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- Surestore Ultrium 215/230 Variable Speed?
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тАО10-04-2001 11:23 AM
тАО10-04-2001 11:23 AM
I ran across something interesting today on HP's website. They indicate that the Surestore 215 can:
"And tape speed automatically adjusts to slower hosts, reducing frequent repositions caused by data stream interruptions, increasing overall speed and reliability."
I was under the impression that the LTO standard does not allow for variable speed write.
Is this true?
Can it sustain a slower transfer rate?
Is the 230 capable of adjusting it's speed?
Can the 215 be used in a 2/20 tape library?
I am in an environment where I can not guarantee my data transfer rate. This is the primary reason I have been hesitating to move to an LTO solution. Any info would be greatly appreciated. I would love to get a hold of the number for LTO 2nd tier technical support if anyone has it. I spoke to an HP tech that was not able to help me much.
Thanks
Robert W.
"And tape speed automatically adjusts to slower hosts, reducing frequent repositions caused by data stream interruptions, increasing overall speed and reliability."
I was under the impression that the LTO standard does not allow for variable speed write.
Is this true?
Can it sustain a slower transfer rate?
Is the 230 capable of adjusting it's speed?
Can the 215 be used in a 2/20 tape library?
I am in an environment where I can not guarantee my data transfer rate. This is the primary reason I have been hesitating to move to an LTO solution. Any info would be greatly appreciated. I would love to get a hold of the number for LTO 2nd tier technical support if anyone has it. I spoke to an HP tech that was not able to help me much.
Thanks
Robert W.
Solved! Go to Solution.
2 REPLIES 2
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тАО10-05-2001 01:21 AM
тАО10-05-2001 01:21 AM
Solution
Hello,
Both Ultriums (230/215) use what is called as Adaptive Tape Speed (ATS). Tape speed varies to keep the 16Mb data buffer at a predefined level, preventing stream failure over slow hosts. It decreases the number of repositions, thus improving reliability and reducing returns.
The 230 range adapts speed from 6.1Mb/s to 15Mb/s, or 1.62-4m/s tape speed, whereas the 215 range ranges from 6.1-7.5Mb/s, or 1.62-2m/s tape speed.
Yes, the 2/20 accepts LTO 215 drives.
Hope this helps,
Vince
Both Ultriums (230/215) use what is called as Adaptive Tape Speed (ATS). Tape speed varies to keep the 16Mb data buffer at a predefined level, preventing stream failure over slow hosts. It decreases the number of repositions, thus improving reliability and reducing returns.
The 230 range adapts speed from 6.1Mb/s to 15Mb/s, or 1.62-4m/s tape speed, whereas the 215 range ranges from 6.1-7.5Mb/s, or 1.62-2m/s tape speed.
Yes, the 2/20 accepts LTO 215 drives.
Hope this helps,
Vince
Tape Drives RULE!!!
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тАО10-05-2001 06:03 AM
тАО10-05-2001 06:03 AM
Re: Surestore Ultrium 215/230 Variable Speed?
Thanks Vincent that answered all my questions and then some. A perfect 10.
-Robert W.
-Robert W.
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