On Sunday 29 June 2003 11:13, Sami N��t�nen wrote: > On Sunday 29 June 2003 04:31, Zack Gilburd wrote: > > On Saturday 28 June 2003 08:36 am, Dhruba Bandopadhyay wrote: > > > Hello, > > > > > > Previously hdparm (-Tt) 5.3 gave me results of 752/41. Today I > > > upgraded to hdparm 5.4 and I get the following results! > > > > > > $ hdparm -Tt /dev/hda > > > > > > /dev/hda: > > > Timing buffer-cache reads: 2912 MB in 2.00 seconds = 1454.55 > > > MB/sec Timing buffered disk reads: 120 MB in 3.01 seconds = > > > 39.91 MB/sec > > >
> The fact that the result changed to twice as fast in the later version > of the hdparm is most likely a case of new test code, which does less > CPU work per transfered (read copied) byte. > I'd say, that the reason for this is, that hdparm 5.3 measures the time for reading 128mb from ram and 64mb from disk, While 5.4 measures how much mb are arriving in 2 sec for ram and ~3sec (+/-0.1) for disk. I compared 5.3 to 5.4 and my disks are not faster with 5.4, only the seconds that gone by and the used mb changed, the results are almost identical. Gl�ck Auf Volker -- [EMAIL PROTECTED] mailing list
