Corvus systems Mirror Server User manual

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* CORVUS SYSTEMS
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MIRROR SERVER
MANAGER'S GUIDE

LIMITED WARRANTY
Corvus warrants its hardware products against defects in materials and
workmanship for a period of 180 days from the date of purchase from
any authorized Corvus Systems dealer. If Corvus receives notice of
such defects during the warranty period, Corvus will, at its option,
either repair or replace the hardware products which prove to be
defective. Repairs will be performed and defective parts replaced
with either new or reconditioned parts.
Corvus software and firmware products which are designed by Corvus for
use with a hardware product, when properly installed on that hardware
product, are warranted not to fail to execute their programming
instructions due to defects in materials and workmanship for a period
of 180 days. If Corvus receives notice of such defects during the
warranty period, Corvus does not warrant that the operation of the
software, firmware or hardware shall be uninterrupted or error free.
Limited Warranty service may be obtained by delivering the product
during the 180 day warranty period to Corvus Systems with proof of
purchase date. YOU MUST CONTACT CORVUS CUSTOMER SERVICE TO OBTAIN A
"RETURN AUTHORIZATION CODE" PRIOR TO RETURNING THE PRODUCT. THE RAC
(RETURN AUTHORIZATION CODE) NUMBER ISSUED BY CORVUS CUSTOMER SERVICE
MUST APPEAR ON THE EXTERIOR OF THE SHIPPING CONTAINER. ONLY ORIGINAL
OR EQUIVALENT SHIPPING MATERIALS MUST BE USED. If this product is
delivered by mail, you agree to insure the product or assume the risk
of loss or damage in transit, to prepay shipping charges to the
warranty service location and to use the original shipping container.
Contact Corvus systems or write to Corvus customer Service, 2100
Corvus Drive, San Jose, CA, 95124 prior to shipping equipment.
ALL EXPRESS AND IMPLIED WARRANTIES FOR THIS PRODUCT, INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
ARE LIMITED IN DURATION TO A PERIOD OF 180 DAYS FROM DATE OF PURCHASE,
AND NO WARRANTIES, WHETHER EXPRESS OR IMPLIED, WILL APPLY AFTER THIS
PERIOD. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED
WARRANTY LASTS, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.
IF THIS PRODUCT IS NOT IN GOOD WORKING ORDER AS WARRANTED ABOVE, YOUR
SOLE REMEDY SHALL BE REPAIR OR REPLACEMENT AS PROVIDED ABOVE. IN NO
EVENT WILL CORVUS SYSTEMS BE LIABLE TO YOU FOR ANY DAMAGES, INCLUDING
ANY LOST PROFITS, LOST SAVINGS OR OTHER INCIDENTAL OR CONSEQUENTIAL
DAMAGES ARISING OUT OF THE USE OF OR INABILITY TO USE SUCH PRODUCT,
EVEN IF CORVUS SYSTEMS OR AN AUTHORIZED CORVUS SYSTEMS DEALER HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM BY ANY
OTHER PARTY.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS, SO THE ABOVE LIMITATIONS
OR EXCLUSIONS MAY NOT APPLY TO YOU.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE
OTHER RIGHTS WHICH MAY VARY FROM STATE TO STATE.

Part Number:
Release Date:
Revision: A
7100-06601-01
September 1984
MIRROR SERVER
MANAGER'S GUIDE

FCC WARNING
This equipment has been tested with a Class A computing
device and has been found to comply with Part 15 of FCC
Rules. Operation in a residential area may cause
unacceptable interference to radio and TV reception
requiring the operator to take whatever steps are
necessary to correct the interference.
NOTICE
Corvus systems, Inc. reserves the right to make changes in the
product described in this manual at any time without notice.
Revised manuals will be published as needed and may be purchased
from authorized Corvus Systems dealers.
This manual is copyrighted. All rights reserved. This
document may not, in whole, or in part be copied, photocopied,
reproduced, translated or reduced to any electronic medium or
machine readable form without prior consent in writing from:
Corvus Systems, Inc.
2100 Corvus Drive
San Jose, CA. 95124
Telephone: {408) 559-7000
TELEX: 278976
{c)
Copyright 1984 by Corvus Systems, Inc. All rights reserved.
IBM {R) is a trademark of International Business Machines, Corp.
MS(TM)-DOS is a trademark of Microsoft Corporation.
CP/M (R) is a trademark of Digital Research Inc.
Corvus Systems (TM), Corvus Concept (TM), Transporter (TM),
Omninet (TM), LogiCalc (TM), EdWord (TM), The Bank (TM),
Bank
Tape (TM), OmniDrive (TM), ISYS (TM), Constellation (R),
and Mirror (R) are trademarks of Corvus Systems, Inc.
Mirror (R), U.S. Patent #4,380,047 International patents pending
Corvus Concept (TM), patent pending
Omninet {TM), patent pending

