Joel's Final project

1. Raid 5 ServersRaid 5 Servers
Raid 5 Servers -Raid 5 Servers -
There uses, functions andThere uses, functions and
purposespurposes

2. What is a RAID Server?What is a RAID Server?
 R.A.I.D - Redundant array of independentR.A.I.D - Redundant array of independent
disksdisks
 RAID servers use redundancy and parityRAID servers use redundancy and parity
to make sure no data is lost even if a driveto make sure no data is lost even if a drive
fails.fails.
 There are different types of RAID serversThere are different types of RAID servers
RAID 0 through RAID 6RAID 0 through RAID 6

3. Why RAID 5?Why RAID 5?
 RAID 5 offers the bestRAID 5 offers the best
redundancy at anredundancy at an
affordable price.affordable price.
 If you lose a sector ofIf you lose a sector of
a disk or even ana disk or even an
entire disk you canentire disk you can
still recover the datastill recover the data
 RAID 5 requires aRAID 5 requires a
minimal of 3 disks.minimal of 3 disks.

4. RAID 5 Vs. Other RAID ModelsRAID 5 Vs. Other RAID Models
 RAID 0 was never used due to high failure rateRAID 0 was never used due to high failure rate
and expensive and corrupted data recovery.and expensive and corrupted data recovery.
 RAID 1 and RAID 2 use very little redundancyRAID 1 and RAID 2 use very little redundancy
between disks and were quickly made obsoletebetween disks and were quickly made obsolete
for RAID 3 and RAID 4for RAID 3 and RAID 4
 RAID 3 and RAID 4 were again made obsoleteRAID 3 and RAID 4 were again made obsolete
by RAID 5 very soon after they wereby RAID 5 very soon after they were
implemented although these are still used byimplemented although these are still used by
some small buisnessess due to the cost ofsome small buisnessess due to the cost of
upgrading to RAID 5upgrading to RAID 5
 RAID 6 and up is just adding redudancy to theRAID 6 and up is just adding redudancy to the
RAID 5 setup and although makes the data saferRAID 5 setup and although makes the data safer
the price increase is not justified for mostthe price increase is not justified for most
companies.companies.