On Sunday 29 June 2003 11:13, Sami Näätänen 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. Glück Auf Volker -- [EMAIL PROTECTED] mailing list
