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- MO-MIGA FAQ
-
- 1. What Version MO-MIGA does this FAQ refer?
-
- 2. Who distributes the MO-MIGA?
-
- 3 What Trademarks & Copyright restrictions apply?
-
- 4. What is a MO-MIGA?
-
- A. Introduction.
-
- (i) Where does this information come from?
- (ii) Who Can it be copied to?
- (iii) What are Magneto Optical Drives (MO's)?
- (iv) What are the advantages of Magneto Optical Drives?
-
- B. The MO_MIGA:
-
- (i) Can you give me an over-view?
- (ii) How much data can I store on the MO-MIGA system?
- (iii) How fast are MO-MIGA drives?
- (iv) Are there any test results available?
-
- C. What support software is available?
-
- (i) MO-MIGA Install-
- (ii) MO-MIGA Toolbox-
- (iii) MO-MIGA Exchange
- (iv) MO-MIGA Audit
- (v) MO-MIGA device
- (vi) MO-MIGA Auto-error correction
- (vii) MO-MIGA Tools
- (viii) MO-MIGA Blanker
- (ix) MO-MIGA start/stop/eject
-
- D. Is the MO-MIGA compatible with SCSI & SCSI2?
-
- E. Does the MO-MIGA permit multi-tasking?
-
- F. Who needs MO-MIGAs?
-
- G. Can I run my MO-MIGA under NetBSD?
-
- H. Can I use it on my PC compatible?
-
- I. Can I read files that have created under MSDOS on my Amiga?
-
- J. Can I read files from NetBSD under AmigaOS.
-
- K. Is an auto-change system available?
-
- L. What is the price of a MO-MIGA?
-
- M. Where can I get more information?
-
-
-
-
-
-
-
-
-
-
- 1. What Version MO-MIGA does this FAQ refer?
-
- version 2.41
-
-
- 2. Who distributes the MO-MIGA?
-
- All distribution is at the present time directly from the
- developers:
- Fourth Level Developments Ltd
- Email: david@flevel.demon.co.uk
- Fax: +44 (0) 204 844 867
-
- Future Plans: Applications are invited for distributorships
-
- 3 What Trademarks & Copyright restrictions apply?
-
-
- MO-MIGA is a registered trade mark of Fourth Level
- Developments Amiga is a registered trademark of Commodore-
- Amiga, AmigaDos,Autoconfig, A3000, A4000, CD32 and Workbench
- are trademarks of Commodore-Amiga.
-
- Fourth level developments are certified Amiga developers and
- are also Approved as Sony developers in The United Kingdom
-
-
- 4. What is a MO-MIGA?
-
-
- A. Introduction
-
- (i) Where does this information come from?
-
- The information in this section has been extracted from the manual so
- that it can be shown to people in your organisation who need
- an over-view of the MO-MIGA system.
-
- (ii) Who Can it be copied to?
-
- You are welcome to copy this section and distribute it freely
- to your colleagues and contacts. Your attention is however
- drawn to the fact that the copyright to contents of this
- manual are the property of Fourth Level Developments and any
- unauthorised distribution in whole or in part is an
- infringement of copyright.
-
- (iii) What are Magneto Optical Drives (MO's)?
-
- MO drives are like compact discs but re-writable.
- The discs come in a 5.25 in plastic cartidge but have the appearance
- of a large 3.5 in disk. The data is very secure and can be read 15 years
- after writing without any need for maintenance.
-
- Magneto Optical drives use a combinating of Magnetic and Optical effects.
- The disk is simular to other laser disks but the active area is made
- from a magnetic medium. In its raw state the medium is uniformly
- magnetised with the magnetic domain perpendicular to the plane of the disk.
-
- When you write to the disk its magnetisation can not be easily altered at
- room temperature, however when the temperature reaches a certain point
- the polarity can be flipped by an external magnetic field. So when a bit
- is to be recorded a high powered laser a beam is used to heat the material
- above the critical temperature there by allowing the reversal to take place.
