For years there’s been an ongoing discussion on whether disks are not worse than tapes or vice versa. In as much as discs have a number of edges over cassettes, there isn’t any denying that tapes are here to stay. Latest variants such as the LTO 7 provide exciting features like a larger storage capacity (up to 15TB) and a more rapid transfer rate of 750mb per second.
As businesses seek the best option for data back-up, the disk vs. tape debate is still continuing. Not everyone is quick to jump on to that one bandwagon, although there’s also cloud service.
In certain instances, while some people may consider tapes to function as the reverse discs are thought to be quicker, cost efficient and resilient. To comprehend what is accurate and what isn’t, here is an assessment of several facts about tapes that people often get wrong:
1. Are Tapes Slower Than Discs?
This really is a common premise that because disks are not older in relation to technological development, then they must provide backup services that are faster. The truth is, tapes would win, if it comes right down to raw speed. The speed is evident when you factor in additional housekeeping services which back-up systems offer. Discs apply a RAID protection strategy in order to keep down capacity prices. However, RAID slows down functionality in write- significant conditions. Considering that back-up processes are inclined to be write-heavy, it is no real surprise that tape would end up quicker than disks.
Most varieties of disc back-up systems possess some kind of deduplication which helps in removing redundant info, to fix this. In as much as deduplication does lead to capacity gain, additionally, it may result in slower operation which is as an effect of consuming additional CPU horsepower. For a disc to supply adequate back-up solutions, it’ll have to experience a great deal of processes that are complex. Also, these procedures will eat away at disc performance, slowing it down even more.
Due to the simplified manner in which data is written by tape, it allows for faster transfers. Moreover, since there is no deduplication or RAID process, data can be written by tapes faster.
2. Are Tapes Resilient Than Disks?
One of the reasons why most businesses opt to put money into disks is because of the perceived belief that tapes are as false as discs. This may be because of the fact that disks have RAID which shields them from drive failure, as well as dual – ported. The important issue related to disks, in this instance, is the amount of exposure they might experience should any of the parts fail.
Copies of the data are created following the backup procedure is complete although tapes do not have the RAID attribute. Most people would consider this to be too time consuming, but in the very long run; it offers an improved protection system. Then none of other backup tapes are affected, meaning the information remains safe, if one tape happens to fail. Additionally, the info on these types of tapes that are secondary may still be read with no decrease or fall in operation.