Backup Strategies

Document Sample
Backup Strategies Powered By Docstoc
					   Data Storage and
   Backup Strategies
             Joe Cicero
           Revised by Jeanne Conlon

Northeast Wisconsin Technical College
     This Presentation Will Cover…
   Hard Copy - paper
   Floppy
   Zip Disk
   USB Memory Stick / Flash Memory
   Backup Partition
   External / 2nd Hard Drive – usb / 1394 etc
   Tape
   CD-R / CD-RW
   DVD-R / DVD-RW
         Data Storage / Backup Media…
               Things to consider
   Ease of use
   Ease of setup
   Durability (MTBF – mean time before failure)
        The ability of a product to be reused, without significant degradation.
   Resilience
        Resilience generally means the ability to recover from some shock, or disturbance.
   Susceptibility to EMI
        Electromagnetic Interference. A naturally occurring phenomena when the electromagnetic
         field of one device disrupts, impedes or degrades the electromagnetic field of another device
         by coming into proximity with it.
   Capacity
        The amount of space inside a container provided for a given amount of product.
   Transfer rates
        The rate at which data can be transferred,
   Cost
   Reuse
   Portability
                                Hard Copy - Paper
   Pro’s
           Ease of use
                  Easy to print things
           Ease of setup
                  Easy to setup a printer
           Durability (MTBF)
                  Fire / Water but other media will have a problem with this also
           Resilience
                  Dependent upon type of paper and ink
           Susceptibility to EMI
                  No