-
- On reading the disk the drive has to decide which bits have been flipped
- and a low powered laser beam is used, the polarisation of the reflected
- beam is altered depending on the polarity of the bit. The polaristion is
- detected by the drive. This means that the drive can have a very high read
- speed because we are using light rather than magnetic interpretation of
- data.
-
- (iv) What are the advantages of Magneto Optical Drives?
- Magneto Optical Drives have the following major system advantages:
-
- (a) Portability
- Cartridges are compact, easily removable and transportable
- (b) Data Integrity
- Unlike conventional magnetic media they are not easily erasable by accident
- and they provide archive quality storage facilities. They are not
- easily damaged and the data can be made more secure than conventional
- hard drives because they can be securely locked away.
- (c) Speed. MO-MIGAs read much faster than standard
- IDE drives (see test results) and their write speeds are at least equal to
- if not faster)
- (d) Economy per MByte- The cost per Megabyte is much lower because
- you pay approx £100 per 1.2G cartridge(one off) and £85 per 1.2G cartridge
- in quantities of 5 or more.
-
-
- B. The MO_MIGA:
-
- (i) Can you give me an over-view?
-
- MO-MIGA 1.2GB Version 2.41 is the latest Magneto Optical Drive system for
- the Commodore Amiga from Fourth Level Developments. It is the ultimate
- drive for the professional user and comprises a specially adapted 5.25
- inch rewriteable Magneto Optical drive built by Sony supplied with full
- Amiga support software and cabling for installation in all Commodore Amiga
- range of computers equipped with a SCSI interface.
-
- There are two drive types :
-
- (a) MO-MIGA 1.2 Internal
- (b) MO-MIGA 1.2 External
-
- The double sided cartridges, (double the capacity of release
- 2.1.), provide 616MBytes of user data storage per side and
- can be changed over or new disks inserted at will.
-
- (ii) How much data can I store on the MO-MIGA system?
-
- Because you can have a many cartridges as you wish the
- MO-MIGA provides virtually infinite data storage.
-
- (iii) How fast are MO-MIGA drives?
-
- The data transfer rates have now been dramatically
- increased to 2.0 MBytes per second sustained and up to 5.0 Mbytes per
- second sychronous burst.
- (That is provided your system and its applications are fast enough
- to keep up with it!).
-
- (iv) Are there any test results available?
-
- Yes see Appendix 1
- Also see review in Amiga Computing of pre-production prototype
- which did not have the latest high speed buffered data
- transfer facility.
-
- (in June issue).
-
- C. What support software is available?
-
- MO-MIGA Software includes:
-
- (i) MO-MIGA Install- User friendly Commodore installer program which
- copies the software onto your hard drive and sets up your configuration.
-
- (ii) MO-MIGA Toolbox- Once the system is installed the user is
- provided with a tool box to format and partition cartridges
- Each cartridge, and cartridge side, can have different
- partitions which can be changed to suit the users' needs
- without resetting the Amiga or stopping other tasks from
- running.
-
- (iii) MO-MIGA Exchange provides new facilities for data exchange.
- Large scale automatic data exchanges by cartridge between
- sites and users have been catered for in this new release.
-
- MO-MIGA Exchange provides a common system which enables
- remote sites to automatically identify and implement the
- user setup requirements for each cartridge coupled with
- optional automatic dismounting upon cartridge ejection.
-
- MO-MIGA Exchange also provides a standard method for
- automatic identification of the cartridge originator by
- company name, site name, machine name and operator name.
-
- (iv)MO-MIGA Audit provides recording of audit events such as
- logons and cartridge changes. The system supervisor can set up
- different audit clasess and place certain users into these
- clasess, by doing this s/he can record the activities of users
- in a flexible manner.
-
- The MO-MIGA system enables users to increase the security
- of their data with the following options:
-
- (a) a movement audit trail,
- (b) a system of optional and multi level password controls
- to control access and writing of data.
- (c) a data access audit trail
- (d) An error audit trail which includes a record of attempts to make
- unauthorised reads or writes or to issue unauthorised
- commands.
- (e) A user transparent data encryption facility is available
- to registered users as an optional extra.
-
- Details of the security facilities and its management
- instructions and programmes are contained within a separate
- sealed package to be opened by the system administrator.
