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STORAGE: benchmarks results (diskinfo)
I would like to start a thread to compare performance of various storage sollutions using FreeBSD diskinfo(8) tool.
I also encourage to post results of other benchamrking tools. Here are mine results for the start: Kingston DT100 16GB (pendrive): Code:
# diskinfo -c -t /dev/da0 /dev/da0 512 # sectorsize 16131293184 # mediasize in bytes (15G) 31506432 # mediasize in sectors 1961 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. I/O command overhead: time to read 10MB block 0.617194 sec = 0.030 msec/sector time to read 20480 sectors 15.450024 sec = 0.754 msec/sector calculated command overhead = 0.724 msec/sector Seek times: Full stroke: 250 iter in 0.251563 sec = 1.006 msec Half stroke: 250 iter in 1.053088 sec = 4.212 msec Quarter stroke: 500 iter in 0.499425 sec = 0.999 msec Short forward: 400 iter in 0.300996 sec = 0.752 msec Short backward: 400 iter in 0.303678 sec = 0.759 msec Seq outer: 2048 iter in 1.536665 sec = 0.750 msec Seq inner: 2048 iter in 1.548363 sec = 0.756 msec Transfer rates: outside: 102400 kbytes in 5.749353 sec = 17811 kbytes/sec middle: 102400 kbytes in 3.553501 sec = 28817 kbytes/sec inside: 102400 kbytes in 3.547978 sec = 28862 kbytes/sec Code:
# diskinfo -t -c /dev/ad4 /dev/ad4 512 # sectorsize 80026361856 # mediasize in bytes (75G) 156301488 # mediasize in sectors 155061 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. ad:5NH0MD7M # Disk ident. I/O command overhead: time to read 10MB block 0.190977 sec = 0.009 msec/sector time to read 20480 sectors 3.132845 sec = 0.153 msec/sector calculated command overhead = 0.144 msec/sector Seek times: Full stroke: 250 iter in 5.959489 sec = 23.838 msec Half stroke: 250 iter in 4.147395 sec = 16.590 msec Quarter stroke: 500 iter in 6.506640 sec = 13.013 msec Short forward: 400 iter in 1.602929 sec = 4.007 msec Short backward: 400 iter in 2.285750 sec = 5.714 msec Seq outer: 2048 iter in 0.413902 sec = 0.202 msec Seq inner: 2048 iter in 0.372223 sec = 0.182 msec Transfer rates: outside: 102400 kbytes in 1.739364 sec = 58872 kbytes/sec middle: 102400 kbytes in 2.157085 sec = 47471 kbytes/sec inside: 102400 kbytes in 3.405393 sec = 30070 kbytes/sec Seagate 7200.7 8MB 80GB PATA [ST380011A] (3.5 disk): Code:
# diskinfo -t -c /dev/ad0 /dev/ad0 512 # sectorsize 80026361856 # mediasize in bytes (75G) 156301488 # mediasize in sectors 155061 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. ad:5JVK88WT # Disk ident. I/O command overhead: time to read 10MB block 0.196956 sec = 0.010 msec/sector time to read 20480 sectors 2.342352 sec = 0.114 msec/sector calculated command overhead = 0.105 msec/sector Seek times: Full stroke: 250 iter in 5.613326 sec = 22.453 msec Half stroke: 250 iter in 4.320666 sec = 17.283 msec Quarter stroke: 500 iter in 6.948839 sec = 13.898 msec Short forward: 400 iter in 2.039787 sec = 5.099 msec Short backward: 400 iter in 1.404436 sec = 3.511 msec Seq outer: 2048 iter in 0.246837 sec = 0.121 msec Seq inner: 2048 iter in 0.256757 sec = 0.125 msec Transfer rates: outside: 102400 kbytes in 1.793044 sec = 57110 kbytes/sec middle: 102400 kbytes in 2.235812 sec = 45800 kbytes/sec inside: 102400 kbytes in 3.437295 sec = 29791 kbytes/sec
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religions, worst damnation of mankind "If 386BSD had been available when I started on Linux, Linux would probably never had happened." Linus Torvalds Linux is not UNIX! Face it! It is not an insult. It is fact: GNU is a recursive acronym for “GNU's Not UNIX”. vermaden's: links resources deviantart spreadbsd |
