Category Archives: Oracle ASM

ASM resilvering – or – how to recover your crashed cluster

In this and the following posts i will perform some crash and recover scenarios and show how to recover the cluster successfully. At the moment the following tests are planned and will be published during the next days: suddenly turning … Continue reading

Posted in Oracle 11g Release 2, Oracle ASM, Oracle in general | 2 Comments

ASM resilvering – or – how to recover your crashed cluster – Test no 4

Test #4: Corrupting the ASM disk with ASM disk group being online and active After overwriting the ASM disk header while the disk group was offline we will now put some load on the full running cluster and corrupt the … Continue reading

Posted in Oracle 11g Release 2, Oracle ASM | 3 Comments

Oracle 11 Release 2 Install Guide – ACFS and ADVM

ACFS and ADVM System configuration We will use the system configured and installed in part 2 General information ADVM = ASM dynamic volume manager ACFS = ASM cluster file system Basic layout (Source: Oracle Database Storage Administrator’s Guide 11g Release … Continue reading

Posted in Oracle 11g Release 2, Oracle ASM | 9 Comments

Building and using the kfed utility

When using ASM sometimes it it extremely helpful to get more information on the asm disk header. The “kfed” utility from oracle enables to dump the asm disk header and many more. With this tool corruptions to the asm can … Continue reading

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Using ASM with files (either locally or via NFS)

From time to time i need to configure additional and temporary storage for data migration or just testing purposes. Raw Devices are not recommended to use from 11g onwards. So why not use the loopback device for that? With this scenario … Continue reading

Posted in Oracle ASM, Oracle in general | 3 Comments