MODEL- BW-RU101           VENDOR- SONY STORAGE
 
FEATURES- Professional Disc for DATA
       External USB 2.0 23GB Optical Disc Drive.
       Based on blue laser technology, the Professional Disc for DATA media 
        stores up to 23GB of native capacity per rewritable or write-once, 
        read-many (WORM) disc, while the drive sustains a maximum native 
        transfer rate of 11 MB/sec, delivering an advanced optical storage 
        and archiving solution for professional data-intensive 
        applications. 
       The Professional Disc for DATA drive and media feature a durable, 
        airtight structure to prevent dust particles from coming in contact 
        with the drive mechanism and disc surface, increasing durability 
        and reliability for critical data storage applications. 
       This external drive incorporates a USB 2.0 interface for easy
        integration into external subsystems, high-end workstations, 
        servers and automated libraries commonly used for storage and long-
        term archival purposes. 
* Dustproof design
   Dust is the principal enemy of optical discs. That is why the BW-RU101 
   internal drive has been designed to be completely airtight; dust is 
   prevented from entering the case via either the mounting screw holes or 
   the space between the top and bottom covers. The main entry point for
   dust is the shutter, but a dual-shutter mechanism has been adopted to 
   ensure an airtight enclosure even with the media inside the drive. In 
   addition, this drive is maintenance-free: an internal brush mechanism 
   ensures periodic, automatic cleaning of the pickup lens to achieve the 
   highest level of reliability. 
* Automatic CAV/CLV selection
   "Professional Disc for DATA" drives support both CAV (constant angular 
   velocity) and CLV (constant linear velocity) transfer modes when reading 
   and writing data. In CAV mode the disc rotates at a constant speed, 
   meaning that the transfer rate slows as the pickup approaches the center 
   of the disc, but seek operations are fast (110ms average). In CLV mode 
   the speed of the pickup is constant, so although seek operations take 
   longer, the maximum transfer rate of 11MB/s is maintained at all times. 
   The drive firmware automatically selects the Optimum mode to ensure the 
   best overall performance. For example, if accessing a series of 
   relatively small text files, CAV is used for fast seek times, but when 
   reading large music or video files, CLV is employed to ensure the 
   maximum transfer rate. The factory setting ensures that the drive 
   automatically selects the optimum transfer mode. But if necessary the 
   user can select the transfer mode: DIP switches allow selection of 
   either CAV or Optimum mode, while any one of the three modes (CAV, CLV 
   or Optimum) can be specified by a mode select command.
* High-capacity cache
   The drive is equipped with a 16MB cache, much larger than the 2MB cache 
   of DVD-RW drives or even the 8MB cache of MO drives. This effectively 
   reduces the load on the CPU when writing to disc, and improves 
   performance when accessing data thanks to its enhanced capacity to read 
   ahead. Error recovery is also improved: the large cache minimizes any 
   impact on performance. 
* Low Power Consumption
   When there is no disc access for a certain length of time, the drive 
   starts shutting down components and circuits to save power. This follows 
   a phased schedule (see table) that parks the optical pickup (OP), 
   engages idle mode, cuts spindle power and eventually switches off the 
   cooling fan. Power consumption is cut by approximately 50%, but there is 
   more to it than that: in fan-off mode the drive produces less heat and 
   attracts less dust since there are no moving parts. The duration of each 
   phase in the sleep sequence can be adjusted using mode select commands 
   to tailor performance for different applications. 
 
  -- SPECIFICATIONs ------------------------------------
INTERFACE/BUS- USB 2.0
DISC TYPE    - Rewritable (PDDRW23), Write-once (PDDWO23)
CAPACITY     - 23.2 GB
TRANSFER RATE- Sustained Read : 11 MB/s (CLV), 4.5 - 11 MB/s (CAV) 
               Sustained Write:  9 MB/s (CLV), 4.5 -  9 MB/s (CAV) 
               Burst          : 480 MB/s (synchronous) (max) 
LOGICAL SECTOR SIZE-
               2,048 bytes (512-byte sector size can be chosen by using 
                 mode select command)
SEEK TIME (CAV)-
               Full Seek: 200 ms 
               1/3 Seek : 110 ms 
LOAD/EJECT TIME-
               6.0 sec/3.5 sec 
BUFFER MEMORY- 16 MB 
ENVIRONMENTAL- Operating Temperature: +5 ~ 45 degrees C
               Operating Humidity   : 10 ~ 90 % RH (non-condensing) 
               Storage Temperature  : -30 ~ 60 degrees C
               Storage Humidity     :  5 ~ 95% (non-condensing) 
MTBF - 100,000 hours 
POWER- AC 100-240V +/- 10%, 50/60Hz +/- 5%; Consumption 30W (avg)
SIZE - 7.97"w x 2.36"h x 12.3"d               WT.- 9.95 lbs.
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                                        e-mail: tape.support@am.sony.com