Raw data is at /mnt/disk*/hadoop/data/
The test db data is at /mnt/disk*/shiva-tabletserver/data

In test.sh, command to make the two data dir on tpcds15 not accessible:
pdsh -w tpcds[15] "chmod -rw -R /mnt/disk4/hadoop/data"
pdsh -w tpcds[15] "chmod -rw -R /mnt/disk4/shiva-tabletserver/data"

Command to capture the status of a durable medium:
pdsh -w tpcds[15] "ls -l /mnt/disk4/hadoop " >> ../logs/Disk_Status_Failed.out
pdsh -w tpcds[15] "ls -l /mnt/disk4/shiva-tabletserver " >> ../logs/Disk_Status_Failed.out
