I'm running Ubuntu 10.04 64bits in a 500GB Seagate Barracuda ES.2 with a
16MB cache and hdparm it's reporting BuffSize=0kB
Here are some of the outputs of hdparm:
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hdparm -i /dev/sda
/dev/sda:
Model=ST3500320NS, FwRev=SN04, SerialNo=9QM182PR
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=unknown, BuffSize=0kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=976773168
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=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-6 T13 1410D revision 2: ATA/ATAPI-4,5,6
* signifies the current active mode
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hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 13180 MB in 2.00 seconds = 6600.38 MB/sec
Timing buffered disk reads: 316 MB in 3.02 seconds = 104.73 MB/sec
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https://bugs.launchpad.net/bugs/31072
Title:
Hard drive BuffSize=0kB
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