has been daisy-chained.
Step 3.Connect a SCSI terminator to the last device in the chain.
NOTE:
The length of the SCSI cable cannot exceed 6
meters, including the internal cable length of all
peripherals on the SCSI bus. The RWZ52
internal cable length is .3 m.
Step 4.Plug one end of the power cord into the AC line connector on the
back of the RWZ52 and the other end into the power outlet.
Step 5.Press in the power switch on the rear of the RWZ52 so that it is
in the "ON" position.
Step 6.Switch on the power to the host computer.
2-5

Setting up the RWZ52
NOTE:
For some host computers to recognize the optical
disk drive, the power to the disk drive must be
switched on before the power to the host
computer.
Step 7.Install the drivers appropriate to your host system, if necessary.
Troubleshooting
If you are having problems with the RWZ52, check to make sure:
•the power cord connection is tight
•the SCSI cables are connected properly
•the power switch located on the rear panel is ON
•the software drivers are loaded properly
If none of the above actions remedy the problem, contact a service
representative.
2-6

3
Using Optical Disks
The optical disks that you use in the RWZ52 are an integral part of the
storage process. This chapter provides information on the following
topics:
•choosing an optical disk
•labeling an optical disk
•maintaining an optical disk
•write-protecting an optical disk
NOTE:
For optimum performance and reliability, Digital
recommends the use of Digital-labeled optical
disks which have been fully tested for use with
Digital's optical products. These disks can be
purchased through any Digital-authorized
dealer, or ordered through Digital Direct. See
Table A-3 on page A-2 for ordering information.
3-1

Using Optical Disks
Choosing an optical disk
Optical disks are available in two capacities, 650 Mbytes and 1.3 Gbytes.
The RWZ52 can read from and write to both 650-Mbyte disks and 1.3-
Gbyte disks. However, RWZ52 users should choose 1.3 Gbyte optical
disks to receive maximum storage capacity.
Two types of optical disks are available: rewritable disks and write-once
disks. To choose which type of disk to use, consider these points:
•Rewritable optical disks - data can be repeatedly written and erased.
•Write-once optical disks - data can be written only once, and the data
cannot be altered or erased. If you have a need for data security and
audit trails, write-once disks may be your disk choice.
•Both rewritable and write-once disks come in two sector sizes:1024
bytes/sector and 512 bytes/sector. The sector size you choose depends
upon what type of operating system you are running on your
computer, and which software package you have chosen. Digital
operating systems support 512 byte sectors only. Refer to your
computer system documentation or your optical driver software
documentation to see which format is supported on your computer.
The information is probably listed under optical disk sector size or
optical disk format.
NOTE:
Do not use write-once disks in a computer system
that does not support write-once disks. Check
your computer system reference manuals to
determine the disk types that are supported.
3-2