-
- (v)MO-MIGA device - Takes Amiga O/S- commands and manages the
- drive via SCSI direct commands to the MO-MIGA 1.2GB.
-
- Uses virtual data handling so all software can read/write any
- number of bytes from any bytewise disk offset. This means that
- the bytes per sector needs for multi operating system
- requirements can be met via the same device driver.
- Therefore partitions for the Amiga O/S operating at 512 Bytes
- per sector and (for example) a unix/xenix/BSD system partition at
- 1024 bytes per sector can access the same cartridge. Uses
- continuous sweep write cache and random access read cache of
- user requested size from 17k upwards. Supports all standard
- Amiga trackdisk.device commands.
-
-
- (vi) MO-MIGA Auto-error correction and defective block handling
- algorythms: For maximum compatibility with other systems data
- is written and error corrected by default in accordance with
- the lastest ISO ECMA standard defect management scheme for
- 130mm ReWriteable Optical Disks. The system is also compatible
- with the earlier ISO Standard and Sony's defect management
- system, or can operate in raw mode.
-
- (vii)MO-MIGA Tools Provides user controlled partitioning of the
- media and automatically creates and modifies mountlists and
- batch files. This feature overcomes the limitation for the
- Amiga to handle removable media that is differentially
- partitioned.
- MO-MIGA tools also supports Multi-file systems. Each
- individual media can carry its own set-up utility which
- includes assigns and all other standard user start-up
- sequences.
-
- (viii)MO-MIGA Blanker - Automatically stops the MO-MIGA's motor from
- spinning if the drive has not been used for a user-defined
- time period with auto restart when data transfer is requested.
- This prevents unnecessary wear on drive and disks.
-
- (ix) MO-MIGA start/stop/eject - These cli commands allow the user
- control over the drives motor and disk ejection.
-
- D. Is the MO-MIGA compatible with SCSI & SCSI2?
-
- Will operate under either SCSI or SCSI2.
- The system is backward compatible and will read and write current
- version lower capacity cartridges.
-
-
- E. Does the MO-MIGA permit multi-tasking?
-
- The MO-MIGA system multitasks and allows O/S-Legal programs to
- access the cartridges like a normal hard drive. MO-MIGA is
- compatible with WB2/3, this allows the user to pass cartridges
- to other Amiga computers without encountering compatibility
- problems.
-
-
- The MO-MIGA system is delivered complete with all system
- software, operating manuals, cables and straightforward
- installation guide. A voucher for 2 months immediate and free
- on-line support direct from Fourth Level Development's own
- system engineers and support team is included in the package.
- This includes access to new software releases and updates as
- they become available. Support can be extended by an annual
- subscription which includes access to new system software
- releases. As an optional extra a SCSI2 card is available.
-
-
- F. Who needs MO-MIGAs?
-
- MO-MIGA is an essential tool for any user needing mass
- data storage with fast convenient access. Graphics/video/film
- houses, bulletin board operators, company information
- providers www and ftp sites and CD ROM publishers are only a
- few examples of many ideal MO-MIGA environments.
-
- G. Can I run my MO-MIGA under NetBSD?
-
- Yes, provided your SCSI controller is supported you can use the
- MO-MIGA as either your root drive or as additional storage. If you
- need information on how to set it up under NetBSD then contact
- Fourth Level Developments who will even supply a cartridge to plug
- in and go.
-
- If you want to use the faster 1024 bytes per sector media with NetBSD
- then you will need kickstart and workbench V3.1. It is recommended
- that you stick to 1024 byte per sector media due to the significant
- increase in data storage capacity and speed.
-
- H. Can I use it on my PC compatible?
-
- Fourth Level can supply you with software to run your MO-MIGA drives
- on your PC compatible. Fairly shortly you will be able not only to
- read PC filing systems but also disks that have data stored on them
- in Amiga FFS and BFFS. The security features which are presenly
- available on the Amiga will also be available for the PC.
-
- I. Can I read files that have created under MSDOS on my Amiga?
