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
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https://bugs.launchpad.net/bugs/913050
Title:
Explicit APM values in hdparm-functions cause Load Cycle Count hell
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