Maker Pro
Maker Pro

I'm designing a Thumb Drive

  • Thread starter www.interfacebus.com
  • Start date
Who manufacturers or sells USB style shells for thumb drives. I've
been looking around but can't find anything.

I'll fab the USB interface and Flash memory on a CCA, but I need a
case to put it in. Who make thos cases? A Plastic or Metal case would
be ok. The more links I get the better. This message was cross-
posted......

http://www.interfacebus.com/http://interfacebus.blogspot.com/http://www.serialphy.com/


If you're gonna do it, make it a form of high art.
http://www.streettech.com/storypics/usbSyringe.jpg

Otherwise, find someone with contacts in China...
 
W

www.interfacebus.com

Jan 1, 1970
0
www.interfacebus.comwrote:

No, it was MULTI-posted.

If it was CROSS-posted, a response in ANY of the places it was posted
would insert an answer in ALL the places it was posted.

I thought Lawrence Smith's response was cool,
but, as others have pointed out, you didn't mention a quantity.

Yes, cross posted. Thank you.

I just want a few. Yea know I'm a bit supprised you can't buy these
things ~ like changing the skin of a phone type of thing.
 
C

ChairmanOfTheBored

Jan 1, 1970
0
I previously asked this question on comp.system.ibm.pc.storage and got
zero answers, but since this newsgroup contains a large number of
computer savvy folk with the right sort of kit and an inclination to
test things as opposed to believing the manufacturers marketting hype.
Here is a repost:


It is NOT "marketing hype", dipshit. There are many many reviews on
the product, AND I own one, and it DOES run JUST THAT FAST.
 
C

ChairmanOfTheBored

Jan 1, 1970
0
The benchmarks that I have found are summarised on Toms Hardware
page:
http://www.tomshardware.co.uk/data-transfer-on-the-run,review-1305-10.html

All of the drives reviewed there are too small for the data I need to
store. My bog standard no-name 1GB manages 12MB/s read rate and that
is too slow for what I want to do. It is also much too small. The seek
time is also important as I expect the vast majority of accesses to be
uncorrelated and random.

I was considering the Corsair 8GB or 16GB basic blue units, but I was
a bit alarmed at the apparently slow ~30ms random access time shown
for their smaller drives cf others like Kingston, Crucial and Memina
in at around <1ms. I have also seen a couple of user reviews where
people said the 16GB unit was much slower than the 8GB - but they may
have been mistaken since others seem not to have a problem.

This isn't for Vista so I don't care at all if the drive is readyboost
compatible or not.

Thanks for any suggestions or enlightenment. I don't like buyng a pig
in poke.

Anyone care to benchmark their thumb drive(s) with hbenchw 3.6 for
read write MB/s and seek time in ms ?

Cheap ones give something like 11 5 1 (read write seek). Really
bad junk ones 4 4 2.

Regards,
Martin Brown


It's the flash voyager GT, idiot, not the standard voyager.

It is a new product, and is NOT listed in Tom's diagram!

There are plenty of real world test reviews by many of the computer
mags out there. Just go look. Sheesh! You obviously didn't look close
enough to see that it is not even the same product as that you gave a
diagram for.
 
C

ChairmanOfTheBored

Jan 1, 1970
0
Who manufacturers or sells USB style shells for thumb drives. I've
been looking around but can't find anything.
I'll fab the USB interface and Flash memory on a CCA, but I need a
case to put it in. Who make thos cases? A Plastic or Metal case would
be ok. The more links I get the better. This message was cross-
posted......

For small quantities, say under 1000 pieces, wouldn't it be cheaper
just to buy the thumb drives from a distributor?

Maybe, but once they make the mold they could also sell the finsihed
product to any one. I have a listing of companies that have completed
the mold and advertise the completed product [not USB]:

http://www.interfacebus.com/plastic_mould_manufacturer.html

I want a USB case. Some companys makes 10,000 a day and sells them. I
want a link that has already done the work and now sells a blank case
~ there most be one out there..................

http://www.interfacebus.com/

I meant the whole thumb drive, not just the case. The market is
already saturated. You can probably buy the whole thing at retail for
less than your parts cost alone.


Absolutely true.

If you are not a BIG, already established manufacturer of electronic
goods, you are not going to get anywhere in this realm.
 
M

Martin Brown

Jan 1, 1970
0
  It is NOT "marketing hype", dipshit.  There are many many reviews on
the product, AND I own one, and it DOES run JUST THAT FAST.

I don't have a problem with the read write speeds for large files. I
can well believe them.

What worries me is that random access speeds shown for the smaller
Corsair products in the only online review made with a reliable
benchmarking tool. I am sure that for large files a GT will max out
around 30+MB/s (and the cheaper one 20MB/s). The big question is what
is their seek time for random access. 30ms is glacially slow!

