[OpenIndiana-discuss] usb vesrion

[Chris Ridd]

On 1 Dec 2013, at 18:55, Jim Klimov <jimklimov at cos.ru> wrote:

> On 2013-12-01 19:05, Pavel Vlček wrote:
>> I have usb 2.0 only and I can not see the flash drive in boot manager.
>> When I install the usb version to the flash drive, it takes 10 seconds
>> only and all data are there. It are lost when I disconnect and connect
>> the flash driver after the installation.
> 
> I think this (10 sec for a gigabyte of data) is too fast for a USB
> flash. Maybe the writes got cached and are slowly pouring onto the
> device? The ones I had only work at a few Mbyte/sec - 6, 10, max 20.
> 
> Your results of 100Mbyte/sec are unbelievable (given that USB2 is
> 480 Mbit/sec max, or about 60Mbyte/sec including protocol overheads) :)
> 
> From casual googling I found this table of USB Flash speeds:
> http://usb3speed.nirsoft.net/?pdesc=JetFlash+Transcend+16GB+USB+Device&vid=34148&pid=4096
> 
> The "JetFlash Transcend 32GB USB Device" ranks from 50 to 80Mbyte/s
> reads and 10 to 25Mbyte/sec writes. Certainly far from 100 :)
> 
> So I can suggest to re-flash the device and wait for a couple of
> minutes before disconnecting it.

Another possibility is that the drive doesn't have 32GB of flash in it - it is either defective or a counterfeit job. Try writing 32GB to it from another OS and see if you can read it all back out again.

Chris