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тАО10-31-2005 09:43 AM
тАО10-31-2005 09:43 AM
Thanks,
Oscar
Solved! Go to Solution.
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тАО10-31-2005 02:59 PM
тАО10-31-2005 02:59 PM
Re: Ultrium 400GB tape does not go beyond 100GB capacity
Compression figures are not guaranteed. If what you're trying to back up is already highly compressed, you're not going to get much more than the native capacity onto tape.
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тАО11-01-2005 04:29 AM
тАО11-01-2005 04:29 AM
Re: Ultrium 400GB tape does not go beyond 100GB capacity
If an Ultrium-2 tape in an Ultrium-2 or Ultrium-3 drive, then native capacity is 200GB.
Thanks,
Scott
HP Support
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тАО11-01-2005 04:54 AM
тАО11-01-2005 04:54 AM
Re: Ultrium 400GB tape does not go beyond 100GB capacity
Thanks for your quick answer, I'm sending you the screen where the DP shows the size in MB for my Ultirum 2 cartdrige.
Any idea?
Thanks
Oscar
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тАО11-04-2005 07:48 AM
тАО11-04-2005 07:48 AM
SolutionThe size specified during the format of an LTOx tape is only used for initial statistics by DP.
Even if you specify eg a size of 1 MB or 1 TB, DP will write approximately 400 GB of compressed data on a tape (the actual compression ratio is data dependent, the ratio of 2:1 is an often used value).
The default size of a tape can be changed from 100 GB (default value for an LTO tape in DP) to 400 GB with the following entry in the 'global' options file:
MC_13=1 36 250 419430400 4
best regards,
Kurt
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тАО11-04-2005 09:06 AM
тАО11-04-2005 09:06 AM
Re: Ultrium 400GB tape does not go beyond 100GB capacity
What is the capacity of the drive, is it LTO-2
LTO-1 is 200/400GB(200 Normal and 400 compressed) and LTO-2 is 400/800GB. When did this problem start, is it there from teh beginning. If not what was the last change made( tape drive or DP). Normally the compression ratio said above is ccoplished by the Hardware compression feature of the drive. Check weather the H/W compression for the drive is set as enable. Try one more option to have a software compression.see the enclosed bmp file for detail.
regards,
Sunil
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тАО11-08-2005 06:03 AM
тАО11-08-2005 06:03 AM
Re: Ultrium 400GB tape does not go beyond 100GB capacity
Native capacity 200GB, compressed capacity 400GB
Depending on the data you are backing up you might not get the full space on the tape. Some files are not compressable or do not compress alot. Try long erasing the tape and reformat the tape with your Back up software.
Drives will automatically compress data, so you NEED to make sure that your back up software has software compression off. If software compression is on then this can cause the errors you mentioned.
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тАО11-08-2005 08:44 AM
тАО11-08-2005 08:44 AM
Re: Ultrium 400GB tape does not go beyond 100GB capacity
http://www.ultrium.com/newsite/images/UltRoadmap2005.jpg
As you can see, LTO-1 is 200GB compressed (100 uncompressed), LTO-2 is 400GB compressed and this year LTO-3 is 800GB compressed capacity.
LTO-3 from HP is Ultrium 960 Tape Drive.
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тАО11-11-2005 11:44 AM
тАО11-11-2005 11:44 AM
Re: Ultrium 400GB tape does not go beyond 100GB capacity
Which are 100GB, 200GB, and 400GB native capacity, respectively. Only the capacity is fixed by the standard, the native speeds vary between half-height and full-height, and also between HP, IBM, and Seagate/Certance/Quantum/company-of-the-year.
Ultrium960 is named as such because [800]GB 2:1 compressed + [160]MB/s 2:1 compressed is 960. Maybe they should have done the speeds in hex, or better yet, native speed/capacity instead of these unreliable 2:1 "salesman" numbers.
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тАО02-06-2006 01:50 AM
тАО02-06-2006 01:50 AM
Re: Ultrium 400GB tape does not go beyond 100GB capacity
Any pointers would be most appreciated.
Many thanks,
Colin Main