Using the $2$ x $300$MB hard disks, partition each disk as single partition and then create RAID$1$ as $/$dev$/$md$1$ and create

xfs file system on it and mount it on $/$raid$1$ directory.

$4.$ Assign user and group ownership to yourself for $/$raid$1,$ create files r$1$test$1$ by redirecting the output of man mdadm to

r$1$test$1,$ similarly for r$1$test$2$ using man gdisk and r$1$test$3$ using man useradd $/$raid$1$ without using sudo,

$5.$ Simulate any one of the disks in $/$dev$/$md$1$ array for failure, remove it and replace it with the unused $300$M

disk.Following SCREENSHOTS required at each stage given below.

Aftersetting $1$ disk as failed After failed disk removed After replacing failed disk

$$ cat $/$proc$/$mdstat

$$ mdadm $-$D $/$dev$/$md$1$

$$ mdadm $-$E $/$dev$/$md$1$ disk$\_$failed

$$ ls $-$ld $/$raid$1$;ls $-$l $/$raid$1$;df $-$Th $/$raid

$$ cat $/$proc$/$mdstat

$$ mdadm $-$D $/$dev$/$md$1$

$$ mdadm $-$E $/$dev$/$md$1$ any$\_$arraydisk

$$ ls $-$ld $/$raid$1$;ls $-$l $/$raid$1$;df $-$Th $/$raid$1$

$$ cat $/$proc$/$mdstat

$$ mdadm $-$D $/$dev$/$md$1$

$$ mdadm $-$E $/$dev$/$md$1$ disk$\_$replaced

$$ ls $-$ld $/$raid$1$;ls $-$l $/$raid$1$;df $-$Th $/$raid$1$

$6.$ Check the $/$raid$1$ directory for the presence of the files you have created earlier

$7.$ Edit file r$1$test$1$ to check for redundancy.