Linux如何查看硬盤型號和緩存？方法：hdparm? -i /dev/sda1

hdparm? -i /dev/sda1

/dev/sda1:

Model=WDC WD10EACS-00ZJB0(硬盤型號) ????????????????? , FwRev=01.01B01, SerialNo=???? WD-WCASJ0976997

Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }

RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50

BuffType=unknown, BuffSize=16384kB(硬盤緩存), MaxMultSect=16, MultSect=?16?

CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455

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

AdvancedPM=no WriteCache=enabled

Drive conforms to: Unspecified:? ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7

* signifies the current active mode

[root@host96 ]# hdparm? -i /dev/sda1

/dev/sda1:

Model=Hitachi HDT721010SLA360???????????????? , FwRev=ST6OA31B, SerialNo=????? STF604MR2DG61P

Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }

RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=56

BuffType=DualPortCache, BuffSize=15001kB, MaxMultSect=16, MultSect=?16?

CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455

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

AdvancedPM=yes: disabled (255) WriteCache=enabled

Drive conforms to: unknown:? ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7

* signifies the current active mode

linux/centos系統的服務器如何用hdparm測試硬盤性能，測試硬盤速度？

[root@host88 ]# hdparm -tT /dev/sda8

/dev/sda8:

Timing cached reads:?? 8512 MB in? 2.00 seconds = 4262.60 MB/sec

Timing buffered disk reads:? 222 MB in? 3.02 seconds =? 73.58 MB/sec

[root@host96 ]# hdparm -tT /dev/sda2

/dev/sda2:

Timing cached reads:?? 7684 MB in? 2.00 seconds = 3848.10 MB/sec

Timing buffered disk reads:? 116 MB in? 3.15 seconds =? 36.82 MB/sec

注意，hdparm -tT 必須要在機器空閑的時候測試才準確，機器繁忙的時候是測不準的。如果有小于20MB/Sec的結果，那么磁盤的IO性能就不怎么樣了。

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