okay so I found this info on the edirol site.... I may stick with 4gb cards, that should get me 4+ hours or record time anyway
Does the R-1 work with compact flash larger than 2GB and/or Microdrive technology? (submitted 9/29/2004)
The R-1 is compatible with FAT32 format so it is not limited by the 2GB barrier. We have tested up to 4GB with no problems. As we test larger CF cards (e.g, CF is now available in 4GB, 6GB and 8GB sizes), we will post the results.
The R-1 is not compatible with Microdrive; it consumes too much current to make it practical for this unit's design.
What CompactFlash (CF) cards are compatable with the R-1? (submitted 2/4/2005)
As of 02/04/05, the following CompactFlash cards are compatible with the R-1:
(*** = storage capacity)
SanDisk SDCFB 801
SanDisk SDCFB J60 Series
SanDisk ultra II 40x Series (SDCFH-***-903)
LEXAR Digital Film 8x Series (MCF-**X8)
LEXAR High-Speed 40x Series (CF***-40-278)
LEXAR Professional 80x Series (CF***-80-380)
(only when the AC adapter is used with the R-1.)
Renesas Technology HD28B Series
BUFFALO RCF-X Series
Hagiwara Sys-Com ZPro Series
TOSHIBA CF-NA MT Series
I/O DATA CFX 20x Series
As of 02/04/05, the following CompactFlash cards are incompatable with the R-1. Using any of the following cards may cause either the R-1's display to show "No Card", or noise to be generated during the recording:
(*** = storage capacity)
LEXAR Professional 80x Series (CF***-80-380)
(only when the battery is used with the R-1, because of too much consumption current.)
A-DATA CFC40 40x Series
BUFFALO RCF-G 45x Series
GREEN HOUSE GH-CF2GDX
Hagiwara Sys-Com V Series
Princeton Xpert 45x Series (PCFS-***)
TRANSCEND Series (all)
NOTE: All the above CF cards are of TYPE I, and no TYPE II CF card is compatible with the R-1.