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-
- About DVD-RAM:
- --------------
-
- DVD-RAM is great if you want a cheap way to optically store information, it
- can re-write each disc block about 100,000 times with access times and data
- transfer rates compatible with DVD-ROM.
-
- Version 1 write speed is about 1385 KB/s or x9 in CD terms and Version 2
- has managed to double that to about 2770 KB/s, x18 in CD terms.
-
- DVD-RAM discs normally come in cartridges like a 3.5" floppy or a ZIP disk,
- with a handy sliding write protect tab.
-
- If you have ever had any experience with DVD discs, you will know that this
- is a good thing, however they only look cool when you get cartridges that
- are transparent.
-
- The dimensions of these cartridges including a thin protective cover is
- about the same as standard CD cases. This has the advantage of allowing
- you to store DVD-RAM discs in relatively inexpensive CD storage units.
-
- The data stored on a disc should last for around 30 years.
-
- Version 1 Single-Sided (Type 1) DVD-RAM disc = 2.6 GB (1218960 Blocks)
- Version 2 Single-Sided (Type 1) DVD-RAM disc = 4.7 GB (2295072 Blocks)
-
- Version 1 Double-Sided (Type 1) DVD-RAM disc = 5.2 GB
- Version 2 Double-Sided (Type 1) DVD-RAM disc = 9.4 GB
-
- You currently have to eject and turn over the Double-Sided discs.
-
- While the discs are in cartridges, they will not fit in a standard DVD-ROM
- player, there are supposed to be players in the future that will be able to
- read these discs.
-
- You can however get Single-Sided (Type 2) DVD-RAM discs which can be
- removed and used without a cartridge, but these may still cause problems
- with any DVD-ROM drive that doesn't understand the DVD-RAM format.
-
- These discs are not MO (Magneto-Optical), but are the direct descendant of
- the Panasonic Phase-change optical PD discs. Panasonic DVD-RAM drives can
- also read and write 650MB PD discs.
-
- It also uses virtual blocks, if a block is bad or has be re-written about
- 100,000 times so it can no longer be used, it's added to a bad block list
- and another spare block is mapped into it's place. This is done with all
- the blocks on the drive and is transparent to the computer so there are
- always the same number of good blocks available.
-
- This is probably why not all the blocks on the disc can be used by the
- filesystem, the others are spare blocks and are used as replacements when
- bad blocks are found.
-
- When all the spare blocks have been used, the disc will become read only.
-
- This shouldn't be a problem as there are lots of spare blocks. A better
- kind of filesystem for this type of drive would reduce the number of times
- each block is changed. Most filesystems are designed for magnetic storage
- and therefore use the same blocks for storing things like the bitmaps,
- these then have to be changed every time a new file is written or deleted.
-
-
- Panasonic SCSI-2 LF-D101 Version 1 DVD-RAM 2.6 drive:
- -----------------------------------------------------
-
- The following information is based on the Panasonic LF-D101 DVD-RAM 2.6,
- but most things should still apply to the 4.7 and other DVD-RAM drives.
-
- Power requirements DC +5V (1.4A Max.) DC +12V (0.7A Max.).
-
- The Panasonic LF-D101 supports most CD formats including CD-DA reading, so
- it also works well with MakeCD as a source drive.
-
- It has 2 MB buffer capacity and sustained data transfer rate of,
-
- DVD-RAM (1385 KB/s, x9 CD x1 DVD),
- DVD-ROM (2770 KB/s, x18 CD, x2 DVD),
- PD (518-1141 KB/s),
- CD-ROM (3000 KB/s Max., x20).
-
- Drive orientation can be either Horizontal or Vertical and it has a
- headphones jack with volume control.
-
- Applicable media,
-
- Read/Write (DVD-RAM, 640 MB PD),
- Read Only (DVD-ROM, DVD-R, CD-DA, CD-ROM with XA and PhotoCD Multisession,
- Video CD, CD-EXTRA, CD-R/RW MultiRead).
