# Disk cache settings & Live Migration

**URL:** <https://forum.opennebula.io/t/disk-cache-settings-live-migration/1811>\
**Category:** Product Support\
**Created:** [February 12, 2016, 4:29pm UTC](https://forum.opennebula.io/t/disk-cache-settings-live-migration/1811 "2016-02-12T16:29:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![bpsRobert](https://avatars.discourse-cdn.com/v4/letter/b/df788c/32.png) [@bpsRobert](https://forum.opennebula.io/u/bpsRobert)\
**Post date:** [February 12, 2016, 4:29pm UTC](https://forum.opennebula.io/t/disk-cache-settings-live-migration/1811/1 "2016-02-12T16:29:29Z")

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Hello:

It seems that, running VMs with multiple disks attached to it, require that the disks have cache setting to ‘none’ for the live migration to work. Is there a way to change/update the disk cache settings of disks that are already attached to running VMs?

Thank you,

-Robert

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**Author:** ![ruben](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.opennebula.io/ruben/32/19_2.png) [@ruben](https://forum.opennebula.io/u/ruben)\
**Post date:** [February 23, 2016, 12:15pm UTC](https://forum.opennebula.io/t/disk-cache-settings-live-migration/1811/2 "2016-02-23T12:15:12Z")

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Sorry there is no direct way to do so

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**Author:** ![bpsRobert](https://avatars.discourse-cdn.com/v4/letter/b/df788c/32.png) [@bpsRobert](https://forum.opennebula.io/u/bpsRobert)\
**Post date:** [February 23, 2016, 1:21pm UTC](https://forum.opennebula.io/t/disk-cache-settings-live-migration/1811/3 "2016-02-23T13:21:34Z")

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It seems the way around this is to specify the --unsafe flag in the live-migration. I only feel ok doing this because all disks that were previously attached to VMs, did not have any cache specification at all, so i assume the default with no cache specification also = none. It just wasn’t explicitly selected as ‘none’ so its not recorded as such, causing it to complain.