-
- Yes you can. The ideal method is to establish the partitions which will
- be used as MSDOS partitions on the Amiga. Then mount the partitions on
- your PC and any data so stored will be readable under cross dos on the
- Amiga.
-
- J. Can I read files from NetBSD under AmigaOS.
-
- Yes, at the moment you will have to create your own mountlist from
- BFFS1.3, however a new release (V2.6) will cure this problem.
-
-
- K. Is an auto-change system available?
-
- Delivery of our auto-changer system will begin in September 1994.
- It holds 20 Cartridges and provides 24 GB on line?
-
- The price of the auto-changer will be announced during the week begining
- the 8th of August 1994.
-
- L. What is the price of a MO-MIGA
-
- End user prices are £1800 sterling + local VAT (if applicable)
- + carriage fully inclusive of all software.
-
- Up until now supplies of MO-MIGA's have been limited but full production
- has begun and ample supplies will be available to meet demand.
- Outstanding orders will be met in full by the end of August.
-
- End user support is via email and BBS direct from Fourth Level.
- Direct Ftp to Fourth Level is planned to be available from the middle
- of October 1994.
-
- M. Where can I get more information?
-
- Directly from Fourth Level Developments.
-
- email: sales@flevel.demon.co.uk (marketing)
- support@flevel.demon.co.uk (technical support)
-
- Fax +44 (0) 204 844 867
- This number will change on 1st of September 1994
- New number will be obtainable by email request.
-
- Snail mail:
-
- Before 1st of September 1994 :
-
- MO-MIGA Sales, Fourth Level Developments,
- 833,Chorley Old Rd, Doffcocker, Bolton, Greater Manchester, BL1 5SL, UK.
-
- After 1st of September 1994:
-
- MO-MIGA Sales, Fourth Level Developments,
- 31, Ashley Hill, Montpelier, Bristol, Avon, BS6 5JA, UK.
-
- End of MO-MIGA.2.41.FAQ
-
-
- APPENDIX:
-
-
- Disk speed results:
-
- These tests were done through the Amiga's FFS and so the data
- transfer rate is inclusive of SCSI,Device Software,File System
- and Operating System overheads.
-
- If speeds for specific applications are critical then we have available
- a number of special modes for fine tuning your application.
-
- One partitical example not mentioned below is pre-erased writing which
- increases the write speed by about 1/3 (Depending upon file size). This
- mode is particularly useful for batch digitising where using the MO-MIGA
- you should achieve significantly greater output than on IDE drives.
-
- These tests were done using 340K of software cache and 1MB of harware
- cache (Built into the MO-MIGA as standard).
-
- One word of caution, the way the test software package works has the
- effect of flattering the MO-MIGA seeks speeds. That is because some of
- the data being requested was already present in cache.
-
- In princial the seek time of MO drives is somewhat slower than hard
- drives because the MO has only one read/write head. However the MO makes
- up for this defiency by its much faster read time.
-
- The read speed on the first of the two tests is slighty faster because
- the write cache is enabled on the second test and it will finish emptying
- itself when the read starts thus reducing the figures slighly.
-
-
- MKSoft DiskSpeed 4.1 Copyright © 1989-91 MKSoft Development
- ------------------------------------------------------------
- CPU: 68030 OS Version: 40.68 Normal Video DMA
- Device: SPEED: Buffers: 100
- Comments: NoVerify,NoRHead,1024bps,NoWriteCache
-
- CPU Speed Rating: 1381
-
- Testing directory manipulation speed.
