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ASM on Windows

From: Koivu, Lisa <Lisa.Koivu_at_Cendant-TRG.com>
Date: Wed, 12 May 2004 16:20:34 -0400
Message-ID: <840C139B79E7CC4496B2594E9E35E96703E7D5B1@floexmailbe2.ffci.com>


Hello everyone,=20

I thought I'd document this for the next poor sap that tries to do this on Windows.

The ASM-specific documentation does not discuss the tool asmtoolg.exe. This tool must be used to 'stamp' the disks for use by ASM. Prior to asmtoolg.exe executing, a logical drive must be created. This is all detailed in the RAC Manual (of all places), because it looks like ASM is implementing OCFS. The documentation never really says that directly, but after reading the below paragraphs and thinking it through, it makes sense.

<snip>

7.3 Prepare Disks for Database Storage=20

You need to configure disk storage for use with Automatic Storage Management (ASM). ASM storage consists of one or more disk groups, each of which can span multiple disks. To prepare the shared disks that you identified in Section 5, "Check Disk Space Requirements", you need to create two or more logical drives, each on a different shared disk, for a total of at least 7 GB. To prepare each logical drive, perform these steps:=20

Navigate to Start > Settings > Control Panel > Administrative Tools > Computer Management=20

Expand the Storage folder to Disk Management=20

Identify a shared disk that contains the required amount of free space and right click inside an unused part of an extended partition.=20

Choose Create Logical Drive in the option window and a wizard presents pages for configuring the logical drive.=20

Enter the size that you want for the partition. All of the partitions that you create for your ASM disk groups should include as much of the free space on the disk as possible. Additionally, however, the partitions should all be the same size.=20

Choose the option Do not assign a drive letter and then choose the option Do not format this partition. Click Finish on the last page of the wizard.=20

9 Stamp the Logical Drives for ASM=20
To enable disk discovery during the database install, the logical drives used to store your database files must be stamped with an ASM header using a GUI tool called asmtoolg. All disk names created by the tool begin with the prefix ORCLDISK for identification purposes. Complete the following procedure to stamp the logical drives that you created in the Section 7.3, "Prepare Disks for Database Storage":=20

To open the tool, double-click CRS home\BIN\asmtoolg where CRS home is the directory that you identified in Step 2 of Section 8, "Install Cluster Ready Services".=20

Select Add or change label and click Next on the Welcome screen.=20

On the Stamp Disks screen, select the disks to stamp and keep the default settings for Generate stamps with this prefix, then click Next.=20

Click Next on the Stamp disks screen.=20

Click Finish to save your work and exit from the tool.=20
<snip>

I'm out of luck because I have one raid-5 disk that has everything on it (dev box). There's no unallocated disk available. =20

Maybe this is all simple and everything, but it wasn't readily apparent to me. The pretty gui wizards never said anything about it in the help or all the dialog boxes.=20

I hope this helps someone.=20

Lisa Koivu
Sr. Monkey
Orlando, FL, USA

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Received on Wed May 12 2004 - 15:21:19 CDT

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