I want to know the measured seek time for small sector random access.
A number that I have not seen quoted in any reviews online, in the
trade press or in any of the comics. If you can point me at one
reviewing 8GB flash drives properly then I would be very interested. I
am in the UK so US magazines are rare but can be found if necessary.

Failing that how about proving your drive performance with one of the
standard benchmarks :

http://www.storagereview.com/php/tiki/tiki-pagehistory.php?page=Benchmarks&diff=2

h2benchw 3.6 (German magazine) and HDTach 2.xx are both linked from
that page - either would do. The number I am most interested in is the
seek time. Bandwidth for large sequential transfers is not in doubt.

As I pointed out in the original post I was alarmed by the huge
apparent seek times of the smaller Corsair drives and I have not been
able to find any competent reviews at all of larger USB flash drives.
There are endless reviews of classical disk platters (where
manufacturers publish performance & avg seek time anyway). But USB
flash drive manufacturers specs are deliberately vague about these
important parameters.

I am now toying with the idea of putting together an ad hoc RAID0
array using a pair of the cheapest possible USB drives. Effectively
doubling their bandwidth although others trying this approach have
encountered some snags.

Regards,
Martin Brown
 
C

ChairmanOfTheBored

Jan 1, 1970
0
h2benchw 3.6 (German magazine) and HDTach 2.xx are both linked from
that page - either would do


Not true.

H2benchw is.

HDTach is proprietary, and not available, and only points to their
site. (it even says so).

H2Benchw results are: (and my USB 2.0 port is a very early
implementation) Note also that this benchmark is meant for real hard
drives and that the read/write operations performed on USB flash drives
differ from that of the sequencing used on real hard drives, regardless
of file system.

Capacity: CHS=(1007/255/63), 16177455 sectors = 7899 MByte

Interface transfer rate w/ block size 128 sectors at 0.0% of capacity:
Sequential read rate medium (w/out delay): 24185 KByte/s
Sequential transfer rate w/ read-ahead (delay: 2.91 ms): 23365 KByte/s
Repetitive sequential read ("core test"): 24343 KByte/s
Sequential write rate medium (w/out delay): 19985 KByte/s
Sequential transfer rate write cache (delay: 3.52 ms): 20598 KByte/s
Repetitive sequential write: 10124 KByte/s

Sustained transfer rate (block size: 128 sectors):
Reading: average 23852.3, min 23173.4, max 24381.6 [KByte/s]
Writing: average 21728.6, min 12899.1, max 22507.6 [KByte/s]

Random access read: average 0.91, min 0.45, max 2.50 [ms]
Random access write: average 38.04, min 1.38, max 120.98 [ms]
Random access read (<504 MByte): average 0.50, min 0.42, max 0.74 [ms]
Random access write (<504 MByte): average 38.76, min 0.86, max 40.62 [ms]

Application profile `swapping': 7721.0 KByte/s
Application profile `installing': 4859.2 KByte/s
Application profile `Word': 7737.9 KByte/s
Application profile `Photoshop': 6820.3 KByte/s
Application profile `copying': 20020.4 KByte/s
Application profile `F-Prot': 8095.2 KByte/s
Result: application index = 8.1
!!! WARNING: application profiles inaccurate due to small total capacity
Detailed results:
-----------------

Zone measurement read [KByte/s]:

