JOBO GIGA VU SONIC Manual page 21

Verify Card:
After the verifying memory card function is selected, for each file copied, CRC
checksum of the file will be recorded (multiple CRC checksums will be recorded for
large files). Whenever all files in a folder are copied, the system will reread the
memory card, recalculate the CRC checksum of each file and compare it with the
checksum during copying to ascertain the copying operation is fully correct.
When the function is started, it will:
• detect the data errors on the memory card.
•
influence copying speed, extent of which depends on the reading speed of the
memory card.
Changing Speed mode:
Under <Backup> on the main menu, select <Backup Setup>[ <Speed>.
Hyper speed:
Hyper speed uses slow operating speed of the hard drive, and renews copying
progress whenever a file is copied.
When the function is started, it:
• will reach an average copying speed of about 16Mbytes/s.
• may not reach an average copying speed of about 16Mbytes/s when a large
quantity of small-sized files are copied.
UDMA66 speed:
UDMA66 speed uses quick operating speed of the hard drive and, in order to speed
up, renews copying progress at an interval of 1 second.
When the function is started, it:
• will reach an average copying speed of 30~40Mbytes/s.
• cannot reach the maximum average speed when backing up CF memory card
of non-UDMA specification.
• cannot reach the maximum average speed when function of verifying hard
drive, verifying memory card or preview of copy is started.
•
cannot reach the maximum average speed when battery electricity is small or
ambient temperature is low. It may lead to failure of copying in serious
situation. In this case, charge the battery or retry it by changing into "Hyper
Speed".
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