FS System: Linux hosts may take a long time creating a filesystem

Asset ID:	1-72-2153099.1
Update Date:	2016-09-22
Keywords:

Solution Type Problem Resolution Sure

Solution 2153099.1 : FS System: Linux hosts may take a long time creating a filesystem

Applies to:

Oracle FS1-2 Flash Storage System - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

On a Linux host when executing mkfs.ext4 to create a filesystem on a FS1-2 LUN the command may take longer than expected to complete.

Cause

By default mkfs.ext4 uses the discard option, it was found that the SCSI Inquiry response incorrectly indicated support for UNMAP within WRITE_SAME operations. This can cause a number of file system creation operations to take a very long time to complete.

Solution

The fix for this issue will be included in version 6.2.4 and higher.

If your FS1-2 is on release below 6.2.4 the workaround is to use mkfs.ext4 using the nodiscard option, below is an example:

# mkfs.ext4 <disk partition> -E nodiscard

For more information on mkfs.ext4 please see the man page.

References

<BUG:22612234> - COAXM086 LINUX MKFS -EXT 4 TOOK 9 MINUTES ON 500GB LUN

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