24346.2
24372.0
24334.3
24354.9
24362.5
23637.0
23932.5
24334.8
24354.5
24363.0
24317.2
24335.6
23248.0
24335.5
24362.9
24344.6
24353.7
24353.9
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24381.1
24308.2
24344.7
24381.2
24326.4
24371.3
24336.1
24344.6
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24317.0
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24326.5
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24335.4
24363.0
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24318.1
24353.7
24381.2
24353.5
24372.4
24362.7
24326.4
24363.0
24371.8
24299.4
24335.6
24362.8
24299.1
24362.9
24350.0
24357.5
24372.1
24372.0
24353.7
24353.7
24372.0
24326.4
24362.9
24381.2
24353.7
24353.8
24380.7
24354.2
24362.9
24353.7
24353.8
24362.9
24372.0
24326.4
24362.9
24371.9
24344.7
24372.1
24371.9
24362.9
24362.9
24363.0
24353.7
24353.7
24353.7
24335.6
24353.7
24372.1
24353.6
24372.1
24379.7
24210.1
24335.5
24371.9
24354.0
24353.7
24381.2
24335.6
24371.9
24353.8
24335.4
24381.2
24344.7
24353.8
24361.8
24373.1
24353.8
24372.1
24371.9
24253.9
24371.3
24372.7
24353.6
24353.8
24299.3
24344.7
24353.7
24372.1
24308.2
24353.8
24372.0
24290.0
24363.1
24335.5
24353.8
24353.7
24353.7
24334.4
24354.9
24372.0
24335.5
24372.1
24362.9
24344.7
24362.8
24363.0
24326.4
24353.8
24361.7
24364.1
24353.8
24372.0
24344.8
24353.7
24353.8
24326.5
24362.9
24362.9
24326.4
24362.9
24325.5
24182.4
24354.0
24362.9
24299.2
24335.7
24360.7
24328.7
24362.8
24326.4
24371.7
24354.0
24362.9
24335.6
24344.6
24371.4
24354.3
24353.8
24353.7
24315.2
24356.1
24344.7
24342.9
24355.5
24335.5
24333.9
24300.7
24372.1
24298.6
24363.4
24343.5
24309.3
24344.8
24362.8
24307.6
24326.0
24373.1
24344.6
24372.0
24335.5
24326.5
24353.8
24326.5
24317.3
24353.6
24344.8
24299.2
24362.9
24344.5
24335.6
24353.7
24353.8
24317.4
24335.6
24307.0
24318.1
24381.6
24335.4
24344.6
24381.2
24243.7
24147.0
24308.1
24362.9
24299.3
24335.4
24344.7
24326.5
24334.5
24363.9
24316.2
24364.0
24362.9
24335.5
24362.9
24372.0
24335.6
24381.2
24353.6
24318.2
24372.1
24353.7
24335.6
24372.0
24335.7
24317.1
24353.7
24344.8
23173.4
24371.9
24335.5
24335.6
24344.6
24344.8
24344.6
24353.8
24362.9
24326.4
24371.4
24327.0
24308.3
24353.7
24326.5
24317.2
24381.2
24317.3
24308.3
24371.9
24325.4
24345.7
24353.7
24326.4
24317.4
24353.8
24272.0
24326.3
24353.5
24354.0
24317.4
24344.6
24189.8
24146.4
24363.1
24353.7
24344.8
24353.8
24344.6
24317.5
24344.6
24344.7
24317.3
24344.7
24353.8
24326.5
24353.8
24344.5
24344.7
24372.1
24317.3
24298.6
24336.1
24362.8
24317.4
24372.0
24317.4
24308.2
24372.0
24335.6
24308.2
24371.8
24308.3
24299.3
24353.7
24362.9
24308.2
24344.7
24353.7
24308.3
24335.5
24244.2
24226.3
24363.9
24326.4
24317.3
24335.4
24363.0
24299.2
24335.5
24344.7
24271.9
24308.1
24326.3
24308.5
24362.5
24216.7
24228.2
24353.7
24353.8
24299.1
24344.7
24163.7
24101.0
24362.9
24353.8
24299.1
24344.6
24326.4
24326.5
24362.9
24325.5
24300.2
24362.8
24344.7
24317.4
24308.2
24326.4
24308.2
24353.8
24308.2
24262.9
24326.4
24271.9
24317.4
24372.0
24353.8
24235.7
24344.7
24362.8
24253.8
24353.8
24308.1
24308.3
24344.6
24299.2
24308.2
24335.6
24308.1
24299.4
24353.7
24325.3
24173.9
24353.7
24299.2
24308.2
24344.6
24344.6
24316.4
24336.4
24353.8
24308.2
24326.3
24317.5
24317.4
24317.1
24344.8
24217.8
24308.2
24362.9
24299.1
24335.6
23871.0
24190.7
24326.5
24335.5
24299.3
24353.7
24317.3
24317.4
24344.6
24344.7
24235.7
24316.3
24309.3
24326.4
24317.3
24353.8
24272.0
24326.4
24326.3
24271.9
24308.3
24344.7
24299.2
24335.4
24335.6
24253.9
24335.4
24308.3
24280.9
24344.7
24299.0
24317.4
24353.7
24353.8
24308.2
24317.3
24185.3
24226.9
24190.9
24262.8
24047.7
24217.5
24244.9
24226.7
24199.7
24199.8
24226.7
24271.9
24226.8
24235.7
24299.1
24271.9
24253.8
24281.0
24190.7
24074.3
24217.8
24217.7
24208.6
24199.6
23723.0
24244.9
24172.6
24172.8
24253.8
24172.7
24181.7
24281.1
24217.6
24226.8
24217.7
24244.7
24271.9
24253.9
24262.9
24208.7
24181.6
24234.2
24183.4
24262.8
24297.8
24174.2
24244.8
24272.0
24244.7
24012.0
24299.2
24181.7
24172.7
24262.8
24127.9
24263.0
24253.7
24199.8
24263.0
24262.8
24226.8
24280.9
24127.8
23836.1
24038.6
23967.8
23941.2
23932.5
23941.2
23862.5
23932.4
23958.7
23906.3
23985.4
23941.3
23809.8
24012.0
23897.2
23862.3
23818.5
23958.9
23827.1
23914.9
23627.1
23750.0
23967.8
23888.5
23879.8
24101.0
23941.2
23994.4
24056.3
23941.4
23628.2
24012.0
23906.0
24056.4
24065.4
23906.1
23985.4
23897.2
23757.6
23941.4
23844.7
23809.8
23836.0
23985.2
23923.9
23731.7
23879.7
23888.5
24003.1
23985.4
23818.6
23967.8
23941.0
23915.1
23994.3
23914.8
23853.5
23932.4
23941.4
23985.4
23985.4
23844.8
23748.8
23705.6
23766.3
23653.9
23757.5
23697.0
23671.1
23774.9
23662.4
23645.4
23697.0
23701.9
23494.2
23629.0
23619.0
23723.5
23731.4
23365.0
23723.1
23748.7
23697.0
23792.4
23740.1
23697.0
23688.4
23730.6
23715.2
23602.4
23757.6
23740.2
23783.6
23827.3
23697.0
23748.8
23723.0
23619.6
23844.8
23688.2
23705.6
23714.1
23585.3
23593.9
23653.8
23757.7
23636.7
23766.3
23517.0
23628.1
23835.8
23654.0
23740.2
23766.3
23722.9
23714.3
23653.8
23757.6
23723.1
23645.1
23645.3
23679.7
23740.3
23714.3
23364.9
23348.2
23272.9
23323.0
23289.5
23314.7
23297.9
23297.9
23289.6
23339.7
23322.1
23282.2
23314.6
23329.1
23317.0
23356.4
23298.0
23331.4
23331.3
23356.5
23314.6
23314.6
23289.6
23373.2
23281.3
23323.0
23306.3
23331.3
23281.3
23289.6
23331.3
23306.2
23331.5
23297.7
23322.1
23340.9
23331.3
23356.6
23348.0
23297.9
23347.3
23315.5
23289.6
23323.0
23331.3
23331.4
23314.5
23339.9
23323.3
23331.1
23331.2
23356.6
23356.6
23331.2
23356.6
23348.2
23289.3
23331.6
23331.3
23255.0
23299.3
23281.3
23231.3
23281.2
23273.0
23256.2
23306.4
23297.8
23272.9
23272.8
23255.7
23264.4
23273.9
23289.5
23264.6
23281.3
23281.2
23264.6
23273.0
23264.6
23264.6
23272.8
23264.7
23281.2
23281.2
23256.2
23281.3
23272.8
23214.9
23272.9
23272.9
23272.8
23273.0
23273.0
23248.0
23339.8
23272.9
23264.7
23281.2
23272.8
23273.0
23272.9
23264.7
23264.4
23272.9
23256.3
23289.7
23272.9
23256.3
23272.7
23273.0
23264.6
23272.9
23281.3
23256.3
23289.4
23281.3
23272.9
23272.9
23256.0
23264.9
23272.9
23273.0
23264.6
23264.6
23264.5
23271.9
23298.0
23273.9
23289.6
23273.1
23256.3
23272.8
23281.1
23273.2
23272.9
23272.9
23264.6
23272.8
23280.1
23258.1
23272.9
23263.7
23282.0
23273.1
23264.5
23281.3
23281.3
23264.1
23281.7
23272.9
23256.4
23272.8
23289.6
23264.6
23272.9
23289.6
23264.6
23281.2
23298.0
23264.6
23281.3
23264.6
23281.0
23281.3
23256.4
23272.8
23281.2
23281.1
23281.5
23272.8
23272.9
23281.3
23281.1
23256.4
23272.9
23272.8
23273.1
23281.2
23272.9
23264.6
23298.1
23289.2
23298.3
23271.9
23265.3
23248.2
23286.9
23267.2
23272.0
23273.8
23272.9
23289.7
23264.5
23273.0
23281.2
23306.2
23272.7
23273.2
23272.8
23264.7
23272.9
23279.7
23249.6
23281.3
23272.3
23280.5
23282.6
23189.9
23281.2
23298.1
23272.8
23273.0
23297.8
23264.7
23281.2
23289.6
23256.3
23272.9
23281.1
23272.9
23272.9
23281.3
23289.5
23281.1
23256.4
23289.6
23289.7
23255.9
23289.8
23281.5
23264.3
23273.2
23272.9
23281.2
23289.6
23272.8
23256.4
23281.1
23298.0
23272.8
23281.3
23262.8
23274.7
23281.3
23264.2
23281.6
23306.2
23239.6
23281.3
23272.8
23264.7
23272.9
23297.8
23281.3
23272.9
23272.9
23256.4
23281.3
23272.8
23256.3
23264.6
23281.3
23272.4
23273.4
23271.6
23249.0
23298.0
23273.1
23272.9
23272.9
23256.2
23272.9
23281.3
23256.3
23289.6
23289.5
23263.8
23273.8
23289.6
23264.6
23281.3
23297.9
23256.3
23273.0
23281.2
23264.5
23272.9
23256.4
23289.4
23264.7
23272.9
23297.9
23281.1
23264.8
23272.8
23280.4
23273.8
23281.3
23272.9
23264.6
23281.2
23281.3
23264.6
23264.5
23281.3
23272.9
23264.7
23272.3
23265.2
23289.4
23256.3
23281.3
23281.2
23256.2
23281.4
23264.5
23264.4
23281.4
23272.7
23263.3
23274.3
23281.3
23264.6
23281.2
23306.5
23256.0
23272.9
23280.1
23273.1
23282.2
23256.2
23272.9
23273.0
23256.2
23281.4
23272.6
23256.3
23273.0
23281.2
23273.0
23270.2
23275.6
23264.6
23271.7
23272.9
23257.4
23273.0
23281.1
23256.4
23281.3
23256.2
23281.3
23280.4
23265.4
23297.9
23271.3
23216.4
23289.6
23281.2
23248.0
23272.9
23273.0
23264.6
23272.9
23272.8
23289.7
23281.3
23281.2
23264.6
23281.3
23263.0
23257.8