   Con’s
        Ease of use
                  It is not electronically searchable!
           Capacity
                  How much paper do you have?
           Transfer rates
                  Slow, print everything?
           Cost
                  Costly – paper, ink/toner, storage costs!
           Reuse
                  Not really reusable – maybe 1 time (back of sheet)
           Portability
                  Small amounts may be portable but not large boxes of paper backups!
                                                        Floppy
   Pro’s
           Ease of use
                  Pretty easy to use (if your system has one)
           Ease of setup
                  Requires little or no setup.
           Durability (MTBF)
                  Drive has 30000 power on hours / 3.2 years
           Re-usable
                  Yes, but may cause failure sooner
           Portable
                  Yes, but not if you have large amounts of data
   Con’s
        Durability (MTBF)
                  Floppies fail often
           Resilience
                  Only somewhat resilient
           Susceptibility to EMI
                  Yes
           Capacity
                  Very small capacity 1.4 meg
           Transfer rates
                  Slow - 500/300/250 kByte/s
           Cost
                  Would require many floppies, storage costs, etc.
                                                   Zip Disks
   Pro’s
           Ease of use
                  Fairly easy to use (much like a floppy)
           Durability (MTBF)
                  Disk is 100000 hours / Over 10 years on drive (est.)
           Resilience
                  Only somewhat resilient about the same as a floppy
           Capacity
                  Up to 750 Meg
           Transfer rates
                  Up to 7.5 MB/sec
           Reuse
               Yes, but may cause failure sooner
           Portable
                  Yes
   Con’s
           Susceptibility to EMI
                  Yes
           Ease of setup
                  Setup requires special drivers, programs, and equipment
           Cost
                  $9.00 per disk (for the amount of data could be considered expensive)
                                  USB Memory Stick
   Pro’s
           Ease of use
                  Very easy to use – plug and play!
           Ease of setup
                  In most cases requires no setup
           Durability (MTBF)
                  Pretec --> MTBF 500,000 hours (powered on)
                   Simpletech --> MTBF 1M+ hours
                   SanDisk --> MTBF 3M+ hours
                   BitMicro --> MTBF 2M+ hours = 228 years
           Resilience
                  Very Resilient
           Susceptibility to EMI
                  No
           Capacity
                  Depends… up to 16 Gig now ($200.00)
           Transfer rates
                  30 MB/sec
           Cost
                  Depends on size but use a “size to cost” ratio and it is fairly inexpensive
           Reuse
                  Yes
           Portable
                  Yes
   Con’s
           Small capacity as compared to other media
           Expensive for larger capacities or if you want to archive your backups
           Small… easily misplaced (put in the washer machine)
                                      Backup Partition
   Pro’s
           Ease of use
                  Yes, already in system, just requires creation
           Ease of setup
                  Pretty easy, built in software will allow for this.
           Durability (MTBF)
                  Depends of type of drive ATA, SCSI, SATA. One of western digitals… 5-year warranty and 1.2 million hours MTBF
           Resilience
                  Fairly Resilient
           Susceptibility to EMI
                  Yes, but not as susceptible as a floppy or zip disk
           Capacity
                  Very high now.
           Transfer rates
                  100MB per second data transfer rate.
           Cost
                  No additional cost involved – it’s a second partition!
           Reuse
                  Yes
   Con’s
           If device fails – separate partition doesn’t help
           Portable
                  No
                              External Hard Drive
   Pros
          Ease of use
                 As easy as a flash drive
          Ease of setup
                 No special setup required most of the time
          Durability (MTBF)
                 Same as an internal hard drive (5 years)
          Resilience
                 Fairly resilient
          Susceptibility to EMI
                 Yes, but not as much as other media
          Capacity
                 Very high now
          Transfer rates
                 100MB per second data transfer rate.
          Cost
                 Depends on size and where you buy – can be costly (250 GB HD $99.00)
          Reuse
                 Yes
          Portability
                 Yes
   Cons
          Can be damaged if dropped or mishandled
          Are somewhat vulnerable to EMI
          Could be considered expensive if used to archive files
                                                              Tape
   Pro’s
           Ease of use
                  Not hard but not easy.
           Ease of setup
                  Requires special hardware and software.
           Durability (MTBF)
                  a Travan tape drive has a MTBF of 370000 hours = 45 years
           Resilience
                  Worse than a disk, a tape is very mechanical.
           Capacity
                  Huge - 320GB Compressed Data Capacity
           Transfer rates
                  I’ve seen anywhere from 2 – 40 MBps
           Reuse
                  Yes, but I get worried about using them over and over again.
           Portability
                  Yes
   Con’s
        Durability (MTBF)
                  The tapes themselves are not as durable as other media
           Susceptibility to EMI
                  Yes
           Transfer rates
                  I’ve seen anywhere from 2 – 40 MBps
           Cost
                  (3) 20/40 GB Tapes $140.00
                                        CD-R / CD-RW
   Pros
          Ease of use
                 Fairly easy – especially now that software is built into Windows
          Ease of setup
                 Most systems come with CDR/RW already installed.
          Durability (MTBF)
                 Plextor 60000hrs MTBF = 6 years
          Susceptibility to EMI
                 No
          Capacity
                 700 MB
          Transfer rates
                 Mitsumi, Data Transfer Rate, 33.0 MB/s
          Cost
                 When purchased in bulk pennies per!
          Reuse
             RW = yes, R = no
          Portability
                 Yes
   Cons
          Resilience
                 Not very Resilient – dropped / scratched / heat warped
          Reuse
             RW = yes, R = no
                                                            DVD
   Pros
          Ease of use
                 Not much different than CD-R
          Ease of setup
                 Not much different than CD-R
          Durability (MTBF)
                 Plextor DVD MTBF 60 000h = 6 years
          Susceptibility to EMI
                 No
          Capacity
                 Typically 4-8 GB, However Nanotech to increase DVD capacity to 850 GByte
          Transfer rates
                 8X DVD drive can transfer data at a whopping 11.08MB
          Cost
                 Anywhere from .30 to $1.45
          Reuse
                 DVD-RW = Yes, DVD-R = No
          Portability
                 Yes
   Cons
          Resilience
              Not very Resilient – dropped / scratched / heat warped
          Reuse
                 DVD-RW = Yes, DVD-R = No
                         Web Links
 http://www.webopedia.com/TERM/R/RAID.html
 http://www.sata-io.org/esata.asp
   http://www.pc4usa.com/DetailSales.asp?productID=1214&parCat=&Sca
    tn=29&Catn=6
 http://electronics.howstuffworks.com/dvd3.htm
 http://www.theeldergeek.com/hard_drives_10.htm

				
DOCUMENT INFO