Hello Golden-Punk ;) Did you read the mailing starting this thread? Speaking about: """ === Before ===
~ # hdparm -tT /dev/mapper/isw_xxxxxxxxx_Volume0 """ You are still "Before" ... Whenever you are seeing "/dev/mapper" you are using dmraid (device-mapper raid). --> Joels point was: To get more speed you should try to switch to mdadm. --> then you will see /dev/mdXXX (e.g. /dev/md126 by default or if you follow Joels instructions /dev/md0). Knuth --- On 12/03/2010 01:19 PM, Silverrocker wrote: > Hi newgroup > > I have a question about my fakeraid setup and how come it's not as fast > as it should be. I'm on a Z13 with 4 sdd's (each 64GB sized, totaling > 256GB). > > I ran hdparm -Tt on the dmraid and aswell as on the single drivers with > the following output: > > > [silverroc...@freya ~]$ sudo hdparm -Tt /dev/mapper/isw_didhdcbhd_Volume0 > > /dev/mapper/isw_didhdcbhd_Volume0: > Timing cached reads: 10240 MB in 2.00 seconds = 5123.22 MB/sec > Timing buffered disk reads: 550 MB in 3.01 seconds = 183.00 MB/sec > [silverroc...@freya ~]$ sudo hdparm -Tt /dev/mapper/isw_didhdcbhd_Volume0 > > /dev/mapper/isw_didhdcbhd_Volume0: > Timing cached reads: 9370 MB in 2.00 seconds = 4687.60 MB/sec > Timing buffered disk reads: 672 MB in 3.00 seconds = 223.99 MB/sec > [silverroc...@freya ~]$ sudo hdparm -Tt /dev/sd > sda sdb sdc sdd > [silverroc...@freya ~]$ sudo hdparm -Tt /dev/sda > > /dev/sda: > Timing cached reads: 9960 MB in 2.00 seconds = 4982.34 MB/sec > Timing buffered disk reads: 436 MB in 3.01 seconds = 144.95 MB/sec > [silverroc...@freya ~]$ sudo hdparm -Tt /dev/sdb > > /dev/sdb: > Timing cached reads: 9562 MB in 2.00 seconds = 4783.64 MB/sec > Timing buffered disk reads: 438 MB in 3.00 seconds = 145.91 MB/sec > [silverroc...@freya ~]$ sudo hdparm -Tt /dev/sdc > > /dev/sdc: > Timing cached reads: 9992 MB in 2.00 seconds = 4998.56 MB/sec > Timing buffered disk reads: 434 MB in 3.01 seconds = 144.42 MB/sec > [silverroc...@freya ~]$ sudo hdparm -Tt /dev/sdd > > /dev/sdd: > Timing cached reads: 9822 MB in 2.00 seconds = 4913.14 MB/sec > Timing buffered disk reads: 436 MB in 3.01 seconds = 144.86 MB/sec > > > > I'm running archlinux with the lts kernel (3.6.32) > > greets > > Silverrocker > > > > _______________________________________________ > Mailing list: https://launchpad.net/~sony-vaio-z-series > Post to : [email protected] > Unsubscribe : https://launchpad.net/~sony-vaio-z-series > More help : https://help.launchpad.net/ListHelp
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