-
- The DVD-ROM part is RPC-2, so it will region lock after 5 changes (set by
- DVDRgn, a PC region number setting utility) to the last region set.
-
- Some drives have a hacked version of the firmware which will remove this
- fault in the drive firmware, it may be worth searching the web if this is
- important to you.
-
-
- The SCSI Interface:
- -------------------
-
- The SCSI-2 (Fast SCSI) (Supports SCAM Level 1) drive has a 50 pin SCSI-2
- internal connector (5 MB/s, 10 MB/s), stereo audio outputs, Termination and
- a set of SCSI ID jumpers.
-
- It has Active SCSI termination as with most modern SCSI-2 devices. I
- really do recommend making sure that your SCSI bus has Active termination
- at each end, especially with the A3000 internal SCSI bus.
-
-
- Panasonic E-IDE (ATAPI) LF-D111 Version 1 DVD-RAM 2.6 drive:
- ------------------------------------------------------------
-
- This is the ATAPI Interface version of the drive, I don't own one so I
- can't be sure my drivers will work correctly with a ATAPI type of drive, I
- hope they do. If you do own one of these drives and want to provide
- testing and feedback then please feel free to contact me.
-
-
- Panasonic LF-D201 Version 2 DVD-RAM 4.7 GB drives:
- --------------------------------------------------
-
- These have been available in Japan for some time, by the time you read this
- they should also hopefully be available in other parts of the world.
-
- Here are a few difference I know about between these and the old LF-D101
- drives. It now uses a tray loading system like Toshiba DVD-RAM drives,
- this may mean it can no longer be mounted vertically. The drives speed
- also seems to be double in real terms that of the old drive, for example,
- to copy a 337 MB file takes the old drive takes 13 minutes 11 seconds and
- the new drive takes only 5 minutes 14 seconds.
-
- The New double sided 9.2 GB or single sided 4.7 GB discs cannot be recorded
- or played in the old version 1 DVD-RAM drives, but because it has the same
- storage size as DVD-ROM and DVD movies, you should with the correct
- software (PC), be able to make DVD masters instead of using expensive DVD-R
- or DLT (Digital Linear Tape).
-
- Players and drives that say they are DVD-Multi should be able read DVD-RAM.
-
- Please Note, These DVD-RAM masters will probably not be able to be played
- in most of the current generation of DVD-ROM drives and home DVD movie
- players, but because the DVD-ROM drive modifications needed to play these
- discs is only slight (maybe even just the firmware), this could all be
- about to change with future player and drives.
-
- This could at last mean a storage system you can use on your computer and
- in your living room.
-
- So to summarise, if you are thinking of getting the old drive, think again,
- unless you can get one really cheap, this is the only version to get !
-
-
- What is RPC-1 and RPC-2 with certain drives ?:
- ----------------------------------------------
-
- RPC-1 : The region code is managed by your DVD software.
-
- RPC-2 : The region code is managed by your DVD drive firmware.
-
- DVD discs have built in region codes (1 to 8 and 0 for no code) which
- represents the country where that disc is allowed to be sold and used, US
- DVD discs should only play in US players because of the region number, 1
- for the US, 2 for the UK and Japan etc.
-
- Before the year 2000, bare DVD-ROM drives could be sold RPC-1 (Region
- Protection Code 1) which meant a RPC-1 drive could read any DVD disc from
- anywhere in the world.
-
- The region code was set in the video player hardware (video card) or
- software player program, this was of course widely hacked to remove the
- region code.
-
- After 1999, all bare drives have to be RPC-2, this locks the region in the
- drive either by allowing it to be changed 'X' number of times (normally 5)
- or by locking after to the last 'X' number of DVD discs are loaded.
-
- Their now exists hacked drive firmware on the Web, so that some of these
- RPC-2 drives can be made region free by simply being flash upgraded. The
- drive manufactures are still fighting back, with things like stopping the
- same version of firmware from being re-flashed.
-
-
- Who manufacturers DVD-RAM drives and media ?:
- ---------------------------------------------
-
- Remember, this list is just based on my current knowledge (things can
- change each day).
