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Disk mode information CD-R/RW disks on the OASYS: UDF and packet-writing
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CD-R/RW disks on the OASYS: UDF and packet-writing
The OASYS lets you use CD-R/RW disks like you
would a floppy disk or a removable hard disk. You can
save individual files to a disk, over-write them, add
new folders, and so on, without needing to “burn” an
entire disk at once.
It does so by using UDF (Universal Disk Format)
version 1.5 and packet writing, as described below, as
its native CD-R/RW data format. Note that there are
some considerations when reading these disks on
computers or other equipment, as described under
“Reading OASYS CDs on other devices,” below.
You can also create audio CDs, which use the standard
audio CD format (CD-DA). For more information, see
“1–1: Make Audio CD” on page 698, and “Creating
audio CDs” on page 175 of the Operation Guide.
About packet writing
Packet writing is a method of dividing data into small
units, called “packets.”This makes it possible to write
individual files to CD-R/RW disks, as opposed to
writing an entire disk at once.
Compatible media
Before writing data to a CD-R/RW disk, you must
format the disk using the OASYS.
CD-R media
• 650 MB and 700 MB CD-R media (up to 48
×
write
speed)
CD-RW media
• 650 MB and 700 MB CD-RW media (up to 4
×
/10
×
write speeds)
Formatting
Before using CD-R/RW disks, you need to format
them. To do so, insert the blank or previously-
formatted media into the drive, go to the Disk Utility
page, and select the
Format
menu command.
When writing to the internal CD-R/RW drive, do
not subject the OASYS to vibration or physical
shock, since this may cause errors.
Cautions when formatting
CD-R media
Quick Format
takes less than a minute.
Full Format
applies only to CD-RW media, and so it
can’t be selected for CD-R disks.
Re-formatting:
Data that has been written to CD-R
cannot be erased as it can on a floppy disk. This means
that re-formatting previously-formatted media will not
increase the free space; instead, approximately 20 MB
of space will be used to add a new session.
CD-RW media
Quick Format:
Use this option to erase the contents of
a previously formatted CD-RW. This cannot be used
with blank CD-RW media. It takes about two minutes
to complete.
Full Format:
Use this option to format blank media, or
media which has been formatted as a non-UDF disk.
You can also use
Full Format
if writing errors occur
frequently when writing to the disk.
Full Format
takes about fifteen minutes for 10x CD-
RW media, and about thirty minutes for 4x CD-RW
media. (Depending on the condition of the disk, it may
take substantially longer.)
Formatting takes up some of the space on the disk, so
that 650 MB/700 MB media will have approximately
530 MB/570 MB of available space, respectively.
Re-formatting:
Like floppy disks and hard drives, CD-
RW disks can be formatted to erase any previous
contents, and re-formatting frees up space on the disk.
Deleting and updating files
CD-R media
With CD-R media, deleting a file merely hides it from
view; the file still exists on the disk, and no space is
freed by the deletion.
Similarly, when you save a new version of a file, the
previous version is hidden but not actually removed
from the disk. Each version of the file will take up
additional space on the disk.
CD-RW media
CD-RW disks work the same way as hard drives.
Deleting files frees up space on the disk, and saving a
new version of a file (with the same name as the
previous one) will overwrite the original file.
Writing to CD media may take time
Writing to a CD-R/RW will generally be slower than
writing to a hard disk. The time it takes to write will
depend on the speed of the CD-R/RW drive, and on
the writing speed supported by the media.
Reading OASYS CDs on other devices
CD-R media
You can read native OASYS CDs, in UDF packet-
writing format, on computers with packet-writing
software installed.
For maximum compatibility, you can convert CD-Rs
(not CD-RWs) into ISO9660. This makes it possible for
the data to be read by other KORG devices that
support the ISO9660 format, or by computers which do
not have packet writing software. For more
information, see “Convert to ISO9660 Format” on
page 723.
Note: This conversion adds ISO9660 session data, which consumes approximately 20 MB of space.