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jbd2 writes blocks to the hard disk every 5 seconds. This makes an annoying click/tick noise and prevents the disk from spinning down to conserve power. jbd2 appears in logs as several entries like... Jul 19 21:35:45 edge kernel: [ 3312.913759] jbd2/sda5-8(350): WRITE block 42280704 on sda5 ... and can be observed using iotop. Since the noise only occurs in Ubuntu and not in Windows 7 it is probab
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