Getting Information about Hard disk : Linux HOWTO

Getting Information about the Hard drive in Linux:

# hdparm /dev/sda

multcount    = 16 (on)
IO_support   =  0 (default 16-bit)
unmaskirq    =  0 (off)
using_dma    =  1 (on)
keepsettings =  0 (off)
readonly     =  0 (off)
readahead    = 256 (on)
geometry     = 16383/255/63, sectors = 234375000, start = 0

Add the -i option for more information:

# hdparm -i /dev/sda


Model=IC35L120AVV207-1, FwRev=V24OA66A, SerialNo=VNVD09G4CZ6E0T
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=52
BuffType=DualPortCache, BuffSize=7965kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=234375000
IORDY=on/off, tPIO={min:240,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
AdvancedPM=yes: disabled (255) WriteCache=enabled
Drive conforms to: SATA T13 1410D revision 3a:  2 3 4 5 6

How fast is your drive? 

# hdparm -tT /dev/hda

Timing buffer-cache reads:   128 MB in  0.41 seconds =315.32 MB/sec
Timing buffered disk reads:  64 MB in  1.19 seconds = 53.65 MB/sec 

Need to find your device? 

# mount
# cat /proc/partitions
# dmesg | egrep '^sd'

sda: IC35L120AVV207-1, SATA DISK drive
sdc: Lite-On LTN486S 48x Max, ATAPI CD/DVD-ROM drive
sda: max request size: 1024KiB
sda: 234375000 sectors (120000 MB) w/7965KiB Cache, CHS=16383/255/63, UDMA(100)

Finally, if you want to turn on DMA: 

# hdparm -d1 /dev/sda

setting using_dma to 1 (on)
using_dma    =  1 (on)

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