Same, running Ubuntu 10.04 AMD64, sdg is a Seagate 7200.11 1.5TB and
shows a BuffSize of 0Kb, however sda is a WD RE3 1TB and shows a
BuffSize of 32767kB.
hdparm -i /dev/sdg
/dev/sdg:
Model=ST31500341AS, FwRev=CC1H, SerialNo=XXXXXXXX
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=2930277168
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: unknown: ATA/ATAPI-4,5,6,7
* signifies the current active mode
hdparm -i /dev/sda
/dev/sda:
Model=WDC, FwRev=03.00C06, SerialNo=WD-XXXXXXXXXXXX
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50
BuffType=unknown, BuffSize=32767kB, 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 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 udma6
AdvancedPM=no WriteCache=enabled
Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6,7
* signifies the current active mode
/dev/sdg:
Timing cached reads: 182 MB in 2.04 seconds = 89.43 MB/sec
Timing buffered disk reads: 182 MB in 3.00 seconds = 60.65 MB/sec
r...@monkey-pc:~/.config# hdparm -tT /dev/sda
/dev/sda:
Timing cached reads: 184 MB in 2.04 seconds = 90.07 MB/sec
Timing buffered disk reads: 168 MB in 3.03 seconds = 55.43 MB/sec
Is performance affected by this issue?
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Hard drive BuffSize=0kB
https://bugs.launchpad.net/bugs/31072
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