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Disk striping

Striping enables you to enhance your system's performance. Several rules enable you to monitor important parameters such as the number of columns in a stripe plex or RAID-5 plex, and the stripe unit size of the columns.

Checking the configuration of large mirrored-stripe volumes (vxse_mirstripe)

To check whether large mirror-striped volumes should be reconfigured as striped-mirror volumes, run rule vxse_mirstripe.

A large mirrored-striped volume should be reconfigured, using relayout, as a striped-mirror volume to improve redundancy and enhance recovery time after failure.

See "Converting between layered and non-layered volumes" on page 309.

Checking the number of columns in RAID-5 volumes (vxse_raid5)

To check whether RAID-5 volumes have too few or too many columns, run rule vxse_raid5.

By default, this rule assumes that a RAID-5 plex should have more than 4 columns and fewer than 8 columns.

See "Performing online relayout" on page 303.

Checking the stripe unit size of striped volumes (vxse_stripes1)

By default, rule vxse_stripes1 reports a violation if a volume's stripe unit size is not set to an integer multiple of 8KB.

See "Performing online relayout" on page 303.

Checking the number of columns in striped volumes (vxse_stripes2)

The default values for the number of columns in a striped plex are 16 and 3. By default, rule vxse_stripes2 reports a violation if a striped plex in your volume has fewer than 3 columns or more than 16 columns.

See "Performing online relayout" on page 303.