New answers tagged scsi
That disk is dying, seeing ata commands is not great. You can use smartctl to a do long test: smartctl --test=long /dev/sdb But if your running this in RAID1 using MDRAID, id look to replace it to be honest as it doesnt look great - unless its going via a raid card / sata extender, in which case trying plugging it directly into the mobo.
Your harddisk has issues, change it and restore from backup. SMART is not always reliable.
They're only negotiating at 40MBps. It's probably hardware. Do they negotiate to the same speed in the BIOS? Check your hardware. Better, replace that ancient rustpile.
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