HP VMA-series Memory Arrays Manual do Utilizador descarregar pdf (Página 172)

Chapter 10 - Performance Tuning and Troubleshooting

172

VMA-series Memory Array Installation and Service Guide

HP-AM456-9002A Rev 01

1. If the disk you are aligning is already blank (raw), go to Step 3. If the disk

contains data, back up the disk before proceeding.

2. Delete all partitions on the disk.

3. From the Windows 2003 Server, open a command prompt and run

Diskpart.exe.

4. At the diskpart command prompt, type List Disk and press ENTER.

If the disk you want to align does not appear in the list, make sure that it

exists and is accessible using the Disk Management snap-in.

5. At the diskpart command prompt, type Select Disk X.

Where

X is the number of the disk as shown in the output of the List Disk

command. The

diskpart utility should return a message that indicates that

Disk X is the selected disk.

6. At the diskpart command prompt, type Create Partition Primary

Align=64

7. At the diskpart command prompt, type Assign

Letter=<DriveLetter>

8. After the drive letter is assigned, type exit to exit the diskpart utility.

9. Use the Disk Management snap-in or the Format command to format the

partition as an NTFS-formatted partition.

Note: When formatting, select an Allocation Unit Size that is a multiple of

4kBs.

Reference: Microsoft Technet article

http://technet.microsoft.com/en-

us/library/aa998219.aspx

Network-Layer Performance Testing

The second step in fine tuning a Memory Array is to test the performance of the

network-layer.

Network-layer performance testing may be done in two phases. First, ensure

that all of the PCIe connections are high-bandwidth. The Memory Array is

designed to use either single PCIe x8 G1 or dual PCIe x4 G1 connections and will

not perform optimally if insufficient provisioned.

Once you have confirmed that the PCIe connections are high bandwidth, use the

perf_test utility to baseline the system by testing the read bandwidth, write

bandwidth, and a mix of reads and writes against the expected block size of the

application.

• Preliminary Network-Layer Checks on page 173

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HP VMA-series Memory Arrays Manual do Utilizador Página 172