Re: Cache size of the hard drive?

On Sat, 31 May 2008 15:14:41 -0400
"Qiuli Han" <ivyharry@xxxxxxxxx> wrote:

I am trying to see how much cache does my hard drive have. I installed
hwinfo, but it only gives me some hardware vendor information and system
location information.

Is there anyway I can see my disk's cache size?

running 8.04, hard disk is: WDC WD3200KS-00P (as per hwinfo)

Hi,

no need to install extra software ;-)
You can just use hdparm, here is an example on my hard drive
(replace sda with the relevant device name of your own drive of course).

-----------------------------
$ sudo hdparm -i /dev/sda
[sudo] password for vincent:

/dev/sda:

Model=SAMSUNG HD502IJ , FwRev=1AA01110,
SerialNo=S13TJDWQ412337 Config={ Fixed }
RawCHS=16383/16/63, TrkSize=34902, SectSize=554, ECCbytes=4
BuffType=DualPortCache, BuffSize=16384kB, 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=yes: disabled (255) WriteCache=enabled
Drive conforms to: unknown: ATA/ATAPI-3,4,5,6,7
--------------------------------

My drive has 16MB of cache, it is described above as "BuffSize=16384kB".

You can also use hdparm -I (upper case 'i') to display even more
information about your drive.

Just run "man hdparm" to see all the options available ;-)

--
Vince

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