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MSL4048 performance

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Ender Wiggin
Advisor

MSL4048 performance

Hi there i have just bought 4 new MSL4048 with 2 LTO-4, according with:

http://h10010.www1.hp.com/wwpc/us/en/en/WF06a/12169-304612-304622-304622-304622-1842552.html

it is supposed that they can back up 2.3 TB/hr. (max i've reached up to now is about 600 Gb/hr using both drives of any librarie.

Anyone who has experienced something like this?
11 REPLIES
Andres_13
Respected Contributor
Solution

Re: MSL4048 performance

Hi, Could be thousands of things, pls provide more info:

SCSI cable or SAN attached?
Backup software?
OS being backed up?

Pls revert.
Ender Wiggin
Advisor

Re: MSL4048 performance

Tks for your quick response Andres. All of them are SAN attached, Data Protector 6.0 is tha backup software (HP-UX 11.11 cell server, all clients 11.23) and i thing this is not a hardware issue because it seems to have the same performance of a MSL6060 with LTO-3 tape drives.
Andres_13
Respected Contributor

Re: MSL4048 performance

Do you have the lastest patches for all DP components you are currently using? If not this is a good start.
Ender Wiggin
Advisor

Re: MSL4048 performance

Cell server and clients fully patched....
Andres_13
Respected Contributor

Re: MSL4048 performance

It's dificult to give one step solution and also i think this is not a libraries problem. You might want to test your hardware using LTT and based on the result of such test we can try other options. Just a thought i suspect this is an IO performance issue.
Ender Wiggin
Advisor

Re: MSL4048 performance

Ok let me test. From where i can download LTT?
Andres_13
Respected Contributor

Re: MSL4048 performance

Ender Wiggin
Advisor

Re: MSL4048 performance

Thanks, tomorrow will return with the test results!!
Tom O'Toole
Respected Contributor

Re: MSL4048 performance


One thing you may be able to try is an LTT devperf and sysperf test... They are supposed to isolate the tape and the disk subsystem performance, respectively. I'm not sure how accurate it is, but you should be getting a performance improvement from fibre attached lto4 drives, unless your disk subsystem can't drive it - 600Gb/hour is a lot to push.
Can you imagine if we used PCs to manage our enterprise systems? ... oops.
Andres_13
Respected Contributor

Re: MSL4048 performance

I don't know if HP must take care about this kind of issues based on that you have just bought this hardware and i would think they have to set up and test all hardware you've paided for... aren't they?
Andres_13
Respected Contributor

Re: MSL4048 performance

Any updates?