Zone measurement write [KByte/s]:

16240.2
21865.5
22064.7
21740.0
21747.3
19312.1
14281.7
22109.6
22139.9
22207.7
22034.8
22139.7
16959.9
22132.3
22117.1
21871.1
22087.8
22005.0
22042.2
22019.8
21997.5
22042.2
21982.6
22012.2
21960.2
21982.8
21974.1
21894.9
21923.2
21863.2
21954.1
21827.7
21975.0
21893.8
21791.1
21842.2
21805.7
21791.1
21827.6
21820.1
21733.0
21740.0
21725.6
21791.0
21791.0
21752.2
21720.8
21717.7
21828.3
21718.2
21674.3
21711.6
21730.8
21667.6
21655.1
21689.3
21689.2
21689.4
21652.7
16075.5
21689.3
21646.0
21689.2
21659.5
21799.3
21674.8
21667.5
21660.5
21573.6
21581.9
21674.8
21667.7
21667.6
21689.0
21653.5
21660.4
21653.1
21653.4
21653.1
21638.7
21740.2
21667.5
21653.2
21689.1
21631.7
21624.4
21696.6
21666.6
16056.0
21667.6
21660.3
21667.4
21617.3
21682.2
21646.0
21631.7
21747.2
21682.2
21631.6
21631.5
21631.6
21682.1
21631.5
21653.3
21646.0
21631.5
21609.3
21661.1
21652.8
21660.7
21653.1
21610.1
21732.7
21653.2
21653.2
21718.2
21638.8
21623.3
21675.9
21674.9
21682.0
21595.1
21517.6
21667.5
21667.7
21660.4
21631.6
21638.7
21776.5
21703.7
21638.8
21696.6
21638.7
21689.4
21653.0
21653.4
21667.5
21667.7
21653.2
21667.6
21617.1
21689.2
21681.5
21674.9
21740.7
21703.7
21602.2
21668.3
21645.6
21675.2
21653.2
21660.4
21718.2
21660.4
21646.0
21674.9
21624.3
21631.5
21689.3
21667.7
21638.8
21685.6
21671.2
21660.2
21639.0
21725.5
21674.6
21667.9
21689.3
21667.5
21667.7
21689.2
21653.1
21660.5
15988.1
21617.4
21754.8
21681.9
21689.4
21660.5
21674.8
21703.7
21689.4
21689.2
21769.3
21769.1
21989.0
21741.0
21754.6
21761.8
21718.3
21711.1
21798.3
21674.8
21703.2
21675.4
21689.3
21653.2
21732.7
21638.8
21696.5
21674.9
21791.0
21732.8
21776.5
21740.0
21703.8
21689.0
21784.1
21776.5
21776.5
21798.1
21849.8
21718.1
21820.5
21769.2
21871.7
21864.3
21827.6
21945.5
21901.2
21805.6
21938.1
21960.5
22064.6
21960.3
22034.7
22072.1
21725.6
21997.4
22027.3
22034.6
21997.5
22117.2
22147.3
22087.2
22123.3
22186.5
22192.6
22185.1
22215.5
22154.8
16362.5
22200.3
22147.2
22261.2
22253.4
16946.7
22414.5
22383.7
22430.0
22414.5
22383.7
22360.4
22337.7
22391.4
22507.6
22422.3
22406.8
22399.0
22406.6
22399.2
22392.0
22383.7
22406.7
22414.6
22368.3
22437.7
22422.0
22407.0
22437.7
16537.2
22505.2
22409.2
22414.6
22368.2
22391.2
22414.7
22414.5
22399.0
22368.3
22344.2
22133.3
22414.5
22429.9
22406.8
22422.3
22383.6
22499.9
22437.7
22406.8
22430.1
22422.2
22406.8
22406.8
22276.3
22391.4
22430.0
22391.3
22368.3
22422.2
22399.0
22399.1
22430.0
22499.8
22437.7
22422.3
22376.0
22344.7
22368.7
22352.8
22406.3
22375.9
22368.8
22406.9
22360.6
22383.6
22353.0
22368.2
22368.2
22453.2
22345.3
22368.3
22337.4
22391.4
22399.0
22376.0
22391.4
22399.0
