I'm affected by this too (Same Notebook: Thinkpad T500, different HD SAMSUNG HN-M101MBB):
hdparm -B127 /dev/sda /dev/sda: setting Advanced Power Management level to 0x7f (127) APM_level = 127 so in my case it sticks to 127, but it spins down way to often (i.e. after a couple of seconds ~30? reading a web page) hdparm -i /dev/sda /dev/sda: Model=SAMSUNG HN-M101MBB, FwRev=2AR10001, SerialNo=S2R8J9HB908804 Config={ Fixed } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 BuffType=unknown, BuffSize=8192kB, MaxMultSect=16, MultSect=16 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=1953525168 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 AdvancedPM=yes: disabled (255) WriteCache=enabled Drive conforms to: unknown: ATA/ATAPI-0,1,2,3,4,5,6,7 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/913050 Title: Explicit APM values in hdparm-functions cause Load Cycle Count hell To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/hdparm/+bug/913050/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs