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host:~# hddtemp /dev/sda
/dev/sda: WDC WD1500AHFD-00RAR5: 41°C
- hddtemp does not allow device monitoring for drives connected to a RAID controller, but it can report the chipset temperatures on some Areca, Adaptec, LSI, and 3ware controllers.
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host:~# hddtemp /dev/sdb
/dev/sdb1: Areca ARC-1210-VOL#00: 30°C
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host:~# hddtemp /dev/sd[a-z]
/dev/sda: WDC WD1500AHFD-00RAR5: 41°C
/dev/sdb: Areca ARC-1210-VOL#00: 30°C
Credit: Blog O' Matty.