Output of "lsscsi -i" shows that sdb is a legitimate assignment and not some fluke.
Code:
[0:0:0:0]    disk    ATA      WDC WD7500BPVT-7 1A01  /dev/sda   -
[1:0:0:0]    cd/dvd  TSSTcorp DVD+-RW TS-L633J D500  /dev/sr0   -
[6:0:0:0]    disk    Generic- Multi-Card       1.00  /dev/sdb   Generic-_Multi-Card_20090516388200000-0:0