dd if=/dev/rdsk/c8t0d0p0  bs=1048576 count=9000000 | wc -c

iostat -En | grep -v "^Vendor:" |grep -v "^Media Error:" | grep -v "^Illegal Request:" | 
sed -e 's/Soft Errors:.*//' -e 's/ bytes.*//' -e 's/ *$//' -e 's/.* //' -e 's/^<//' -e 's/\n//'  | 
while read a ; do read b ; echo $a $b ; done

iostat -En | grep -v "^Vendor:" |grep -v "^Media Error:" | grep -v "^Illegal Request:" |
sed -e 's/Soft Errors:.*//' -e 's/ bytes.*//' -e 's/ *$//' -e 's/.* //' -e 's/^<//' -e 's/\n//' |
while read a ; do read b ; echo $a $b ; done |
while read a b ; do 
dd if=/dev/rdsk/${a}p0 bs=512 count=1 >/dev/null 2>/dev/null || continue
echo $b $a start
dd if=/dev/rdsk/${a}p0 bs=1048576 count=`expr $b / 1024 / 1024 + 1` | wc -c
echo $b $a end
done

printf "analyze\nsetup\nn\n\n\n\n1\n\n\n\n\n\n\n\n\nread\ny\n" | format /dev/rdsk/c0t0d0p0

iostat -en  | sed -e 's/.* //' | grep [0-9] |
while read a ; do test -e /dev/rdsk/$a && echo $a ; done | sort | uniq

iostat -en  | sed -e 's/.* //' | grep [0-9] |
while read a ; do test -e /dev/rdsk/$a && echo $a ; done | sort | uniq | 
while read a ; do printf "analyze\nsetup\nn\n\n\n\n1\n\n\n\n\n\n\n\n\nread\ny\n" | format /dev/rdsk/$a ; done

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed: read failure       30%      8358         2919728408
# 2  Short offline       Completed without error       00%      8318         -