User manual

SANtools® S.M.A.R.T. Disk Monitor (SMARTMon-UX)120
SANTOOLS® is registered in US Patent and Trademark Office No 3,107,854 All rights reserved.
Test Option
Description
Type of Test / Methodology
Strengths
Weaknesses
overhead
once it is
accepted
by the disk.
start again.
This could
take days of
operator time
if you have
multiple
errors
towards end
of a large
disk.
-scrub
scrub test
· Reads all blocks on disk and
reports sense information
resulting from every I/O.
· Automatic retries as necessary
depending on the errors.
· Full report of non-zero sense
information and errors/retries
· Single
pass-read-
everything,
returns all
errors in
report by
block
number.
· Use it to
then
manually
reassign
sectors in
single pass
or to send
to storage
vendor for
analysis for
drive
replaceme
nt.
· No random
I/O test.
· No
non-media
tests.
· You should
combine this
test with the
-steb to
guarantee
100% testing.
Run -scrub
first and
reassign all
sectors first
so the -steb
will not stop
when it finds
first error.
-scrubq
quick scrub test
· Same as above, but it does 32
blocks at a time to finish test
much earlier.
· Does full
read, but
finishes
much
faster than
-scrub.
· Use it to
quickly find
out if there
is any
sense data
indicating
drive
needs to
be
replaced or
if further
action
required to
repair it.
· Blocks are
read in
chunks of 32,
so sense
errors are
tied to range
of blocks.
· You will have
to run the
-scrub or
-steb options
determine
exactly what
block(s) you
need to
remap.
-scrubr
random seek test
· Repositions the head in a
pseudo-random sequence until
one seek has been done for
every 16 blocks of data.on the
disk. This invokes the SEEK(10)
· This is an
important
test and
successful
sequential
· The -scrubr
& -scrubs
commands
are mutually
exclusive.