What a difference a good USB Flash Drive makes!!!!!! January 30, 2017 03:29AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 30, 2017 05:34AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 30, 2017 01:41PM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 30, 2017 06:31PM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 03:25AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 03:26AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 03:28AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 04:03AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 05:38AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 05:52AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 06:01AM |
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root@lms:~# hdparm -Tt /dev/sda /dev/sda: Timing cached reads: 526 MB in 2.00 seconds = 262.84 MB/sec Timing buffered disk reads: 86 MB in 3.01 seconds = 28.54 MB/sec root@lms:~# hdparm -Tt /dev/sdb /dev/sdb: Timing cached reads: 528 MB in 2.00 seconds = 263.95 MB/sec Timing buffered disk reads: 86 MB in 3.01 seconds = 28.61 MB/sec ## presumably in cache root@lms:~# dd if=/dev/zero of=/tmp/output bs=8k count=10k; rm /tmp/output 10240+0 records in 10240+0 records out 83886080 bytes (84 MB) copied, 0.296948 s, 282 MB/s root@lms:~# dd if=/dev/zero of=/tmp/output bs=8k count=10k; rm /tmp/output 10240+0 records in 10240+0 records out 83886080 bytes (84 MB) copied, 0.283252 s, 296 MB/s root@lms:~# dd if=/dev/zero of=/tmp/output bs=8k count=10k; rm /tmp/output 10240+0 records in 10240+0 records out 83886080 bytes (84 MB) copied, 0.296076 s, 283 MB/s ## presumably real write root@lms:~# dd if=/dev/zero of=/tmp/output bs=8k count=100k; rm /tmp/output dd: writing `/tmp/output': No space left on device 63186+0 records in 63185+0 records out 517611520 bytes (518 MB) copied, 13.9384 s, 37.1 MB/s root@lms:~# dd if=/dev/zero of=/tmp/output bs=8k count=100k; rm /tmp/output dd: writing `/tmp/output': No space left on device 63186+0 records in 63185+0 records out 517611520 bytes (518 MB) copied, 12.8749 s, 40.2 MB/s ## And now the hdd root@lms:~# dd if=/dev/zero of=/media/Music/output bs=8k count=100k; rm /media/Music/output 102400+0 records in 102400+0 records out 838860800 bytes (839 MB) copied, 42.8752 s, 19.6 MB/s root@lms:~#
Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 06:03AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 06:34AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 06:50AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 06:51AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 11:20AM |
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> root@lms:~# hdparm -Tt /dev/sda > > /dev/sda: > Timing cached reads: 526 MB in 2.00 seconds = 262.84 MB/sec > Timing buffered disk reads: 86 MB in 3.01 seconds = 28.54 MB/sec > > > root@lms:~# hdparm -Tt /dev/sdb > > /dev/sdb: > Timing cached reads: 528 MB in 2.00 seconds = 263.95 MB/sec > Timing buffered disk reads: 86 MB in 3.01 seconds = 28.61 MB/sec >>
On a Linux desktop computer: [root@linux-ackw:/root 80%] # hdparm -Tt /dev/sdh /dev/sdh: Timing cached reads: 2608 MB in 2.00 seconds = 1304.30 MB/sec Timing buffered disk reads: 104 MB in 3.04 seconds = 34.17 MB/sec 0.124u+2.019s=0:16.89e(12.6%) TDSavg=0k+0k+0k max=4216k 226320+17472io 1pf+0sw [root@linux-ackw:/root 81%] # On a Seagate GoFLEX Home: [root@GoFLEX:/root 32%] # hdparm -Tt /dev/sdc /dev/sdc: Timing cached reads: 228 MB in 2.01 seconds = 113.68 MB/sec Timing buffered disk reads: 86 MB in 3.05 seconds = 28.16 MB/sec 0.130u+1.810s=0:14.21e(13.6%) TDSavg=0k+0k+0k max=2944k 0+0io 1pf+0sw [root@GoFLEX:/root 33%] #
> ## presumably in cache > > root@lms:~# dd if=/dev/zero of=/tmp/output bs=8k count=10k; rm /tmp/output > 10240+0 records in > 10240+0 records out > 83886080 bytes (84 MB) copied, 0.296948 s, 282 MB/s >>
# dd if=/dev/zero of=/tmp/output bs=8k count=10k conv=fsync; rm /tmp/output
Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 11:53AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 04:07PM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 10:11PM |
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Re: What a difference a good USB Flash Drive makes!!!!!! January 31, 2017 11:05PM |
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Re: What a difference a good USB Flash Drive makes!!!!!! February 02, 2017 06:18AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! February 02, 2017 07:11AM |
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Re: What a difference a good USB Flash Drive makes!!!!!! February 02, 2017 09:55AM |
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