can be used to gauge hard drive speed over the entire
platter, without reading everything. Both x/y can
include k/m/g suffix.
+ iolog=x Open and read io pattern from file 'x'. The file must
+ contain one io action per line in the following format:
+ rw, offset, length
+ where with rw=0/1 for read/write, and the offset
+ and length entries being in bytes.
Examples using a job file