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Odd speeds SSDFlash_Drv
To the USB flash drive, penstick, I'm getting CD speeds -- 3000 Kbtyes
-- _from_ the SSD. Anything else is about SSD class. HDs inherently set their own limits to the SSD, whereas the SSD to HD is 2, x3 faster than HD-to-HD. Messed up situation in getting off the SSD, to the USBflash stick, for sure, 3, x4 slower than if going similarly off a HD to the same stick. Newfangled Intel USB2 ports, new to me, but a damn sight better w/ a slow SDD one-way-trip, overall, than driver problem limits at USB1 I had to get over. No problems w/ 3.5" docking stations, either. |
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Odd speeds SSDFlash_Drv
Flasherly wrote:
To the USB flash drive, penstick, I'm getting CD speeds -- 3000 Kbtyes -- _from_ the SSD. Anything else is about SSD class. HDs inherently set their own limits to the SSD, whereas the SSD to HD is 2, x3 faster than HD-to-HD. Messed up situation in getting off the SSD, to the USBflash stick, for sure, 3, x4 slower than if going similarly off a HD to the same stick. Newfangled Intel USB2 ports, new to me, but a damn sight better w/ a slow SDD one-way-trip, overall, than driver problem limits at USB1 I had to get over. No problems w/ 3.5" docking stations, either. Run a read benchmark with HDTune, on each device. http://www.hdtune.com/files/hdtune_255.exe Is any bottleneck evident ? Is either device slow then ? Both SSD drives and USB flash sticks, will have a flat line for the benchmark curve. The USB2 interface, has a roughly 30MB/sec upper limit, which for some USB flash sticks, will limit the rate they can transfer. There are some very bad USB flash sticks for sale at retail. I have a Sandisk Ultra 8GB I bought this year, that only does 2 or 3MB/sec. Pathetic. The LED inside, flashes at an irregular rate when it is operating. The controller seems to be a seriously bad design. I should really crush it with a hammer, and have a look inside... Paul |
#3
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Odd speeds SSDFlash_Drv
On Sat, 08 Jun 2013 15:56:41 -0400, Paul wrote:
Flasherly wrote: To the USB flash drive, penstick, I'm getting CD speeds -- 3000 Kbtyes -- _from_ the SSD. Anything else is about SSD class. HDs inherently set their own limits to the SSD, whereas the SSD to HD is 2, x3 faster than HD-to-HD. Messed up situation in getting off the SSD, to the USBflash stick, for sure, 3, x4 slower than if going similarly off a HD to the same stick. Newfangled Intel USB2 ports, new to me, but a damn sight better w/ a slow SDD one-way-trip, overall, than driver problem limits at USB1 I had to get over. No problems w/ 3.5" docking stations, either. Run a read benchmark with HDTune, on each device. http://www.hdtune.com/files/hdtune_255.exe Is any bottleneck evident ? Is either device slow then ? Both SSD drives and USB flash sticks, will have a flat line for the benchmark curve. The USB2 interface, has a roughly 30MB/sec upper limit, which for some USB flash sticks, will limit the rate they can transfer. There are some very bad USB flash sticks for sale at retail. I have a Sandisk Ultra 8GB I bought this year, that only does 2 or 3MB/sec. Pathetic. The LED inside, flashes at an irregular rate when it is operating. The controller seems to be a seriously bad design. I should really crush it with a hammer, and have a look inside... Nope, neither is notably in the Class Draggin-Butt Slow -except- for that one instance of coming off the SSD to a USB memory pendrive (slows to average 3-4, maybe 5 MB/sec over a 1.5G of assorted sized data files, oddly down to the 3 side of it when hitting the bigger files). I can see optimally, reading it, 20+ for platter HDs -- close to my higest optimal and fastest Patriot 8G pendrive -- 25MB/sec (to a HD) for a quad-channel and a Class 10 device. This one, Color-(somesuch name, heh, w/out LEDs), is suboptimal to that, slightly slower, but faster yet than a Sony Class10 32G micro-card, fitted in a Kingston USB pendrive-type adaptor. This TC is all I've tested out of my three best, (8/32/32), although off a 640G 7200 Seagate, to the SDD, the Samsung SSDl hits 80,000Kbytes/s. Only thing spectacular, and rest of the SDD experience is roughly normal, thereabouts, to slower speeds I'm used to this neck of the woods. (Seeing 40MB/s on a HD used to be having a real good day.) Team Color Turn 32GB USB 2.0 Flash Drive (Brown) Model TG032GE902CX Item #: N82E16820313090 19.99 free ship |
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