11/17/2007
Data Test Program (dt)
14
Generic DT Features
nAssortment of data patterns (pattern= or pf= options).
nControl of I/O request sizes (min=, max=, incr=, bs= opts).
nChecks for buffer overwrites (pad bytes w/inverted pattern).
nAllows misaligned data buffers (align= option vs. page aligned).
nAllows block number encoding (enable=lbdata or pattern=iot).
uLBA’s are 32-bits
ulbdata big-endian LBA’s
uiot encodes little-endian LBA’s
nReports performance statistics (total stats after test complete).
nVariable I/O request sizes (incr=variable option).
nVarious flags to control program behavior (debug, verify, etc).
nIntuitive numeric and runtime string input formats.
nFlags to control test operation (flags=direct,excl,sync etc).
nNo I/O progress options to detect and report slow or no I/O.