22352.9
22360.6
22368.2
22360.0
22391.8
22383.7
22368.4
22507.6
21982.5
22383.8
22399.1
22375.9
22391.4
22368.2
22352.9
22383.6
22375.9
22376.1
22368.2
22391.4
22405.5
22423.6
22337.5
22484.3
22352.8
22329.9
22399.1
22344.1
22361.7
22376.0
22375.9
22360.5
22391.3
22360.6
22383.7
22132.0
22391.6
22368.3
22374.7
16571.7
22399.1
22368.2
22345.0
22383.9
22352.8
22360.6
22352.9
22352.9
22383.6
22345.1
22360.6
22322.2
22368.4
22360.6
22336.6
22407.6
22360.6
22314.1
22368.5
22376.1
22322.0
22337.1
22208.2
22162.7
22368.2
22329.8
22329.9
22352.9
16503.7
22352.5
22368.4
22453.5
22337.4
22368.3
22299.2
22313.4
22178.0
22345.7
22322.2
22314.6
22345.1
22352.8
22376.0
22368.2
22376.0
22353.0
22375.8
22453.3
22329.8
22306.7
22237.7
22353.5
22322.2
22337.4
22337.6
22383.7
22345.2
22337.6
22322.2
22360.5
22359.9
22345.9
22391.3
22299.2
22329.8
22345.2
22322.1
22306.9
22329.8
22322.2
22360.5
22329.9
22291.6
22345.1
22322.2
22329.7
22337.7
21973.2
22247.8
22422.3
22345.1
22329.9
22322.2
22344.9
22322.4
22314.6
22322.2
22360.5
22314.5
22337.7
22352.8
22094.4
22360.8
22329.9
22299.2
22468.6
22352.9
22306.9
22345.2
22306.9
22337.7
22169.5
21938.5
21827.1
22063.4
21984.3
16482.7
22283.9
22260.8
22208.2
22222.7
22422.4
22314.5
22230.3
22307.1
22291.6
22253.4
22268.7
21922.8
22284.6
22260.9
22200.1
22268.5
22238.6
22223.0
22245.8
22237.6
22338.1
22117.1
22034.7
22094.8
21882.8
21606.3
22072.1
22109.7
22019.8
12899.1
22344.7
22368.2
22345.7
22352.9
22360.5
22321.9
22445.9
22350.0
22112.3
22336.9
22314.7
22353.1
22376.1
22314.3
22357.2
22348.6
22314.5
22352.4
22338.0
22314.5
22337.4
22199.9
22353.4
22352.8
22322.2
22345.2
22352.8
22337.0
22353.4
22383.7
22322.2
22360.6
22360.7
22337.4
22337.5
22072.1
22376.0
22383.7
22422.0
22399.2
22329.9
22325.2
22357.4
22353.0
22287.3
22326.2
22322.3
22342.6
22253.6
21655.5
22352.7
22391.4
22353.1
22306.6
22284.2
22215.3
22230.5
22238.4
22230.6
22215.3
22223.1
22222.8
22170.0
21967.9
22276.2
22251.8
22179.1
22215.4
22192.8
22238.2
22283.8
22245.9
22261.0
16545.7
22240.9
22242.5
21938.7
22162.2
22260.9
22139.6
22200.6
22132.3
22185.1
22139.6
22154.9
22261.2
22261.0
22155.0
22253.4
22215.4
21871.0
22277.0
22192.7
22185.1
22207.8
22185.3
22276.2
22169.9
22162.5
22268.6
22230.3
22193.0
22260.9
21579.7
22096.4
22192.6
22124.8
22192.7
22124.6
22250.9
22210.4
22192.4
22124.9
21537.4
22125.7
22170.0
21681.9
21545.6
21732.8
21667.7
21594.8
21654.0
21581.2
21624.4
21631.6
21624.6
21659.7
21639.5
21610.0
21653.1
21557.9
21633.3
21646.3
21645.8
21754.7
21645.9
21645.9
21631.6
21638.9
21660.4
21638.7
21617.0
21653.3
21673.6
21575.4
21638.7
21646.0
21703.8
21674.8
21617.3
21740.1
21638.5
21631.4
21631.7
21630.0
21633.3