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Seagate 15K.3 (SCSI) drive, about five years old:
Code:
pinot# diskinfo -c -t /dev/da0 /dev/da0 512 # sectorsize 36703934464 # mediasize in bytes (34G) 71687372 # mediasize in sectors 4462 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. I/O command overhead: time to read 10MB block 0.143325 sec = 0.007 msec/sector time to read 20480 sectors 4.014771 sec = 0.196 msec/sector calculated command overhead = 0.189 msec/sector Seek times: Full stroke: 250 iter in 2.194760 sec = 8.779 msec Half stroke: 250 iter in 1.737971 sec = 6.952 msec Quarter stroke: 500 iter in 2.936857 sec = 5.874 msec Short forward: 400 iter in 1.671453 sec = 4.179 msec Short backward: 400 iter in 0.840368 sec = 2.101 msec Seq outer: 2048 iter in 0.243329 sec = 0.119 msec Seq inner: 2048 iter in 0.247530 sec = 0.121 msec Transfer rates: outside: 102400 kbytes in 1.402288 sec = 73024 kbytes/sec middle: 102400 kbytes in 1.568473 sec = 65286 kbytes/sec inside: 102400 kbytes in 2.133166 sec = 48004 kbytes/sec |
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Seagate 15K.4 (SCSI), about 4 years old:
Code:
pinot# diskinfo -c -t /dev/da1 /dev/da1 512 # sectorsize 36703934464 # mediasize in bytes (34G) 71687372 # mediasize in sectors 4462 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. I/O command overhead: time to read 10MB block 0.141310 sec = 0.007 msec/sector time to read 20480 sectors 4.005664 sec = 0.196 msec/sector calculated command overhead = 0.189 msec/sector Seek times: Full stroke: 250 iter in 2.293915 sec = 9.176 msec Half stroke: 250 iter in 1.676370 sec = 6.705 msec Quarter stroke: 500 iter in 2.717760 sec = 5.436 msec Short forward: 400 iter in 1.457543 sec = 3.644 msec Short backward: 400 iter in 0.886641 sec = 2.217 msec Seq outer: 2048 iter in 0.392236 sec = 0.192 msec Seq inner: 2048 iter in 0.540832 sec = 0.264 msec Transfer rates: outside: 102400 kbytes in 1.098587 sec = 93211 kbytes/sec middle: 102400 kbytes in 1.232444 sec = 83087 kbytes/sec inside: 102400 kbytes in 1.892680 sec = 54103 kbytes/sec |
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Maxtor 10K5 (SCSI) about three years old:
Code:
pinot# diskinfo -c -t /dev/da2 /dev/da2 512 # sectorsize 73557090304 # mediasize in bytes (69G) 143666192 # mediasize in sectors 8942 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. I/O command overhead: time to read 10MB block 0.126083 sec = 0.006 msec/sector time to read 20480 sectors 3.888857 sec = 0.190 msec/sector calculated command overhead = 0.184 msec/sector Seek times: Full stroke: 250 iter in 2.713510 sec = 10.854 msec Half stroke: 250 iter in 2.131789 sec = 8.527 msec Quarter stroke: 500 iter in 3.611677 sec = 7.223 msec Short forward: 400 iter in 1.719398 sec = 4.298 msec Short backward: 400 iter in 1.151218 sec = 2.878 msec Seq outer: 2048 iter in 0.601458 sec = 0.294 msec Seq inner: 2048 iter in 3.763039 sec = 1.837 msec Transfer rates: outside: 102400 kbytes in 1.217299 sec = 84121 kbytes/sec middle: 102400 kbytes in 1.422332 sec = 71994 kbytes/sec inside: 102400 kbytes in 2.195861 sec = 46633 kbytes/sec |
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Maxtor 15K2 (SCSI), also about three years old.
