David Haller
Am Mon, 12 Apr 2004, Martin Schmitz schrieb:
Hier eine Maxtor 6Y080L0 vom vergangenen Sommer: | apollo:~ # hdparm -t /dev/hda | Timing buffered disk reads: 152 MB in 3.00 seconds = 50.67 MB/sec | apollo:~ # hdparm -t /dev/hdb | Timing buffered disk reads: 170 MB in 3.00 seconds = 56.59 MB/sec
Entweder ist die erste ein Montagsgerät, oder die haben die Serie verbessert.
Weder noch. Das liegt im Schwankungsbereich von 'hdparm -t'... Lass es je Platte ein paarmal laufen...
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Das ist (je nach Bezugspunkt) eine Schwankungsbreite von 15.5-18.5%, d.h. bei Werten um 50 MB/s kannst du mit 7.5-9 MB/s Schwankungsbreite rechnen.
Das kann ich hier so nicht nachvollziehen (Ausgabe gekürzt): apollo:~ # for (( i=1; i<=10; i++)); do hdparm -t /dev/hda; sleep 1; done Timing buffered disk reads: 152 MB in 3.01 seconds = 50.53 MB/sec Timing buffered disk reads: 152 MB in 3.00 seconds = 50.62 MB/sec Timing buffered disk reads: 152 MB in 3.01 seconds = 50.46 MB/sec Timing buffered disk reads: 152 MB in 3.00 seconds = 50.60 MB/sec Timing buffered disk reads: 152 MB in 3.00 seconds = 50.63 MB/sec Timing buffered disk reads: 152 MB in 3.00 seconds = 50.63 MB/sec Timing buffered disk reads: 154 MB in 3.04 seconds = 50.72 MB/sec Timing buffered disk reads: 152 MB in 3.00 seconds = 50.65 MB/sec Timing buffered disk reads: 152 MB in 3.03 seconds = 50.10 MB/sec Timing buffered disk reads: 154 MB in 3.04 seconds = 50.71 MB/sec apollo:~ # for (( i=1; i<=10; i++)); do hdparm -t /dev/hdb; sleep 1; done Timing buffered disk reads: 170 MB in 3.01 seconds = 56.55 MB/sec Timing buffered disk reads: 170 MB in 3.00 seconds = 56.59 MB/sec Timing buffered disk reads: 172 MB in 3.03 seconds = 56.71 MB/sec Timing buffered disk reads: 170 MB in 3.02 seconds = 56.27 MB/sec Timing buffered disk reads: 170 MB in 3.02 seconds = 56.25 MB/sec Timing buffered disk reads: 170 MB in 3.00 seconds = 56.63 MB/sec Timing buffered disk reads: 170 MB in 3.01 seconds = 56.53 MB/sec Timing buffered disk reads: 172 MB in 3.03 seconds = 56.75 MB/sec Timing buffered disk reads: 172 MB in 3.03 seconds = 56.73 MB/sec Timing buffered disk reads: 170 MB in 3.01 seconds = 56.44 MB/sec Es sind jeden Tag und zu jeder Zeit dieselben Werte. Martin