Suppose that a disk has storage capacity of 1TB and a block size of 4096 bytes. We have a table with 100,000 records each record has a size of 2050 bytes. Answer these questions:

1. What is the total capacity of RAID 0 with 10 drives?

2. What is the total capacity of RAID 5 with 10 drives?

3. How many blocks are needed for spanned and unspanned records, respectively?

4. What is the block (space) utilization in both cases?

5. Assume that the disk has a read bandwidth of 1 GB/sec. Suppose that data is stored sequentially. What is the time to read all records in the unspanned configuration?

If records do not exactly fit in a block, we have two choices: (i) Waste the space at the end of each block and (ii) Start a record at the end of a block and continue on the next. Choice (i) is the unspannedoption. Choice (ii) is the spanned option