Is the Linux subsystem not mountable?

I try to mount an image file, which prompts 

mount: a/: mount failed: Operation not permitted.
Virtual windows linux
Jun.24,2022

this generally belongs to insufficient permissions. You may need root permission to execute mount commands.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bbe308-303c5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bbe308-303c5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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