# media\_parts hash value

**URL:** <https://forums.plex.tv/t/media_parts-hash-value/80572>\
**Category:** Dev/API Corner\
**Tags:** other-dev\
**Created:** [October 22, 2014, 8:48am UTC](https://forums.plex.tv/t/media_parts-hash-value/80572 "2014-10-22T08:48:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![anon18523487](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@anon18523487](https://forums.plex.tv/u/anon18523487)\
**Post date:** [October 22, 2014, 8:48am UTC](https://forums.plex.tv/t/media_parts-hash-value/80572/1 "2014-10-22T08:48:30Z")

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Anyone know how the hash column is calculated? &nbsp;In metadata\_items, the hash column there is based on the guid field that is also there. &nbsp;The guid is based on the agent for that file. &nbsp;For items using the personal media scanner, it uses this hash value from media\_parts.

&nbsp;

My reason for this question is that I noticed that sometimes the guid is not updated which leads to wrong posters and metadata which are based on the hash in metadata\_items. &nbsp;In cases of home videos, the hash in media\_parts is also not updating, so the guid doesn't update, so that hash doesn't update, so posters do not update. &nbsp;So I want to manually update the hash in media\_parts so I can update down the line.

&nbsp;

Thanks in advance.

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**Author:** ![derekcentrico](https://sea1.discourse-cdn.com/plex/user_avatar/forums.plex.tv/derekcentrico/32/86438_2.png) [@derekcentrico](https://forums.plex.tv/u/derekcentrico)\
**Post date:** [December 31, 2014, 8:16pm UTC](https://forums.plex.tv/t/media_parts-hash-value/80572/2 "2014-12-31T20:16:13Z")

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Did you ever here anything about this?

Someone else just linked me to your post as possibly the same as my issue.

REF my thread: &nbsp;[https://forums.plex.tv/topic/134700-moved-libraries-per-plex-article-now-changes-are-lost/?p=808543&nbsp;](https://forums.plex.tv/topic/134700-moved-libraries-per-plex-article-now-changes-are-lost/?p=808543%C2%A0)

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**Author:** ![system](https://global.discourse-cdn.com/plex/original/3X/2/a/2acb9765406f63293d357b4ec509ec39aa28f2ad.png) [@system](https://forums.plex.tv/u/system)\
**Post date:** [December 21, 2019, 3:20am UTC](https://forums.plex.tv/t/media_parts-hash-value/80572/3 "2019-12-21T03:20:31Z")

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