LaCie Portable DVD±RW User Manual

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LaCie Portable DVD±RW User Manual Manual pdf 18 page image

LaCie Portable DVD±RW • Design by sam HecHt Helpful Technical InformationUser Manual page 184.2. DVD±RW Writing MethodsDisc at Once (DAO) – A DVD writing process in which the entireDVD is recorded in one session, and data cannot be added after therecording is finished. Differs from the CD-R DAO method becausethe lead-in, data area and lead-out areas are all written sequen-tially.Session at Once (SAO) – A writing process which is similar to DAO,where all of the information is written in one session, but SAO allowsfor the ability to begin another session and record at a later time.This mode allows for greater control of the recording process thanPacket Writing (PW) or TAO, and more disc space can be utilizedbecause there is no need for gaps between tracks.Incremental Recording (IR) – A writing process that is similar to theSession at Once (SAO) CDR writing method; files may be addeddirectly to the DVD-R disc one recording at a time, instead of record-ing the files to a hard drive before writing the disc. The minimumrecorded size, though, must be at least 32KB (even if the file to berecorded is smaller than that), and capacities and write speeds aredecreased due to the overhead of combined lead-in/out areas anddata. Also, the disc must be finalized before it may be played backby a drive other than the drive recording the disc.Multi-Border Recording (MBR) – A writing process that is very similarto IR, MBR allows you to make an IR disc and then play the discback on a device that recognizes this type of recording method. MBRcreates a very short boundary zone around a recording session so acompatible player or DVD-ROM drive does not attempt to play be-yond the border of the recorded area, instead allowing the unfinal-ized disc to be read by a player that supports this recording method.Restricted Overwriting (RO) – With this method, if a disc has alreadybeen written to, new data segments can be randomly inserted any-where within the recorded boundary. New data, however, can onlybe added to an area of the disc that has already been recorded overand from the point where the last session was stopped.Packet Writing (PW) – A drag-and-drop writing process writing pro-cess that is very useful for data backup. Buffer underrun* is impos-sible in this mode, because the data is written in “packets” of a fewKBs. Packet Writing is a CPU-intensive process because it constantlychecks the available space on the disc.* Buffer Underrun – The recording of a disc is a system-intensive ap-plication, and the rewritable drive needs a constant stream of data.A buffer underrun occurs when the stream of data to the rewritabledrive is not fast enough to keep the rewritable drive’s buffer full,causing the an error in the recording process. If this problem occursoften, turn down the recording speed.Table 02 - DVD±RW Writing MethodsDAO SAO IR MBR RO PWCD ✔ ✔ ✔DVD ✔ ✔ ✔ ✔