21581.2
21495.3
21646.6
21617.2
21645.9
21609.7
21632.0
21645.8
21667.8
21624.2
21718.3
21602.8
21624.4
21667.6
21544.2
21604.0
21631.1
21574.7
21645.9
21646.0
21638.5
16256.2
21588.6
21645.9
21602.8
21653.3
21710.9
21517.0
21538.4
21595.7
21609.7
21631.9
21586.8
21618.3
21617.9
21588.4
21638.8
21617.1
21624.5
21624.3
21595.3
21560.0
21689.4
21592.5
21642.0
21609.2
21625.1
21631.7
21609.7
21653.6
21631.5
21610.1
21653.1
21545.0
21467.9
21602.9
21602.8
21609.8
21740.1
21588.6
21609.9
21667.5
21636.0
21634.4
21588.3
16299.3
21627.3
21524.3
21617.2
21594.0
21633.1
21617.4
21617.2
21645.9
21711.0
21645.8
21624.1
21631.9
21646.0
21659.1
21589.7
21606.9
21641.6
21639.1
21602.8
21577.9
21613.3
21585.6
21570.0
21595.6
21674.2
21574.8
21588.5
21595.6
21524.0
21588.6
21566.9
21588.6
21595.6
21574.1
21588.5
21552.6
21595.6
21595.6
21574.0
21588.6
21480.2
21461.4
16063.4
21559.5
21595.9
21581.3
21581.3
21581.3
21574.0
21581.4
21552.2
21567.5
21602.8
21552.5
21460.3
21595.2
21624.8
21588.6
21588.4
21588.5
21602.6
21586.9
21575.3
21610.6
21559.9
21588.5
21588.4
21515.3
21590.3
21566.4
21560.1
21574.3
21638.7
21595.7
21610.2
21552.3
21595.3
21567.7
21581.2
21588.5
21530.8
21432.4
21545.6
21531.2
21552.7
21552.7
21552.8
21538.1
21609.8
21560.2
21531.4
21552.6
21559.9
21347.5
21431.0
21546.4
21559.9
21559.7
21538.5
21531.0
21552.6
21530.3
21546.8
21566.3
21617.3
21553.0
21538.6
21481.1
21560.3
21502.8
21531.3
21552.5
21552.8
21567.0
21538.3
21524.3
21538.2
21538.4
21538.6
21538.4
21610.0
21481.4
21545.3
21560.1
21531.2
21538.5
21538.4
21552.5
21531.4
21531.4
21502.7
21559.8
21538.5
21509.9
21474.3
21559.9
16043.6
21552.4
21531.6
21574.0
21552.6
21531.4
21446.0
21531.2
21538.5
21487.5
21355.7
21438.9
21545.7
21524.1
21545.4
21502.4
21632.1
21531.3
21510.0
21552.5
21538.5
21538.4
21552.8
21502.9
21474.3
21545.6
21500.2
21540.6
21531.6
16031.6
21545.7
21531.3
21631.4
21523.9
21531.5
21545.5
21517.1
21467.4
21545.2
21531.6
21538.4
21531.3
21501.1
21540.1
21524.2
21538.4
21536.4
21497.6
21631.6
21523.7
21502.7
21517.5
21516.9
21550.0
21555.4
21531.3
21538.5
21509.8
21517.2
21552.7
21517.0
21538.1
21395.6
21440.1
21574.3
21516.6
21546.0
21517.1
21509.9
21517.1
21524.1
21524.2
21538.3
21531.2
21537.8
21539.0
21517.1
21467.2
21527.7
21513.4
21617.4
21488.6
21538.4
21538.4
21516.9
21552.6
21531.2
21552.4
21539.0
21516.8
21488.7
21538.3
21531.4
21552.8
21502.8
21552.7
21637.8
21531.8
21545.9
21545.2
21524.4
21545.6
21531.2
21552.3
21538.7
21524.3
21552.7
21545.5
21538.4
21545.6
21538.2
21552.6
21631.8
16043.5
21538.3
21424.9
21499.5
21534.6
21531.3
21552.5
21531.4
21552.7
21552.8
21517.1
21544.6
21553.7
21530.8
21553.1
21624.4
21531.2
21495.6