-
- If you need a RPC-1 DVD-RAM drive, it may be better to consider a DVD-RAM
- drive from a manufacturer marked with a hack (*). Try to find and download
- the hack for that model from the Web before buying the drive.
-
- Drives marked with a hack (*) should have some kind of region free firmware
- available on the Web.
-
-
- SCSI 2.6 GB Model Write/Read/CD Buffer *=Hack!
- ----------- ----- ------------- ------ -------
- Panasonic LF-D100/101/103 1x / 2x / 20x 2 Mb RPC-2(*)
-
- Hitachi GF-1050/1055 1x / 2x / 8x 1 Mb RPC-2
-
- Toshiba SD-W1101 1x / 2x / 16x 256 kb RPC-1
- Toshiba SD-W1111 1x / 2x / 16x 2 Mb RPC-2(*)
-
- Aopen
- (Panasonic) DVD-520S 1x / 2x / 20x 2 Mb RPC-2
-
- Creative Labs
- (Panasonic) DVD-RAM 1220S 1x / 2x / 20x 2 Mb RPC-2
- (Toshiba) DVD-RAM 1216S 1x / 2x / 16x 2 Mb RPC-2
-
- ATAPI 2.6 GB Model Write/Read/CD Buffer *=Hack!
- ----------- ----- ------------- ------ -------
- Panasonic LF-D110/111 1x / 2x / 20x 2 Mb RPC-2(*)
- Hitachi GF-1000 1x / 2x / 20x 1 Mb RPC-2
-
-
- SCSI 4.7 GB Model Write/Read/CD Buffer *=Hack!
- ----------- ----- ------------- ------ -------
- Hitachi GF-2050/2055 2x / 6x / 24x 2 Mb RPC-2
- Panasonic LF-D200/201 2x / -x / -x - Mb RPC-2(*?)
-
-
- ATAPI 4.7 GB Model Write/Read/CD Buffer *=Hack!
- ------------ ----- ------------- ------ -------
- Panasonic LF-D210/211A 2x / -x / -x - Mb RPC-2(*?)
- Hitachi GF-2000 2x / 6x / 24x 2 Mb RPC-2
- Toshiba SD-W2002 2x / 6x / 24x 8 Mb RPC-2
-
- 4.7 GB is about the same size as a standard single layer DVD-ROM (or film).
-
-
- DVD-RAM compatible DVD-ROM:
- ---------------------------
-
- These drives should be read compatible with 2.6 GB Type 2 discs.
-
- 2.6 GB Model DVD / CD *=Hack!
- ------ ----- -------- -------
- Panasonic/Compaq SR-8583 5x / 32x RPC-2(*)
- SR-8583 (not with firmware 0W01 and 0Y01)
- Panasonic/Compaq SR-8584A 6x / 32x RPC-1/2(*)
- Panasonic SR-8585 8x / 40x RPC-2(*)
- Panasonic (laptop) SR-8174 6x / 24x RPC-2(*)
- Panasonic (laptop) SR-8175 8x / 24x RPC-2
- Creative (Panasonic) DVD-5240E 5x / 32x RPC-2(*)
- Creative (Panasonic) DVD-5241E 5x / 32x RPC-1
- Creative (Panasonic) DVD-6630E 6x / 32x RPC-1/2(*)
- Creative (Panasonic) DVD-8400E 8x / 40x RPC-1/2(*)
- Hitachi GD-5000 8x / 40x RPC-2(*)
-
- These drives should be read compatible with 4.7 GB Type 2 discs.
-
- 4.7 GB Model DVD / CD *=Hack!
- ------ ----- -------- -------
- Hitachi GD-7000 8x / 40x RPC-2(*)
- Hitachi GD-7500 12x / 40x RPC-2(*)
-
- Future Toshiba drives may also support DVD-RAM reading as should any drives
- which support the DVD-Multi standard, confirm the specifications at the
- time of purchase.
-