Hi, my problem was, that write speed to the device is got really slow from 7 Mb/s to 250 Kb/s, so 16.76 Mb/sec is probably the speed limitation of the uSD Card or is close to that. Do you activated blk-mq for scsi in kernel config or in boot parameters? Regards, Andrej On Tue, 10 Feb 2015 17:10:18 -0500 Douglas Gilbert <dgilbert@xxxxxxxxxxxx> wrote: > Here is an example: > > # ddpt if=/dev/sg1 bs=512 of=x.bin > 1953792+0 records in > 1953792+0 records out > 1281 retries after EAGAIN error(s) during IO > time to transfer data: 59.678788 secs at 16.76 MB/sec > > That is not a bad transfer time but other utilities > or drivers might dwell longer on those (nuisance) EAGAINs. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
