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If you have got a MySQL error which contains the text "got error 28 from table handler", then read on! 
The error often (but not always) looks something like this:
This error usually indicates a lack of free disk space on the hard drive partition being used for MySQL data storage on your server (usually '/var'). In most cases, this is only solvable by contacting your host and requesting that they free up some more disk space on this partition (or add in a bigger hard drive).
Please do not post threads asking what is wrong if you receive this error - we are unable to help you unless you speak to your host.
The error often (but not always) looks something like this:
Database error in vBulletin: Invalid SQL:
SELECT
session.userid AS sessionuserid,
post.*,post.username AS postusername,post.ipaddress AS ip,user.*,userfield.*,icon.title as icontitle,icon.iconpath,
attachment.attachmentid,attachment.filename,attachment.visible AS attachmentvisible,attachment.counter
,avatar.avatarpath,NOT ISNULL(customavatar.avatardata) AS hascustomavatar,customavatar.dateline AS avatardateline
FROM post
LEFT JOIN icon ON icon.iconid=post.iconid
LEFT JOIN user ON user.userid=post.userid
LEFT JOIN userfield ON userfield.userid=user.userid
LEFT JOIN avatar ON avatar.avatarid=user.avatarid
LEFT JOIN customavatar ON customavatar.userid=user.userid
LEFT JOIN attachment ON attachment.attachmentid=post.attachmentid
LEFT JOIN session ON (session.userid = user.userid
AND session.userid > 0
AND user.invisible = 0
AND session.lastactivity>998208277)
WHERE post.postid IN (0,5247,5248,5250,5259,5264,5268,5274,5278,5279,5281)
ORDER BY dateline
mysql error: Got error 28 from table handler
mysql error number: 1030
Date: ***
Script: /***
Referer: ***
SELECT
session.userid AS sessionuserid,
post.*,post.username AS postusername,post.ipaddress AS ip,user.*,userfield.*,icon.title as icontitle,icon.iconpath,
attachment.attachmentid,attachment.filename,attachment.visible AS attachmentvisible,attachment.counter
,avatar.avatarpath,NOT ISNULL(customavatar.avatardata) AS hascustomavatar,customavatar.dateline AS avatardateline
FROM post
LEFT JOIN icon ON icon.iconid=post.iconid
LEFT JOIN user ON user.userid=post.userid
LEFT JOIN userfield ON userfield.userid=user.userid
LEFT JOIN avatar ON avatar.avatarid=user.avatarid
LEFT JOIN customavatar ON customavatar.userid=user.userid
LEFT JOIN attachment ON attachment.attachmentid=post.attachmentid
LEFT JOIN session ON (session.userid = user.userid
AND session.userid > 0
AND user.invisible = 0
AND session.lastactivity>998208277)
WHERE post.postid IN (0,5247,5248,5250,5259,5264,5268,5274,5278,5279,5281)
ORDER BY dateline
mysql error: Got error 28 from table handler
mysql error number: 1030
Date: ***
Script: /***
Referer: ***
Please do not post threads asking what is wrong if you receive this error - we are unable to help you unless you speak to your host.