- File Create: 51 files/sec | CPU Available: 59%
- File Open: 53 files/sec | CPU Available: 66%
- Directory Scan: 78 files/sec | CPU Available: 78%
- File Delete: 238 files/sec | CPU Available: 31%
-
- Seek/Read: 867 seeks/sec | CPU Available: 16%
-
- Testing with a 262144 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 436906 bytes/sec | CPU Available: 79%
- Write to file: 543469 bytes/sec | CPU Available: 77%
- Read from file: 1578016 bytes/sec | CPU Available: 67%
-
- Testing with a 524288 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 572644 bytes/sec | CPU Available: 75%
- Write to file: 652099 bytes/sec | CPU Available: 73%
- Read from file: 1614187 bytes/sec | CPU Available: 67%
-
- Testing with a 1048576 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 667882 bytes/sec | CPU Available: 71%
- Write to file: 714938 bytes/sec | CPU Available: 70%
- Read from file: 1735232 bytes/sec | CPU Available: 65%
-
- Testing with a 1572864 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 694421 bytes/sec | CPU Available: 70%
- Write to file: 733269 bytes/sec | CPU Available: 69%
- Read from file: 1775241 bytes/sec | CPU Available: 64%
-
- Average CPU Available: 65% | CPU Availability index: 898
-
-
- MKSoft DiskSpeed 4.1 Copyright © 1989-91 MKSoft Development
- ------------------------------------------------------------
- CPU: 68030 OS Version: 40.68 Normal Video DMA
- Device: SPEED: Buffers: 100
- Comments: Verify,RHead,1024bps,WriteCache
-
- CPU Speed Rating: 1376
-
- Testing directory manipulation speed.
- File Create: 70 files/sec | CPU Available: 41%
- File Open: 118 files/sec | CPU Available: 32%
- Directory Scan: 171 files/sec | CPU Available: 50%
- File Delete: 212 files/sec | CPU Available: 28%
-
- Seek/Read: 837 seeks/sec | CPU Available: 18%
-
- Testing with a 262144 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 355121 bytes/sec | CPU Available: 84%
- Write to file: 364088 bytes/sec | CPU Available: 85%
- Read from file: 1561155 bytes/sec | CPU Available: 67%
-
- Testing with a 524288 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 386453 bytes/sec | CPU Available: 83%
- Write to file: 386453 bytes/sec | CPU Available: 84%
- Read from file: 1538253 bytes/sec | CPU Available: 68%
-
- Testing with a 1048576 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 397941 bytes/sec | CPU Available: 83%
- Write to file: 399457 bytes/sec | CPU Available: 84%
- Read from file: 1682899 bytes/sec | CPU Available: 66%
-
- Testing with a 1572864 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 401924 bytes/sec | CPU Available: 83%
- Write to file: 403298 bytes/sec | CPU Available: 84%
- Read from file: 1722113 bytes/sec | CPU Available: 65%
-
- Average CPU Available: 65% | CPU Availability index: 894
-
-
-
-
- MKSoft DiskSpeed 4.1 Copyright © 1989-91 MKSoft Development
- ------------------------------------------------------------
- CPU: 68030 OS Version: 40.68 Normal Video DMA
- Device: other: Buffers: 30
- Comments: Quantum 40MB,A3000 scsi,512bps
-
- This is a test done on the A3000s internal SCSI drive as
- a basis for comparison.
-
- CPU Speed Rating: 1376
-
- Testing directory manipulation speed.
- File Create: 33 files/sec | CPU Available: 72%
- File Open: 72 files/sec | CPU Available: 54%
- Directory Scan: 175 files/sec | CPU Available: 45%
- File Delete: 123 files/sec | CPU Available: 48%
-
- Seek/Read: 53 seeks/sec | CPU Available: 82%
-
- Testing with a 262144 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 339245 bytes/sec | CPU Available: 88%
- Write to file: 602994 bytes/sec | CPU Available: 91%
- Read from file: 614905 bytes/sec | CPU Available: 91%
-
- Testing with a 524288 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 435868 bytes/sec | CPU Available: 89%
- Write to file: 655360 bytes/sec | CPU Available: 91%
- Read from file: 667496 bytes/sec | CPU Available: 91%
-
- Testing with a 1048576 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 384798 bytes/sec | CPU Available: 88%
- Write to file: 683853 bytes/sec | CPU Available: 91%
- Read from file: 679422 bytes/sec | CPU Available: 91%
-
- Testing with a 1572864 byte, MEMF_FAST, LONG-aligned buffer.
- Create file: 431315 bytes/sec | CPU Available: 88%
- Write to file: 643298 bytes/sec | CPU Available: 88%
- Read from file: 658102 bytes/sec | CPU Available: 88%
-
- Average CPU Available: 81% | CPU Availability index: 1115
-