Solved

Optical backup

Posted on 2006-06-27
5
875 Views
Last Modified: 2008-01-09
Please explain optical backup and what are the advantage over tape back ups.
0
Comment
Question by:mputnam31
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 
LVL 88

Expert Comment

by:rindi
ID: 16998569
Pro optical drives:

Tape drives are more expensive than CD/DVD Drives, you can't read the data from the tapes directly.

Con optical drives:

CD's/DVD's have, compared to todays's standard tapes, room for only very little data amounts. You can only use them once (provided you don't use RW media, but RW media is very unreliable and should therefore not be used for archiving/backups of importance).
0
 
LVL 30

Expert Comment

by:ded9
ID: 16998825
0
 
LVL 5

Assisted Solution

by:VortexAdmin
VortexAdmin earned 50 total points
ID: 16998849
Optical backup is generally to a CD or DVD.  The biggest advantages are costs, although those aren't as huge when you consider the capacity.  Standard DVDs hold 4.7GB, dual layer's around 9GB.  Optical drives and media are not susceptible to magnetic interference (you can erase tape with magnets) and "less" susceptible to heat and the shelf life is a little longer.  For accessing you're data, they are much easier since you don't have to rewind and fast forward (which is done automatically by your drive).  Cost per MB and capacity considerations, nothing beats hard drives but you need to use multiples (RAID) to insure the integrity of your backup.
0
 
LVL 8

Accepted Solution

by:
Disorganise earned 75 total points
ID: 17000796
Beyond the fact that optical media isn't susceptible to magnetic corruption, I don't any real advantages is the backup world. (home use excepted)

Optical (assuming CD/DVD):
Not susceptible to magnetics
nice and thin for storage
Random access
Limited to around 10MB/s transfer rate
Limited to 30GB (being kind and assuming availability of blu-ray etc)
Cost per MB:  0.010c (assumes 4.5GB DVD's bought for about 50c each Australian)
Purchase price of drive very low

Tape:
Susceptible to magnetics
bit bulkier than CD/DVD
Sequential access - can be slow to find the file you want at restore time
Extremely high throughput - 60MB/s native for LTO3 with faster drives due soon.  To put this into perspective, you'll hit the throughput limit of NTFS before a tape holds you up
Extremely high density - 400GB native for LTO3 (reckon on storing 600GB per tape in practice).  higher capacities due soon.
Cost per MB:  0.011c (assumes LTO3 tape @$70 Australian and 1.5:1 compression - ie 600GB per tape)
Purchase price of drive can be high
Proven a trusted media for long term storage
0
 
LVL 1

Author Comment

by:mputnam31
ID: 17005832
I will stick with my taped backup, only disadvantage I see is cost of tapes (which I already own) and magnetic strip (which I can chance).  Thanks
0

Featured Post

Prepare for your VMware VCP6-DCV exam.

Josh Coen and Jason Langer have prepared the latest edition of VCP study guide. Both authors have been working in the IT field for more than a decade, and both hold VMware certifications. This 163-page guide covers all 10 of the exam blueprint sections.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The business world is becoming increasingly integrated with tech. It’s not just for a select few anymore — but what about if you have a small business? It may be easier than you think to integrate technology into your small business, and it’s likely…
A look at what happened in the Verizon cloud breach.
This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …
This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question