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тАО01-26-2010 03:33 AM
тАО01-26-2010 03:33 AM
after upgrade same speed
We upgraded a MSL6000 from 2 ultrium 2 (fc drives) drives to 2 ultirum 4 1840 fc drives and we have same speed/time for backups?
We also upgraded the fc router on the library with the e200-300 4gb fc one.
Is there some additional settings that need to be done?
Also when we ran the hp lto tools to upgrade firmware it showed that library already had the newest firmware?
thanks
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тАО01-26-2010 05:46 AM
тАО01-26-2010 05:46 AM
Re: after upgrade same speed
Performance problems with backups almost never have to do with the tape drives. The problem is usually with collecting the backup data from around the backup clients in order to write it to the tape drives.
So what does your backup traffic flows look like? You need to check from where the backup data originates, (reading the disks on a slow backup client), how does it get to the media server (LAN traffic) before it can be written to the tapes.
Also the LTO4 drives need a lot of data to be sent to them in order to be efficient. Very rarely you have enough data to keep an LTO4 drive busy. Most likely LTO3 drives would have been more appropriate.
You need to provide more details about your backup environment.
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тАО01-26-2010 07:06 AM
тАО01-26-2010 07:06 AM
Re: after upgrade same speed
Hope this helps!
Regards
Torsten.
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тАО01-26-2010 09:14 AM
тАО01-26-2010 09:14 AM
Re: after upgrade same speed
Which version of the MSL6000 do you have ?
I'm guessing the "hot plug" version which is limited to the speed that the drives can run out.
See this advisory:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00598538тМй=en&cc=us&taskId=101&prodSeriesId=316040&prodTypeId=12169
Note the bottom line:
"There is no workaround for the speed limiting. Therefore, it is recommended to only upgrade the hot-plug MSL5000 and MSL6000 libraries with newer drives if capacity (not performance) is the main driver for the upgrade."
Cheers,
Rob
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тАО01-26-2010 11:47 AM
тАО01-26-2010 11:47 AM
Re: after upgrade same speed
This will turn out to be a waste of time and money if we cannot get these speeds up. I don't understand why in the specifications than it says that ult-2 drives can do 345.6 GB/hr (2 drives) and ult-4 drives can do 1.152 TB/hr (2 drives). What do these specifications mean than?
Thank you for your answers.
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тАО01-26-2010 11:53 AM
тАО01-26-2010 11:53 AM
Re: after upgrade same speed
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
No support by private messages. Please ask the forum!
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тАО01-26-2010 12:07 PM
тАО01-26-2010 12:07 PM
Re: after upgrade same speed
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тАО01-27-2010 12:48 AM
тАО01-27-2010 12:48 AM
Re: after upgrade same speed
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тАО01-27-2010 04:09 AM
тАО01-27-2010 04:09 AM
Re: after upgrade same speed
To use the full potential speed of these tape drives, you need some backup software that's organized with a
"backup server" that control's backup processing
"media server/agent" on a server with LTO drives
"backup agents" on servers that need to be backed up.
the backup-server instructs multiple (!) backup agents to send data to a media server.
This data throughput is accumulated at the media server until anough is reached to utilize the full speed of the LTO drive.
Only with enough servers (and agents) to keep the data sream flowing at the right throughput the LTO drive can perform at maximum speed.
It's possible that near the end when (several) agents have run out of data to backup, speed will decrease again.
Even with local SAN volumes there needs to be an agent to accumulate data from several volumes instead of processing volume-by volume.
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тАО01-27-2010 05:05 AM
тАО01-27-2010 05:05 AM
Re: after upgrade same speed
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
No support by private messages. Please ask the forum!
If you feel this was helpful please click the KUDOS! thumb below!