On 1 Dec 2013, at 18:55, Jim Klimov <jimkli...@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 _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