Code:
diskinfo -c -t /dev/da0 /dev/da0 512 # sectorsize 73557090304 # mediasize in bytes (69G) 143666192 # mediasize in sectors 8942 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. I/O command overhead: time to read 10MB block 0.115576 sec = 0.006 msec/sector time to read 20480 sectors 2.665809 sec = 0.130 msec/sector calculated command overhead = 0.125 msec/sector Seek times: Full stroke: 250 iter in 1.931961 sec = 7.728 msec Half stroke: 250 iter in 1.526477 sec = 6.106 msec Quarter stroke: 500 iter in 2.579356 sec = 5.159 msec Short forward: 400 iter in 1.369708 sec = 3.424 msec Short backward: 400 iter in 1.230223 sec = 3.076 msec Seq outer: 2048 iter in 0.219476 sec = 0.107 msec Seq inner: 2048 iter in 2.323221 sec = 1.134 msec Transfer rates: outside: 102400 kbytes in 1.088818 sec = 94047 kbytes/sec middle: 102400 kbytes in 1.177631 sec = 86954 kbytes/sec inside: 102400 kbytes in 1.517659 sec = 67472 kbytes/sec Last edited by DrJ; 13th November 2008 at 02:03 AM. |
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Cruzer Micro 2 GB USB stick:
Code:
da0 at umass-sim0 bus 0 target 0 lun 0 da0: <SanDisk U3 Cruzer Micro 2.18> Removable Direct Access SCSI-2 device da0: 40.000MB/s transfers da0: 1959MB (4013713 512 byte sectors: 255H 63S/T 249C) Code:
# diskinfo -c -t /dev/da0 Password: /dev/da0 512 # sectorsize 2055021056 # mediasize in bytes (1.9G) 4013713 # mediasize in sectors 249 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. I/O command overhead: time to read 10MB block 0.604066 sec = 0.029 msec/sector time to read 20480 sectors 20.573283 sec = 1.005 msec/sector calculated command overhead = 0.975 msec/sector Seek times: Full stroke: 250 iter in 0.254135 sec = 1.017 msec Half stroke: diskinfo: read error or disk too small for test.: Input/output error |
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I have three of these drives in my home system. The results are within 3% of each other for all three. So I've only posted the data from one:
Code:
ad4: detached ad4: 152627MB <WDC WD1600JS-56MHB1 10.02E01> at ata2-master SATA150 ad4: 152627MB <WDC WD1600JS-56MHB1 10.02E01> at ata2-master SATA150 Code:
# diskinfo -c -t /dev/ad4 /dev/ad4 512 # sectorsize 160041885696 # mediasize in bytes (149G) 312581808 # mediasize in sectors 310101 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. ad:WD-WCANMD687666 # Disk ident. I/O command overhead: time to read 10MB block 0.465710 sec = 0.023 msec/sector time to read 20480 sectors 1.906245 sec = 0.093 msec/sector calculated command overhead = 0.070 msec/sector Seek times: Full stroke: 250 iter in 5.352183 sec = 21.409 msec Half stroke: 250 iter in 3.744667 sec = 14.979 msec Quarter stroke: 500 iter in 6.328028 sec = 12.656 msec Short forward: 400 iter in 1.750907 sec = 4.377 msec Short backward: 400 iter in 2.813370 sec = 7.033 msec Seq outer: 2048 iter in 0.463089 sec = 0.226 msec Seq inner: 2048 iter in 0.216843 sec = 0.106 msec Transfer rates: outside: 102400 kbytes in 1.736854 sec = 58957 kbytes/sec middle: 102400 kbytes in 1.900757 sec = 53873 kbytes/sec inside: 102400 kbytes in 3.323692 sec = 30809 kbytes/sec |
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2 GB CompactFlash card in an CF-to-IDE adapter on our backup server at work:
Code:
ad0: 1911MB <TRANSCEND 20080128> at ata0-master PIO4 Code:
# diskinfo -c -t /dev/ad0 /dev/ad0 512 # sectorsize 2004516864 # mediasize in bytes (1.9G) 3915072 # mediasize in sectors 3884 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. ad:20080611x2000001097 # Disk ident. I/O command overhead: time to read 10MB block 2.514791 sec = 0.123 msec/sector time to read 20480 sectors 5.389585 sec = 0.263 msec/sector calculated command overhead = 0.140 msec/sector Seek times: Full stroke: 250 iter in 0.071261 sec = 0.285 msec Half stroke: diskinfo: read error or disk too small for test.: Input/output error |
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One of the WD 500 GB SATA300 drives in our mega backup server (there are 12 of them):
Code:
da20 at twa1 bus 0 target 8 lun 0 da20: <AMCC 9650SE-12M DISK 3.06> Fixed Direct Access SCSI-5 device da20: 100.000MB/s transfers da20: 476827MB (976541696 512 byte sectors: 255H 63S/T 60786C) Code:
# diskinfo -c -t /dev/da20 /dev/da20 512 # sectorsize 499989348352 # mediasize in bytes (466G) 976541696 # mediasize in sectors 60786 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. I/O command overhead: time to read 10MB block 0.153450 sec = 0.007 msec/sector time to read 20480 sectors 3.595345 sec = 0.176 msec/sector calculated command overhead = 0.168 msec/sector Seek times: Full stroke: 250 iter in 5.354324 sec = 21.417 msec Half stroke: 250 iter in 3.947506 sec = 15.790 msec Quarter stroke: 500 iter in 6.297917 sec = 12.596 msec Short forward: 400 iter in 2.546029 sec = 6.365 msec Short backward: 400 iter in 2.247438 sec = 5.619 msec Seq outer: 2048 iter in 0.420714 sec = 0.205 msec Seq inner: 2048 iter in 0.380689 sec = 0.186 msec Transfer rates: outside: 102400 kbytes in 1.302843 sec = 78597 kbytes/sec middle: 102400 kbytes in 1.497861 sec = 68364 kbytes/sec inside: 102400 kbytes in 2.729925 sec = 37510 kbytes/sec Code:
da2 at twa0 bus 0 target 2 lun 0 da2: <AMCC 9550SXU-16 DISK 3.04> Fixed Direct Access SCSI-3 device da2: 100.000MB/s transfers da2: 381459MB (781228032 512 byte sectors: 255H 63S/T 48629C) Code:
# diskinfo -c -t /dev/da2 /dev/da2 512 # sectorsize 399988752384 # mediasize in bytes (373G) 781228032 # mediasize in sectors 48629 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. I/O command overhead: time to read 10MB block 0.174597 sec = 0.009 msec/sector time to read 20480 sectors 2.579550 sec = 0.126 msec/sector calculated command overhead = 0.117 msec/sector Seek times: Full stroke: 250 iter in 5.532021 sec = 22.128 msec Half stroke: 250 iter in 3.820743 sec = 15.283 msec Quarter stroke: 500 iter in 6.219938 sec = 12.440 msec Short forward: 400 iter in 2.524233 sec = 6.311 msec Short backward: 400 iter in 1.803372 sec = 4.508 msec Seq outer: 2048 iter in 0.288372 sec = 0.141 msec Seq inner: 2048 iter in 0.303830 sec = 0.148 msec Transfer rates: outside: 102400 kbytes in 1.704879 sec = 60063 kbytes/sec middle: 102400 kbytes in 1.751955 sec = 58449 kbytes/sec inside: 102400 kbytes in 2.792769 sec = 36666 kbytes/sec |
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Here is mine
Code:
ad12: 152627MB <GB0160CAABV HPG1> at ata6-master SATA150 > sudo diskinfo -t -c /dev/ad12 Password: /dev/ad12 512 # sectorsize 160041885696 # mediasize in bytes (149G) 312581808 # mediasize in sectors 310101 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. ad:6RX4KZRZ # Disk ident. I/O command overhead: time to read 10MB block 0.150498 sec = 0.007 msec/sector time to read 20480 sectors 2.125652 sec = 0.104 msec/sector calculated command overhead = 0.096 msec/sector Seek times: Full stroke: 250 iter in 6.223675 sec = 24.895 msec Half stroke: 250 iter in 4.319212 sec = 17.277 msec Quarter stroke: 500 iter in 6.789967 sec = 13.580 msec Short forward: 400 iter in 2.002273 sec = 5.006 msec Short backward: 400 iter in 1.881687 sec = 4.704 msec Seq outer: 2048 iter in 0.426395 sec = 0.208 msec Seq inner: 2048 iter in 0.438380 sec = 0.214 msec Transfer rates: outside: 102400 kbytes in 1.479959 sec = 69191 kbytes/sec middle: 102400 kbytes in 1.766187 sec = 57978 kbytes/sec inside: 102400 kbytes in 3.260754 sec = 31404 kbytes/sec |
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ad0: 76319MB <WDC WD800JB-00JJC0 05.01C05> at ata0-master UDMA100
Code:
/dev/ad0 512 # sectorsize 80026361856 # mediasize in bytes (75G) 156301488 # mediasize in sectors 155061 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. ad:WD-WCAM9V946444 # Disk ident. I/O command overhead: time to read 10MB block 0.185617 sec = 0.009 msec/sector time to read 20480 sectors 2.065096 sec = 0.101 msec/sector calculated command overhead = 0.092 msec/sector Seek times: Full stroke: 250 iter in 5.380797 sec = 21.523 msec Half stroke: 250 iter in 3.830487 sec = 15.322 msec Quarter stroke: 500 iter in 6.384590 sec = 12.769 msec Short forward: 400 iter in 2.258881 sec = 5.647 msec Short backward: 400 iter in 2.426586 sec = 6.066 msec Seq outer: 2048 iter in 0.233361 sec = 0.114 msec Seq inner: 2048 iter in 0.234686 sec = 0.115 msec Transfer rates: outside: 102400 kbytes in 1.800840 sec = 56862 kbytes/sec middle: 102400 kbytes in 1.951145 sec = 52482 kbytes/sec inside: 102400 kbytes in 3.060375 sec = 33460 kbytes/sec |
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ad8: 114473MB <Seagate ST9120823AS 3.AHE> at ata4-master SATA300
Code:
/dev/ad8 512 # sectorsize 120034123776 # mediasize in bytes (112G) 234441648 # mediasize in sectors 232581 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. ad:5NJ185HQ # Disk ident. I/O command overhead: time to read 10MB block 0.260630 sec = 0.013 msec/sector time to read 20480 sectors 1.152744 sec = 0.056 msec/sector calculated command overhead = 0.044 msec/sector Seek times: Full stroke: 250 iter in 6.008694 sec = 24.035 msec Half stroke: 250 iter in 4.085139 sec = 16.341 msec Quarter stroke: 500 iter in 6.405515 sec = 12.811 msec Short forward: 400 iter in 1.810569 sec = 4.526 msec Short backward: 400 iter in 1.762313 sec = 4.406 msec Seq outer: 2048 iter in 0.224249 sec = 0.109 msec Seq inner: 2048 iter in 0.147590 sec = 0.072 msec Transfer rates: outside: 102400 kbytes in 1.727682 sec = 59270 kbytes/sec middle: 102400 kbytes in 2.047073 sec = 50023 kbytes/sec inside: 102400 kbytes in 3.137049 sec = 32642 kbytes/sec |
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Code:
ad0: 8192MB <VMware Virtual IDE Hard Drive 00000001> at ata0-master UDMA33 (Vmware WS6 / Vista / NTFS / ST3320820AS) /dev/ad0 512 # sectorsize 8589934592 # mediasize in bytes (8.0G) 16777216 # mediasize in sectors 17753 # Cylinders according to firmware. 15 # Heads according to firmware. 63 # Sectors according to firmware. ad:00000000000000000001 # Disk ident. I/O command overhead: time to read 10MB block 0.216514 sec = 0.011 msec/sector time to read 20480 sectors 2.498505 sec = 0.122 msec/sector calculated command overhead = 0.111 msec/sector Seek times: Full stroke: 250 iter in 1.246622 sec = 4.986 msec Half stroke: 250 iter in 1.235733 sec = 4.943 msec Quarter stroke: 500 iter in 1.536449 sec = 3.073 msec Short forward: 400 iter in 1.681248 sec = 4.203 msec Short backward: 400 iter in 1.448493 sec = 3.621 msec Seq outer: 2048 iter in 0.336718 sec = 0.164 msec Seq inner: 2048 iter in 0.275455 sec = 0.134 msec Transfer rates: outside: 102400 kbytes in 1.967604 sec = 52043 kbytes/sec middle: 102400 kbytes in 0.463944 sec = 220716 kbytes/sec inside: 102400 kbytes in 0.270255 sec = 378901 kbytes/sec |
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Yes, but your results are from Virtual image on disk within wirtualization, You wil ALWAYS get "strange" results about disk performance when you use disk in a file for your virtualized OS, I also got strange and realtively faster results then the drive can do even in slower QEMU.
__________________
religions, worst damnation of mankind "If 386BSD had been available when I started on Linux, Linux would probably never had happened." Linus Torvalds Linux is not UNIX! Face it! It is not an insult. It is fact: GNU is a recursive acronym for “GNU's Not UNIX”. vermaden's: links resources deviantart spreadbsd |
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Quote:
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ad0: 9641MB <QUANTUM FIREBALLlct15 10 A01.0F00> at ata0-master UDMA66
Code:
ad0 512 # sectorsize 10110320640 # mediasize in bytes (9.4G) 19746720 # mediasize in sectors 19590 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. I/O command overhead: time to read 10MB block 1.626129 sec = 0.079 msec/sector time to read 20480 sectors 6.490175 sec = 0.317 msec/sector calculated command overhead = 0.238 msec/sector Seek times: Full stroke: 250 iter in 5.547643 sec = 22.191 msec Half stroke: 250 iter in 4.592802 sec = 18.371 msec Quarter stroke: 500 iter in 8.084585 sec = 16.169 msec Short forward: 400 iter in 3.304525 sec = 8.261 msec Short backward: 400 iter in 3.932657 sec = 9.832 msec Seq outer: 2048 iter in 0.381241 sec = 0.186 msec Seq inner: 2048 iter in 0.380521 sec = 0.186 msec Transfer rates: outside: 102400 kbytes in 16.241850 sec = 6305 kbytes/sec middle: 102400 kbytes in 16.241759 sec = 6305 kbytes/sec inside: 102400 kbytes in 16.240737 sec = 6305 kbytes/sec |
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Quote:
check it out for yourself. The fantastic scores i was getting were bogus. i think its because of 2 factors: 1. The virtual disk was not preallocated so there is some kind of COW mechanism going on here though i don't know the details. This layer of abstraction was i believe causing the skewed result. 2. The disk is too small so the f, q, h stoke readings have no meaning here. here is the o/p with a preallocated disk. this is more in line with what one would expect: Code:
