The one of the biggest problems of usb flash drives is a slow data write speed. This article will guide you through the process that can possibly increase your flash stick write speed. Okay, first I bought Transcend 8GB usb flash stick. It had been formatted with FAT32 filesystem initially. So I decided to run data read/write speed test. Mount the filesystem and execute following # hdparm -t /dev/sdb /dev/sdb: Timing buffered disk reads: 102 MB in 3.05 seconds = 33.43 MB/sec $ dd count=100 bs=1M if=/dev/urandom of=/media/disk/test 100+0 records in 100+0 records out 104857600 bytes (105 MB) copied, 29.5112 s, 3.6 MB/s The disk read speed is good enough, but the write speed is not so good. That's because most of NAND flash drives (the most commonly used flash sticks) have 128k erase block size. Filesystems usually have 4k (4096 bytes) block size. And here we came into problem. If the filesystem blocks are not aligned to flash drive blocks, the performance overhead during disk writ...
Comments
Post a Comment