No subject
Tue Mar 11 20:20:00 PDT 2014
-R Turn on the TRIM enable flag. If enabled, and if the underlying
device supports the BIO_DELETE command, the file system
will send
a delete request to the underlying device for each freed
block.
The trim enable flag is typically set when the underlying
device
uses flash-memory as the device can use the delete command to
pre-zero or at least avoid copying blocks that have been
deleted.
-E Use TRIM to erase the file system before creating it. If used
and the underlying device supports TRIM, the device's LBAs
will
be erased using the TRIM command before the file system is
cre-
ated.
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