Re: [LAU] Hard drive for "/" should be also 7200 rpm?

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 02/19/2012 09:56 PM, Yosef Werner wrote: Hi Yosef, I short: No. The system disk is completely irrelevant for audio-perfomance. Your system will start faster with a 7200rpm disk mounted on root compared to a 5200rpm drive of the same size but it has no impact on jack's performance. In fact the JACK x-runs are completely independent from any disk (even the disk where your audio-data resides). I/O is never done in the jack [real-time] context. The jack-application (ardour, qtractor, jack_capture,..) will stutter with with a message "Your disk is too slow!" if it can not read/write fast enough [and the memory-buffers/cache are full]. It won't however cause x-runs (other jack applications will meanwhile continue just fine). Generally, HDD seek-speed is not very important for reading/writing audio files. As Harry noted: most DAWs do buffer a few seconds of audio. A somewhat conservative value: HDD reads/write speed ~20 Mbytes/sec: 20 [MB/s] / 4 [bytes/sample] / 44100 [samples/second] = 118 [channels] That's the theoretical maximum; yet real values are close to that. You can measuere the speed and throughput of your disk width `hdparm - -t`; or simply by copying a file while watching `dstat -D sda,sdb`. HTH, robin