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Al Mulnick · Guest

I'm looking for good information on how to record and verify a hosts I/O on SAN connected storage.

Currently connected W2K with two dual HBA's to an EMC symmetrix SAN. Powerpath is loaded and reporting, but I have my doubts about what I'm seeing. I see, with a HP DL380 that the agent is reporting 2000 IOPS (the HBAs are load-balanced) but I only expected about 1000 peak. I'm wondering if I'm seeing what's sent to the agent and not what is actually happening at the hardware so I want to verify my results with another utility. I don't trust my storage team to understand the host OS and provide good information, so I ask the questions in hopes I can at least lead the conversation to resolution with them. Has anyone done this and have any suggestions etc for verifying what I'm seeing?
I have looked at some Microsoft docs that mention looking at queue length and read/write times, but I'm looking for more detailed information if its available.

Thanks,

-ajm

Shoaibm · Guest

Try using perfmon on windows server. You should be able to look at IOP, IOS and qdepth etc. Also are you using Mirosoft raid to create a volume or using EMC's solution
"Al Mulnick" <amulnick_No_SPAM@ncDOTrr.com> wrote in message news:OY7LiK1DEHA.2652@TK2MSFTNGP10.phx.gbl...
I'm looking for good information on how to record and verify a hosts I/O on SAN connected storage.

Currently connected W2K with two dual HBA's to an EMC symmetrix SAN. Powerpath is loaded and reporting, but I have my doubts about what I'm seeing. I see, with a HP DL380 that the agent is reporting 2000 IOPS (the HBAs are load-balanced) but I only expected about 1000 peak. I'm wondering if I'm seeing what's sent to the agent and not what is actually happening at the hardware so I want to verify my results with another utility. I don't trust my storage team to understand the host OS and provide good information, so I ask the questions in hopes I can at least lead the conversation to resolution with them. Has anyone done this and have any suggestions etc for verifying what I'm seeing?
I have looked at some Microsoft docs that mention looking at queue length and read/write times, but I'm looking for more detailed information if its available.

Thanks,

-ajm

Al Mulnick · Guest

Thanks. I'm using the emc solution to handle that. Additionally, I let EMC only present the volume size I want to use. I expect that the san will provide the availability and reliability I need, so I don't want to take cpu for that process.

I'll take a look at those counters. Thanks,

-ajm
"Shoaibm" <shoaibm@hotmail.com> wrote in message news:%23bMIITkHEHA.4052@TK2MSFTNGP12.phx.gbl...
Try using perfmon on windows server. You should be able to look at IOP, IOS and qdepth etc. Also are you using Mirosoft raid to create a volume or using EMC's solution
"Al Mulnick" <amulnick_No_SPAM@ncDOTrr.com> wrote in message news:OY7LiK1DEHA.2652@TK2MSFTNGP10.phx.gbl...
I'm looking for good information on how to record and verify a hosts I/O on SAN connected storage.

Currently connected W2K with two dual HBA's to an EMC symmetrix SAN. Powerpath is loaded and reporting, but I have my doubts about what I'm seeing. I see, with a HP DL380 that the agent is reporting 2000 IOPS (the HBAs are load-balanced) but I only expected about 1000 peak. I'm wondering if I'm seeing what's sent to the agent and not what is actually happening at the hardware so I want to verify my results with another utility. I don't trust my storage team to understand the host OS and provide good information, so I ask the questions in hopes I can at least lead the conversation to resolution with them. Has anyone done this and have any suggestions etc for verifying what I'm seeing?
I have looked at some Microsoft docs that mention looking at queue length and read/write times, but I'm looking for more detailed information if its available.

Thanks,

-ajm

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