| Tape drives remain the leading technology
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| | the sizes and locations of the files on
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| used by organizations for backup and
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| | disk and is generally unpredictable, but
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| archiving. However, the plethora of tape
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| | can be determined by the use of
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| drives on the market can make choosing
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| | specialised software.Secondly, if data is
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| the appropriate tape drive a confusing
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| | being transferred over a network of
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| task. How do you select a tape drive that
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| | computers to a backup server, the network
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| satisfies your needs without blowing the
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| | may be incapable of supplying data at a
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| budget? The following are just some of
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| | sufficient rate. The maximum throughput
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| the main factors to consider.1.
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| | of a network is predictable and easy to
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| CapacitySelect a tape drive that has
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| | measure, based on previous network
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| sufficient capacity to store your
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| | performance.Consider a network using
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| backups. Tape drives are able to compress
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| | 10BaseT Ethernet. This transfer rate
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| data so that more data may fit on the
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| | through this type of network cannot
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| tape, which is why manufacturers specify
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| | exceed 10MB/s, so it is immediately
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| both a native capacity and a compressed
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| | apparent that a tape drive requiring 20MB
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| capacity, usually
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| | s is
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| with a compression ratio at 2:1.
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| | inappropriate.3. Reliability and duty
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| However, highly-compressed files such as
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| | cycleA simple way to gauge the
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| those in video and sound formats are
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| | reliability of a tape drive is to find
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| hardly compressible at all. For this
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| | out the Mean Time Between Failure (MTBF)
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| reason, do not heed the specified
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| | as specified by the manufacturer. You
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| compressed capacity when choosing a tape
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| | should note, however, that the MTBF is
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| drive.A good way to determine the size of
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| | usually specified at a certain duty
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| the backup job after compression is to
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| | cycle. For example, consider a Travan
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| study logs of past backups. If these are
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| | tape drive with a MTBF of 370,000 hours
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| unavailable, it is safe to assume that
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| | at 20% duty cycle. The drive will only
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| the data can be compressed at a ratio of
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| | have an average of 370,000 hours between
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| 1.4:1, unless the hard drive contains an
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| | failures if it is run less than 20% of
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| usually large number of highly-compressed
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| | the time (about 4.8 hours per day), and
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| files.2. Transfer rateThe transfer rate
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| | running the tape drive for any longer
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| of the tape drive is becomes important
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| | will significantly reduce the reliability
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| when there is limited "window of
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| | of the drive.4. PriceThere is no point
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| opportunity" in which backup jobs may
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| | purchasing the highest-range tape drive
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| run. It is often desirable for backups to
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| | if it's simply too expensive. Consider
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| take place during the night when network
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| | how much value-for-money the tape drive
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| use is at its lowest.Select a tape drive
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| | will give you. Are you willing to pay
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| that is capable of completing a backup
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| | more
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| job within your window of opportunity.
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| | for extra performance? Or do you need to
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| For instance, to back up 400GB per night,
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| | sacrifice some performance to save on
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| you will require a transfer rate of about
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| | costs?If you choose wisely, you should
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| 30GB/hour.A little known fact about tape
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| | end up with a tape drive that fulfils
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| drives is that data must be supplied to
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| | your organization's tape backup and
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| them at a sufficient rate in order to
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| | archiving needs, without blowing the
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| keep them streaming, or else the tape
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| | budget.Linus Chang is a backup expert and
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| suffers from start-stop motion.
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| | the lead developer of BackupAssist --
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| This motion severely degrades the life
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| | tape backup software that is simple and
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| of the drive and tapes and the
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| | affordable, and perfect for small and
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| reliability of backups.There are two
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| | medium businesses. Protect your Windows
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| usual reasons why tape drive are not be
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| | servers, including SQL Server and
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| supplied with data at a sufficient rate.
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| | Exchange Server, to tape, REV drive, hard
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| Firstly, the rate at which data is read
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| | drive, NAS and more, at a fraction of the
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| from the hard disk of the server is
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| | cost of other backup software.
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| insufficient. This rate is dependent on
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