Canon EOS-1D Mark IV - Manual (Page 51)

Before You Start
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When the card is formatted or data is erased, oniy the fiie management
information is changed. The actuai data is not completeiy erased. Be aware
of this when seliing or discarding the card. When discarding the card,
execute iow-levei formatting or destroy the card physically to prevent the
data from being ieaked.
The card capacity displayed on the card format screen might be smaiier
than the capacity indicated on the card
About Low-level Formatting
When [ID] is selected, low-level formatting is possible. If the writing
speed to the SD card is slower than usual or if you want to completely
erase the data in the SD card, checkmark [Low level format] and
format the card.
Press the < m> button.
• In step 3 on the preceding page,
press the < m> button.
► The [Low level format] option will be
checkmarked <\/>
• With <\/> displayed, select [OK] to
start the low-level formatting.
Fonrn cardZ
All dm will bs tel!
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• Since low-level formatting will erase all recordable sectors in the SD
card, the formatting will take longer than normal formatting.
• You can stop the low-level formatting by selecting [Cancel]. Even in this
case, normal formatting will have been completed and you can use the
SD card as usual.
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