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тАО08-14-2008 06:52 AM
тАО08-14-2008 06:52 AM
1) Is it true the MSA1000 is only Ultra/160?
2) Could I use the SCSI ports instead to connect to a DL580G3's Smart Array and get Ultra320 speeds? (Essentially using the MSA1000 as an expensive disk shelf)
Thanks,
Greg
Solved! Go to Solution.
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тАО08-14-2008 07:35 AM
тАО08-14-2008 07:35 AM
Re: MSA1000
I do not think that the MSA1000 is designed for use as a simple drive shelf. That port is connected to the internal SCSI controller for adding a second drive shelf to the MSA1000.
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тАО08-14-2008 08:23 AM
тАО08-14-2008 08:23 AM
Re: MSA1000
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тАО08-14-2008 09:03 AM
тАО08-14-2008 09:03 AM
Re: MSA1000
You would need a 'dummy card' to replace an MSA1000 controller module to re-route the internal SCSI busses. I don't think that such a thing exists in this universe ;-)
However, there is a 'small brother' of the MSA1000 called the MSA500. It uses a different controller module and a different I/O module which allows external U320 connectivity.
Maybe you can get these components from somebody who did an MSA500-to-MSA1000 upgrade.
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тАО08-14-2008 10:31 AM
тАО08-14-2008 10:31 AM
Re: MSA1000
The spindles aren't going to hit U320 speeds anyway. You'll only get that if the data is coming out of cache. The controllers on the MSA1000 have a much larger cache module than the drives (assuming you bought it) and anything coming out of the controller cache should be at fibre speeds.
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тАО08-14-2008 10:39 AM
тАО08-14-2008 10:39 AM
Re: MSA1000
You think the MSA1000 should perform better then that? It's currently powered off, should I go build an array and check again?
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тАО08-14-2008 11:04 AM
тАО08-14-2008 11:04 AM
Re: MSA1000
check, whether you have cache enabled in the MSA1000 controllers pls, because otherwise all your reads/writes are going directly to the HDDisks which is much slower then cache...
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тАО08-14-2008 11:59 AM
тАО08-14-2008 11:59 AM
Re: MSA1000
I've just made a 4-disk RAID5 array with the same disks as the 4-disk RAID5 array in my DL580.
I'll benchmark the array tomorrow, once it is done parity initialization.
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тАО08-15-2008 05:33 AM
тАО08-15-2008 05:33 AM
Re: MSA1000
DL580G3, 4x147GB in RAID5, ESXi, VM running windows 2003 - I get around 100MB/sec write speeds, 140-150MB/sec read speeds (peaks at 196)
Same machine but with the VM moved over to the MSA1000 array (4x147GB RAID5).. write, ~70MB/sec, read ~55-50MB/sec.
Unfortunately the MSA's write is slower and the reads are almost 3 times slower.
Do you think using an MSA30 attached to the DL580 via SCSI I could keep those similar speeds? Perhaps the Smart Controller in the DL580G3 is just better then the rather out-dated MSA1000?
MSA1000 has latest firmware.. 5.02 or is it 5.2... active/passive.
Thanks for your help,
Greg
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тАО08-18-2008 12:01 PM