timer resolution: 0.279 µs, 3.580 MHz
timer statistics: 147425878 calls, min 2.23 µs, average 7956.15 µs, max
630121.43 µs
test started: 01-11-08 20:24:40
test version: $Id: h2bench.c,v 3.12 2006/11/24 15:45:09 bo Exp $/Win32
command line: H2BENCHW -a -! -w readwritebench.txt 3

So, if you ask me, even on my slow ports, this is a goddamned fast
drive.
 
M

Martin Brown

Jan 1, 1970
0
  Not true.

  H2benchw is.

  HDTach is proprietary, and not available, and only points to their
site. (it even says so).

Odd. I admit I didn't follow the link, but since early versions of
HDtach are given away on shovelware CDs I had assumed their online
site would also include that basic version. Thanks for posting the
results. Most reassuring!
  H2Benchw results are:  (and my USB 2.0 port is a very early
implementation)  Note also that this benchmark is meant for real hard
drives and that the read/write operations performed on USB flash drives
differ from that of the sequencing used on real hard drives, regardless
of file system.

Indeed, but since it hammers the drive pretty effectively it is a lot
better than trusting the manufacturers figures.
Capacity:   CHS=(1007/255/63), 16177455 sectors = 7899 MByte

Interface transfer rate w/ block size 128 sectors at 0.0% of capacity:
Sequential read rate medium (w/out delay): 24185 KByte/s
Sequential transfer rate w/ read-ahead (delay: 2.91 ms): 23365 KByte/s
Repetitive sequential read ("core test"): 24343 KByte/s
Sequential write rate medium (w/out delay): 19985 KByte/s
Sequential transfer rate write cache (delay: 3.52 ms): 20598 KByte/s
Repetitive sequential write: 10124 KByte/s

And this is for the Corsair GT model with a nominal bandwidth
capability of 30+MB/s?

Tends to suggest your USB 2.0 implementation is throttled back
somewhere. A full link at 480Mbps should be good for nearly 60MB/s
before saturating. Anyone have the basic red Corsair model nominal
20MB/s xfer rate (or even an el cheapo brand) to see how it compares?
Sustained transfer rate (block size: 128 sectors):
Reading:   average 23852.3, min 23173.4, max 24381.6 [KByte/s]
Writing:   average 21728.6, min 12899.1, max 22507.6 [KByte/s]

Random access read:  average 0.91, min 0.45, max 2.50 [ms]
Random access write: average 38.04, min 1.38, max 120.98 [ms]
Random access read (<504 MByte):  average 0.50, min 0.42, max 0.74 [ms]
Random access write (<504 MByte): average 38.76, min 0.86, max 40.62 [ms]

OK. This explains where that long measured seek delay comes from on
his website. Average seek time for random writes is indeed quite a bit
slower than for some other models, but for my application since I am
only ever going to write the data once and sequentially it is
irrelevant. Random access read is sub ms which is exactly what I
wanted to see. Thanks!

NB slow seek could be quite a hit on a Vista readyboost though if
there are too many random writes.
(quite a few USB thumb drives seem incapable of making any improvement
if you have a half decent HD)
Application profile `swapping': 7721.0 KByte/s
Application profile `installing': 4859.2 KByte/s
Application profile `Word': 7737.9 KByte/s
Application profile `Photoshop': 6820.3 KByte/s
Application profile `copying': 20020.4 KByte/s

So chances are 20MB/s is a realistic performance. I wonder if the 16GB
unit is the same speed?

Thanks for your help.
Regards,

Martin Brown
 
M

Martin Brown

Jan 1, 1970
0
Capacity:   CHS=(1007/255/63), 16177455 sectors = 7899 MByte

Interface transfer rate w/ block size 128 sectors at 0.0% of capacity:
Sequential read rate medium (w/out delay): 24185 KByte/s
Sequential transfer rate w/ read-ahead (delay: 2.91 ms): 23365 KByte/s
Repetitive sequential read ("core test"): 24343 KByte/s
Sequential write rate medium (w/out delay): 19985 KByte/s
Sequential transfer rate write cache (delay: 3.52 ms): 20598 KByte/s
Repetitive sequential write: 10124 KByte/s

Sustained transfer rate (block size: 128 sectors):
Reading:   average 23852.3, min 23173.4, max 24381.6 [KByte/s]
Writing:   average 21728.6, min 12899.1, max 22507.6 [KByte/s]

Random access read:  average 0.91, min 0.45, max 2.50 [ms]
Random access write: average 38.04, min 1.38, max 120.98 [ms]
Random access read (<504 MByte):  average 0.50, min 0.42, max 0.74 [ms]
Random access write (<504 MByte): average 38.76, min 0.86, max 40.62 [ms]

I have found one option that is far and away the fastest solution for
8GB solid state (also the most expensive).
Firewire flash media reader and Extreme IV 8GB CF from Sandisk which
can manage a sustained data rate of 40MB/s with roughly similar seek
times. It is surprising how slow SD and other digital media are by
comparison.

Regards,
Martin Brown
 
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