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тАО01-05-2007 03:49 AM
тАО01-05-2007 03:49 AM
MSA1500 CS and Active/Passive versus Active/Active
I currently have a MSA1500 CS that has 4 MSA20 cabinets connected to it. It is currently being used in a Windows 2003 environment to provide disk to disk to tape storage which it does very well. Some of the times for the disk to disk writes are getting long and I was wondering if moving to active/active would provide any increase in performance when waited against the work involved in doing the upgrade.
As you can tell, I am very new to the idea of SAN attached storage. I have always used direct attached storage but the SAN was the recommended approach. I would like to know if there are best practice guides or white papers on the advantages of upgrading from Active/Passive to Active/Active so that I can make informed decisions about the upgrade.
Thanks
Greg Pagan
As you can tell, I am very new to the idea of SAN attached storage. I have always used direct attached storage but the SAN was the recommended approach. I would like to know if there are best practice guides or white papers on the advantages of upgrading from Active/Passive to Active/Active so that I can make informed decisions about the upgrade.
Thanks
Greg Pagan
Why does this always happen to me?
2 REPLIES 2
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тАО01-08-2007 02:23 AM
тАО01-08-2007 02:23 AM
Re: MSA1500 CS and Active/Passive versus Active/Active
Theoretically, you might get better performance using the Active Active controllers (fw upgrade req'd). Configuring act-act is a manual process done via the cli. I have played around with act-act but not tested for performance. Remember the MSA platform's controller throughput is only rated at 160mgs/p/sec. It the one component that has not been upgraded. Some performance gains are possible depending on how you have your arrays | disks laid out. HP white paper recommends optimum cfg of 7 disks in an array.
As for the HBA parameter settings, HP used to tweak them specifically for the storage device you were attaching to. If you have a test site to use, you might look into modifying the HBA settings. The only ones I've worked with are the time out values mainly for cluster failovers.
As for the HBA parameter settings, HP used to tweak them specifically for the storage device you were attaching to. If you have a test site to use, you might look into modifying the HBA settings. The only ones I've worked with are the time out values mainly for cluster failovers.
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тАО02-20-2007 04:36 AM
тАО02-20-2007 04:36 AM
Re: MSA1500 CS and Active/Passive versus Active/Active
James - you mention an HP white paper on RAID configuration, can you post a link for it?
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