/dev/ad1 512 # sectorsize 8589934592 # mediasize in bytes (8.0G) 16777216 # mediasize in sectors 17753 # Cylinders according to firmware. 15 # Heads according to firmware. 63 # Sectors according to firmware. ad:01000000000000000001 # Disk ident. I/O command overhead: time to read 10MB block 0.192098 sec = 0.009 msec/sector time to read 20480 sectors 2.492608 sec = 0.122 msec/sector calculated command overhead = 0.112 msec/sector Seek times: Full stroke: 250 iter in 2.628599 sec = 10.514 msec Half stroke: 250 iter in 2.394040 sec = 9.576 msec Quarter stroke: 500 iter in 3.194460 sec = 6.389 msec Short forward: 400 iter in 3.233777 sec = 8.084 msec Short backward: 400 iter in 3.047335 sec = 7.618 msec Seq outer: 2048 iter in 0.335767 sec = 0.164 msec Seq inner: 2048 iter in 0.335223 sec = 0.164 msec Transfer rates: outside: 102400 kbytes in 1.474514 sec = 69447 kbytes/sec middle: 102400 kbytes in 1.627657 sec = 62913 kbytes/sec inside: 102400 kbytes in 1.558496 sec = 65704 kbytes/sec the transfer rates are more or less the same, as expected. also, I would expect the COW results to degenerate to the above values when the disk becomes full. Last edited by ephemera; 13th November 2008 at 06:49 PM. |
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Quote:
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ad4: 114473MB <Seagate ST3120022A 3.04> at ata2-master UDMA100
Code:
/dev/ad4 512 # sectorsize 120034123776 # mediasize in bytes (112G) 234441648 # mediasize in sectors 232581 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. ad:3JT03PGJ # Disk ident. I/O command overhead: time to read 10MB block 0.254739 sec = 0.012 msec/sector time to read 20480 sectors 9.037125 sec = 0.441 msec/sector calculated command overhead = 0.429 msec/sector Seek times: Full stroke: 250 iter in 5.730336 sec = 22.921 msec Half stroke: 250 iter in 4.476435 sec = 17.906 msec Quarter stroke: 500 iter in 7.122016 sec = 14.244 msec Short forward: 400 iter in 2.161611 sec = 5.404 msec Short backward: 400 iter in 1.193050 sec = 2.983 msec Seq outer: 2048 iter in 0.932468 sec = 0.455 msec Seq inner: 2048 iter in 0.942871 sec = 0.460 msec Transfer rates: outside: 102400 kbytes in 1.964194 sec = 52133 kbytes/sec middle: 102400 kbytes in 2.175116 sec = 47078 kbytes/sec inside: 102400 kbytes in 3.431121 sec = 29844 kbytes/sec Code:
/dev/ad10 512 # sectorsize 1000204886016 # mediasize in bytes (932G) 1953525168 # mediasize in sectors 1938021 # Cylinders according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. ad:S13PJ1MQ602787 # Disk ident. I/O command overhead: time to read 10MB block 0.180889 sec = 0.009 msec/sector time to read 20480 sectors 9.345026 sec = 0.456 msec/sector calculated command overhead = 0.447 msec/sector Seek times: Full stroke: 250 iter in 6.147410 sec = 24.590 msec Half stroke: 250 iter in 4.646249 sec = 18.585 msec Quarter stroke: 500 iter in 8.820316 sec = 17.641 msec Short forward: 400 iter in 1.664426 sec = 4.161 msec Short backward: 400 iter in 2.615189 sec = 6.538 msec Seq outer: 2048 iter in 0.996294 sec = 0.486 msec Seq inner: 2048 iter in 0.995813 sec = 0.486 msec Transfer rates: outside: 102400 kbytes in 1.647798 sec = 62144 kbytes/sec middle: 102400 kbytes in 1.619156 sec = 63243 kbytes/sec inside: 102400 kbytes in 1.930229 sec = 53051 kbytes/sec Last edited by tangram; 13th November 2008 at 04:35 PM. Reason: Added another disk to the mix. |
Tags |
benchmark, diskinfo |
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