Mirror Server Manaqer Guide
TABLB 01'
CONTENTS
iii
Gettinq Started • • •• • • •• • • • •• • • • •• • • •• • • •• • • • • •• • • • •• • • • • • l
How This Guide is Orqanized ••••••••••••••••••••••••••• l
Hardware and Software Required •••••••••••••••••••••••• 2
Preparing the VCR • • • •• • • • •• • • •• • • • •• • • • • •• • • •• • • • • • • •• 4
Usaqe • • • • •• • • • • •• • • •• • • •• • • • •• • • • •• • • • •• • • • • • •• • • • • •• • 5
Chapter 1: Installinq the Hardware and Software ••••••••• 7
Installinq a Network Tap Box 7
connectinq the Mirror Server to the Network ••••••••••• 10
Connectinq the VCR to the Mirror server ••••••••••••••• 14
Copyinq the Software to the Drive ••••••••••••••••••••• 16
Copyinq the Boot Diskette ••••••••••••••••••••••••••••• 19
Chapter z: overview of Network Backup ••••••••••••••••••• 21
Chapter 31 Creatinq a Transfer Tabla •••••••••••••••••••• 25
Building a Table •••••••••••••••••••••••••••••••••••••• 25
Drive Transfer • • • •• • •• • • • • •• • •• • • •• • • • •• • • • • • •• • • • • 27
Volume Transfer • • • •• • • •• • • •• • • • •• • • • •• • • • • • • •• • • • • • 28
Block Transfer • • • • •• • • •• • • •• • • • •• • • • •• • • • • • •• • • • • • • 28
Listinq a Table • • • • •• • •• • • • •• • • • •• • •• • • • • • •• • • • • • • • •• • 29
Savinq a Table • • •• • • • •• • • •• • • •• • • • •• • • • •• • • • • •• • • • • • •• 30
Table of Contents
7100-05279

Mirror Server Manager Guide iv
Chapter 4: Backing Up Data •••••••••••••••••••••••••••.•• 33
Backing Up to a Tape ..••••••.•.••••••..••••••••••••••• 35
Verifying a Backup . • • • • . . • . • • • • • • • • • • • • • • • • • • • • • • • • • • • 39
Chapter s: Restoring Data • • • • • • • . • • • • • • • • • • • • • • • . • • • • • • • 45
Chapter 6: Identifying a Tape ••••••.•••••••••••••••••••• 51
Identifying a Tape Image •••••••••••••••••••••••••••••• 51
Listing a Tape Directory • • • • • • • • • • • • • • • • • • . • • • • • . • • . • • 55
Chapter 7: A Sample Session • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 59
Enter the Mirror Server Program ••••••.•••••••••••••••• 59
From Constellation II • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 59
From the Bootable Diskette •••••••••••••.••••.•••••• 61
Build the Transfer Table • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 62
List the Transfer Table • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 66
save the Transfer Table . • • • • • • • • • • • • • • • • • • • • • • • • • . • • • . 67
Back Up the Data • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 68
Verify the Backup ••••••••••••••••••••••••••••••••••••• 73
Identify the Image •••••••••••••••••••••.••••••••.••••. 76
Restore the Data •••••••••••••••••••••••••••••••••••••• 80
Table of contents
7100-05279

Mirror Server Kanaqer Guide v
Appendiz A1 Error Kessaqes •••••••••••••••••••••••••••••• 85
Disk Read Errors 85
Recovered Errors
Tape Errors .......................•.........•......•..
87
87
Miscellaneous Problems •••••••••••••••••••••••••••••••• 91
App-diz B1 Chanqinq the Fuse ••••••••••••••••••••••••••• 93
In4ez ..•....••.•...•.....•...•••...•....•.•...••.......•. 97
Gettinq Started
7100-06601-01

Mirror Server Manaqer Guide
GETTING
STARTED
The Mirror (R) Server backup interface system provides an
efficient and inexpensive way to back up information stored
on Corvus disk systems. This quide explains how to use the
Mirror Server and a video cassette recorder (VCR) to back up
and restore data.
The Mirror Server can back up or restore a sinqle volume, an
entire disk system or a specified number of blocks on a disk
system.
When backinq up data, a copy of the information on the drive
is transferred to the VCR tape. Once on the VCR tape, the
data copy is considered an imaqe. An imaqe is a copy of a
sinqle volume, an entire disk system or a specific number of
blocks. An imaqe resides only on the VCR tape.
l
When restorinq data, a copy of the information on the VCR
tape is transferred to the destination volume, drive, or area
on the disk.
The Mirror Server is a network device--it must be connected
to an Omninet (TM) local area network. Chapter l,
"Installinq the Hardware and Software," explains how to
connect the Mirror Server to your network and the VCR.
HOW THIS GUIDE IS ORGANIZED
This quide is divided into seven chapters and two
appendices.
Chapter l explains how to install the Mirror Server
hardware and software.
Chapter 2 describes the basics of network backup,
includinq some definitions and qeneral information.
Chapter 3 explains the transfer table, includinq how to
Gettinq Started 7100-06601-0l

Mirror Server Manager Guide
build a table, save a table, and list a table.
Chapter 4 explains how to back up data from a drive.
This chapter also explains how to verify the results of
the backup.
Chapter 5 explains how to restore data from the VCR tape
to a drive.
2
Chapter 6 explains the two ways to indentify the contents
of a VCR tape, the list tape directory option and the
identify tape image option.
Chapter 7 shows in a step-by-step sample session how to
back up and restore information.
Appendix A explains several error messages and the
procedures to correct the errors.
Appendix B explains how to change the fuse on the Mirror
Server.
HARDWARE AND SOFTWARB RBQUJ:RBD
Only the system manager should use the Mirror Server. To
install the Mirror Server, the system manager will need
the following equipment: a video cassette recorder, a
Mirror Server, and a computer connected to an Omninet
network that is running Constellation II software.
To add the Mirror Server to an Omninet network, use these
items:
o Mirror Server
o Power cord
o Network tap box
o Tap cable
o Three-foot video cable
Getting Started 7100-06601-0l