MP7320A IDE CDR-W - Page 1
Ricoh did not stay out of the 32x recording
market and shipped a new drive with the code name "MP7320A". The drive
is an internal ATAPI model and writes at 32x CD-R, as already mentioned, re-writes
at 10x and reads at 40x. Ricoh has chosen the Z-CLV 32x writing strategy for
this model and among the main features of the drive is the "JustSpeed"
and "JustLink" technologies. We have already tested the most of the
32x recorders of the market and we expect to see whether Ricoh MP7320A will
make the difference.
- Embedded technologies
During high-speed writing in the 32x speed range,
the drive checks the type of disc in use and adjusts the writing speed to an
optimal level between 16x and 32x; It reduces disc errors such as deficiency
in writing power and servo follow error.
The mechanism controls the optimal writing speed
by media type
(1) using the ATIP information (maker name, media type pre-recorded on disc),
(2) performing test writing to the OPC area at the inner circumference of the
(3) getting the status of the servo follow check of the outer circumference
of the disc (checking of track shift due to lack of precision in cutting of
the disc itself).
A combination of the above (1), (2), and (3) enables ensured high-speed writing,
while offering support to discs for which maximum writing speed normally cannot
be obtained from the ATIP information.
MP7320A provides 32x write speed with the ZCLV (Zoned Constant
Linear Velocity) method where the write area of a disc is divided into several
areas and each area is assigned a rotation speed.The speed to be assigned increases
towards the outer area of the disc. This method enables the optimum write job
at high speed without disturbing the drive's mechanisms.
During write operation using ZCLV, the speed switches
from 16x to 20x, 24x,28x and 32x at designated speed switching points (referred
to as T1 to T4) fixed on the disc. Those switching points are set flexible when
JustSpeed is active, and during writing, each point is assigned in accordance
with the condition of the disc. That is, the drive determines the positions
of the switching points to specify areas suited for faster writing. This method
provides MP7320A with both highly reliable and fast writing capabilities.
When using high-speed media with MP7320A, the speed switching point T1 will
be located at the innermost periphery of the data area (at the end of the lead-in
area). When JustSpeed is not active, the switching points T1 to T4 are fixed.
new recorder supports 32x writing, 10x re-writing and 40x reading . MP7320A
utilizes the already known techniques that were introduced by the MP7200A series:
"Zone-CLV" recording mode and "JustSpeed" quality control mechanism.
The drive supports 4x, 8x,12x, 16x (CLV) and 16-24x, 16-32x (Z-CLV) writing
speeds. The rewriting speeds are 4x and 10x and 40x maximum (CAV) reading speed.
The cache buffer of the drive is 8MB and supports the "JustLink" buffer
underun protection. Lastly, Ricoh MP7320A does not support the Mt Rainier format.
The drive comes with newly developed modules and mechanism
to enable high-speed writing and reading.
- High-speed writing is handled by the newly developed pick-up module
incorporating a high power laser and high precision pulse control.
- The newly developed digital controller LSI controls the width
of pulse precisely,allowing for stable writing at high-speed.
- Incorporation of the high-speed rotation type spindle motor gives
stable and precise rotation during high-speed writing.
- Addition of the high-precision stepping motor to the seek algorithm
enables highly precise positioning and high speed access at 120 msec, while
improving the noise level.
- Ricoh's 32x writing speed
Ricoh MP7320A supports 32x Zone-CLV writing speed.. We used Nero CD Speed 0.85
build-in writing test in order to test the drive's writing performance:
As Nero CD Speed showed, the drive starts writing at 16x and after 2-4minutes
it jumps up to 20x. The next jump to 24x comes after 10 min from the beginning
of the disc, and after 22 min the drive increases the writing speed to 28x.
The last speed shift is the 32X at 38min. The average writing speed is around
- The package
The drive we have in our hands was not in the retail package, and the installed
firmware revision was vBP06. The same drive will be shipped in the retail packages
that will be sold in the European/Japanese/Asian/rest of the world markets.
The package will include the MP7320A CD-RW drive(ATAPI Interface), Nero Burning
Rom and InCD as attached software, 1 Ricoh High Speed CD-RW blank disc, 1 Ricoh
CD-R blank disc, a Quick start Instruction, analogue audio cable, and mounting
The front of the drive includes the "Ricoh", "JustLink", and the "32x10x40"
logos printed on it. There is also only one led, the eject button and the headphone
input jack/volume selector.
On the back of the drive there are the usual connectors (IDE interface, power),
the jumpers for setting the drive as Master/Slave/Cable Select and the SPDIF
Ricoh MP7320A was installed as Master in the secondary
IDE BUS. The drive worked in UDMA-2 mode and after boot up, it identified itself
as the "Ricoh CD-RW MP7320A". We unchecked the Auto Insert notification,
checked DMA and rebooted.
The drive was a February 2002 model with firmware revision vBP06
We used the latest version of Nero Burning ROM (188.8.131.52), InCD (3.24.3) and
CloneCD (184.108.40.206 beta1) for the recording tests. As we can see from Nero's features
screenshot we can select if "JustLink" and/or "JustSpeed" will be enabled or
not by default.