Archive for the ‘Tulisan Ringan’ Category

Kecepatan Transfer Harddisk SATA

# time rsync -atrv /media/HD1/ /media/HD2/

sent 536590721350 bytes  received 9832345 bytes  60492706.58 bytes/sec
total size is 542353136411  speedup is 1.01

real    147m49.925s
user    71m43.300s
sys    58m15.608s

# time rsync -atrv –progress –stats /media/HD3 /media/HD4

Number of files: 2957
Number of files transferred: 2574
Total file size: 829508518604 bytes
Total transferred file size: 829508518604 bytes
Literal data: 829508518604 bytes
Matched data: 0 bytes
File list size: 83341
File list generation time: 0.001 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 829609967508
Total bytes received: 50450

sent 829609967508 bytes  received 50450 bytes  31480069.74 bytes/sec
total size is 829508518604  speedup is 1.00

real    439m12.535s
user    111m21.071s
sys    91m39.138s

iperf dapat 927 Mbits/sec

Throughput jaringan dapat diukur memakai iperf. Perlu dua komputer, satu sebagai server, satu lagi sebagai client. Secara default iperf belum terpasang di IGOS Nusantara. Instal di komputer server dan client dengan cara:

# yum -y install iperf

Lanjutkan:

$ iperf -s
$ iperf -c 192.168.228.5
——————————

——————————
Client connecting to 192.168.228.5, TCP port 5001
TCP window size: 16.0 KByte (default)
————————————————————
[  3] local 192.168.228.12 port 42440 connected with 192.168.228.5 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.08 GBytes    929 Mbits/sec

$ iperf -s -w 2M -i 1
$ iperf -c 192.168.228.5 -w 2M -i 1
————————————————————
Client connecting to 192.168.228.5, TCP port 5001
TCP window size:   256 KByte (WARNING: requested 2.00 MByte)
————————————————————
[  3] local 192.168.228.12 port 46050 connected with 192.168.228.5 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0- 1.0 sec    110 MBytes    925 Mbits/sec
[  3]  1.0- 2.0 sec    111 MBytes    927 Mbits/sec
[  3]  2.0- 3.0 sec    111 MBytes    928 Mbits/sec
[  3]  3.0- 4.0 sec    111 MBytes    927 Mbits/sec
[  3]  4.0- 5.0 sec    111 MBytes    928 Mbits/sec
[  3]  5.0- 6.0 sec    111 MBytes    930 Mbits/sec
[  3]  6.0- 7.0 sec    111 MBytes    927 Mbits/sec
[  3]  7.0- 8.0 sec    110 MBytes    926 Mbits/sec
[  3]  8.0- 9.0 sec    110 MBytes    927 Mbits/sec
[  3]  9.0-10.0 sec    110 MBytes    926 Mbits/sec
[  3]  0.0-10.0 sec  1.08 GBytes    927 Mbits/sec

Konsumsi Listrik TV LED, LCD, Plasma

Konsumsi Listrik (Power Consumption) TV jenis LED, LCD, Plasma sering ditanyakan calon pembeli TV. Informasi atau komentar yang sering muncul adalah “TV Plasma paling boros listrik”, informasi ini sebagian benar, sebagian lagi tidak akurat. Listrik yang dipakai TV Plasma akan berubah sesuai tampilan gambar. Bila tampilan cerah TV Plasma akan pakai listrik lebih besar, sedangkan bila gambar gelap akan pakai listrik lebih kecil[1].

Berikut daftar konsumsi listrik TV jenis LED, LCD dan Plasma yang dikumpulkan dari berbagai sumber. Sebagian besar diperoleh dari situs produsen TV masing-masing merk.

LG LED:
32LE5500 = 130 Watt
32LE7500 = 130 Watt
42LE4600 = Watt
42LE7500 = 150 Watt
42LE8500 = 160 Watt
55LX9500 = Watt

LG LCD:
26LD345 = 100 Watt
32LD345 = 120 Watt
42LD460 = 190 Watt
47LD460 = 260 Watt
55LD650 = 340 Watt

LG Plasma:
42PJ350 = 160 Watt
42PJ560 = 160 Watt
50PJ350 = 194 Watt
50PJ560 = 194 Watt

Samsung LED:
32C4000 = 100 Watt
32C5000 = 110 Watt
40C5000 = 130 Watt
40C7000 = 150 Watt

Samsung LCD:
22LD345 = 50 Watt
32C530 = 120 Watt
40C530 = 190 Watt
40C550 = 190 Watt
40C650 = 190 Watt

Samsung Plasma:
PS42C430 = 200 Watt
PS42C450 = 240 Watt
PS50C450 = 290 Watt
PS50C550 = 350 Watt

Panasonic LCD:
TH-L32X20 = 93W
TH-L37X20 = 138W

Panasonic Plasma:
TH-P42A20 = 230 Watt
TH-P42X20 = 230 Watt
TH-P46X20 = 250 Watt
TH-P50X20 = 290 Watt

Perbandingan biaya rekening untuk bayar rekening listrik ke PLN antara TV LCD dan TV Plasma yang berbeda 100 watt akan menyebabkan selisih lebih mahal, sebesar 50 sampai 100 ribu rupiah. Informasi lainnya silakan lihat diskusi yang ada di Kaskus[2].

Ref:
[1] Part I: http://kask.us/2098409
[2] Part II: http://kask.us/3244984
http://www.lg.com/in/tv-audio-video/lcd-tv/LG-26LD345.jsp
http://www.lg.com/in/tv-audio-video/lcd-tv/LG-42LD460.jsp
http://www.lg.com/in/tv-audio-video/lcd-tv/LG-47LD460.jsp
http://www.lg.com/in/tv-audio-video/led-lcd-tv/LG-32LE5500.jsp
http://www.directtvs.co.uk/Samsung_PS42C450_42_Inch_Plasma_TV_PS42C450B1WXXU/version.asp
http://www.pcwb.co.uk/catalogue/item/A0545724
http://www.gadgetsguru.com/samsung-ps42c450-lowest-price-spec-cheap-sale-india-9793.aspx
http://www.displayblog.com/2009/05/12/power-consumption-lcd-vs-plasma/
http://reviews.cnet.com/green-tech/tv-consumption-chart/
http://www.world-import.com/Samsung_LA-40c530_Multisystem_LCD_TV.htm