Gentoo Archives: gentoo-user

From: Dale <rdalek1967@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Hard drive RPMs and data speed.
Date: Mon, 31 Oct 2011 11:00:02
Message-Id: 4EAE7F62.3000807@gmail.com
In Reply to: Re: [gentoo-user] Hard drive RPMs and data speed. by James Broadhead
1 James Broadhead wrote:
2 > On 27 October 2011 09:15, Dale<rdalek1967@×××××.com> wrote:
3 >> Howdy,
4 >>
5 >> I'm wanting to get a hard drive that is pretty good size. I'm looking for
6 >> about 1 to 2TBs or so. Thing is, a lot of them seem to be 5900 or even 5400
7 >> rpm drives. I realize that the data on there is packed pretty tight so I
8 >> want to ask a few people that may have one or more of these things a few
9 >> questions. Are they as fast as a slower RPM drive? Would they be fast
10 >> enough to play HD videos and such? I have quite a few 1080 HD videos. I
11 >> don't want the drive to cause issues.
12 > Ignoring your question somewhat, since the hdparm test won't actually
13 > get you 'effective' throughput, only 'ideal'.
14 >
15 > ( (4.4*1024*1024*1024) / (120*60) ) / 1024
16 > 640.796
17 >
18 > So a 4.4GiB movie that lasts 2 hours would require a sustained drive
19 > throughput of 640KiB/s - which is pretty achievable.
20 >
21 > My experience says that it doesn't matter how slow a drive you use,
22 > provided that you beef up mplayer's cache size and minimum cache
23 > threshold, since my laptop has a slow drive that likes to power down,
24 > but loads of RAM.
25 >
26 >>> grep cache /etc/mplayer/mplayer.conf
27 > # cache settings
28 > # Use 8MB input cache by default.
29 > cache = 131072
30 > # Prefill 20% of the cache before starting playback.
31 > cache-min = 20.0
32 > # Prefill 50% of the cache before restarting playback after the cache emptied.
33 > cache-seek-min = 50
34 >
35 >
36
37 I have the same here too. Like minds maybe? o_O
38
39 Dale
40
41 :-) :-)

Replies

Subject Author
Re: [gentoo-user] Hard drive RPMs and data speed. James Broadhead <jamesbroadhead@×××××.com>